Built for developers and creators
All-in-one Online Toolbox
No installation and no account required. Explore tools for encoding, data inspection, networking, design, media, and engineering. Most inputs stay in the active browser tab; tools that need public network data explain the request they make.
Encoding & Conversion
1D barcode generator
Industrial grade optical recognition generation engine. Supports CODE128, EAN and other standards, has built-in dynamic format constraints, and produces lossless SVG and high-resolution PNG.
Hash hash operation
Supports MD5, SHA-256 and API HMAC signatures, and has streaming reading technology to easily decode very large files in seconds.
URL Encode / Decode
It provides extremely fast two-way transcoding and has a built-in high-level visual URL parameter parser to elegantly decompose complex API requests.
Base64 Converter
Supports bidirectional conversion of strings (perfect support for Chinese), and conversion of image files to Data URI. Pure front-end computing, secrets are not leaked.
QR Code Generator
A bridge that transforms digital information into physical dimensions. Quickly encode complex URLs or text into high-resolution 2D matrices.
HTML Entity Lookup
Complete HTML Entity query comparison tool. Covers 200+ entities and supports real-time search of names, codes, Unicode, and characters. Built-in Entity Encoder/Decoder Playground, favorites and recent query functions.
ASCII Table
A complete ASCII character query comparison tool. Covers all codes from 0-255, supports Decimal, Hex, Binary, and Unicode searches, and has built-in text converter, favorites, and recent query functions. Pure front-end local computing ensures privacy and security.
Unicode Character Lookup
Complete Unicode character query and analysis tool. Covers 13 major categories and supports Character Analyzer, Unicode Inspector (ZWJ combination analysis), and UTF-8/UTF-16 encoding real-time operations. Built-in favorites and recent query functions.
Base Number Converter Base Number Converter
Binary, Octal, Decimal, and Hex can be converted to each other instantly. Supports Signed/Unsigned mode, 8/16/32/64-bit bit width, Overflow check, ASCII/Unicode character display and bit attribute analysis. Pure front-end local computing.
Text Encoder & Decoder encoding and decoding tools
Supports seven formats: Base64, URL Encode, HTML Entity, Unicode Escape, JS/JSON/XML Escape. Automatic detection of encoding types, batch conversion, and Encoding Inspector analysis.
Morse Code Translator
Two-way conversion between text and international Morse code, supporting English letters, numbers and common punctuation.
Binary Text Converter
Convert Unicode text into 8-bit binary data according to UTF-8, and the text can also be completely restored.
Braille Translator
Convert English letters to Unicode Braille symbols and support Braille reverse interpretation.
Roman Numeral Converter
Strict bidirectional conversion between 1–3999 Arabic numerals and standard Roman numerals.
Unicode Normalizer
Compare the four Unicode normalization results and code points of NFC, NFD, NFKC, and NFKD.
Escape Sequence Converter
Convert newlines, tabs, quotes, and Unicode control characters into safe escape sequences or vice versa.
Data Size Converter
Accurately convert B, KB, MB, GB, TB to KiB, MiB, GiB, TiB.
Subtitle Converter
Convert time formats between SRT and WebVTT, and shift subtitle timelines in batches.
Base32 Converter
Converts bidirectionally between UTF-8 text and Base32 strings according to RFC 4648, supporting auto-filling and format validation.
Base58 Converter
Convert UTF-8 literals using the unobfuscated Bitcoin Base58 alphabet, correctly preserving leading zero bytes.
Quoted Printable Converter
Encode UTF-8 email text to Quoted-Printable, or restore equal hex and soft-wrapped content.
CSV Delimiter Converter
Safely convert between CSV, TSV, and custom delimited formats, and correctly handle double quotes, newlines, and in-field delimiters.
SVG Data URI Converter
Convert SVG source code to percentage or Base64 Data URI, and back to a downloadable SVG file.
Base36 Converter
Exactly convert very large integers between decimal and Base36, without being restricted by JavaScript's general Number safe bounds.
Base62 Converter
Converts between UTF-8 literals and Base62 representation in both directions using the 0–9, A–Z, a–z alphabet.
Ascii85 Converter
Encode UTF-8 text to Adobe ASCII85, or decode content containing the z abbreviation and optional bracketing characters.
Byte Endian Converter
Reverses the order of hexadecimal bytes in 16-, 32-, or 64-bit bytes, showing Little Endian versus Big Endian contrast.
Mac Address Formatter
Verify 48-bit MAC Address, output colon, hyphen, Cisco dot, and plain hexadecimal format.
Luhn Check Digit Calculator
Calculate or verify the Luhn Mod 10 checksum and indicate whether the complete number passes the checksum.
Cbor Diagnostic Converter
Convert between CBOR Hex and JSON safe views, supporting Integer, Literal String, Byte, Array, Map, Boolean and Null.
web development
IP Footprint and Purity Monitor
Accurately analyze IP physical coordinates and ISP nodes. Built-in deep threat intelligence to instantly identify VPN, proxy and data center camouflage. Supports global IP query and hardware fingerprint detection.
Cidr Calculator
Professional CIDR subnet calculation tool that supports IPv4 / IPv6. Real-time calculation of Network Address, Broadcast, available IP range, Netmask, binary view and CIDR Cheat Sheet.
File Checksum
Calculate MD5, SHA-1, SHA-256, SHA-384, SHA-512, and compare with the official Checksum with one click. Supports Drag & Drop, multi-file mode, automatic format recognition, and pure front-end local computing.
Optical barcode scanning and parsing
Give the browser industrial-grade optical recognition capabilities. Supports real-time lens scanning and image analysis, and accepts QR Code and mainstream barcodes. Native edge computing absolutely guarantees privacy.
Cron schedule parser
Visualize scheduling spells against humanity. Provides real-time Chinese translation, dynamic structure decomposition, and supports cross-time zone deduction of future execution trajectories.
Regex testing and building
Powerful regular expression parsing engine. Supports real-time syntax highlighting, multi-tag comparison and commonly used regular grammar libraries to accurately capture string characteristics.
Regex Builder
Automatically generate regular expressions by checking conditions. Built-in Cheat Sheet, commonly used templates, Regex Explain analysis and Complexity Meter complexity analysis.
Timestamp conversion and parsing
Fully automatic two-way parsing engine. Supports conversion between UNIX timestamps and human-readable time, completely eliminating cross-time zone debugging obstacles.
User-Agent Parser UA analysis tool
Paste the UA string to instantly analyze the browser, OS, device, rendering engine, CPU architecture and bot detection. Supports one-click access to the current browser UA, Raw Analysis segmented explanations, and Copy/Download functions.
URL Parser
Paste the URL to instantly analyze the complete composition of Protocol, Host, Port, Path, Query String, Hash, etc. Supports Query table parsing, domain analysis, URL structure diagram, and health check. Pure front-end computing.
Query String Parser parameter parsing tool
Parse, edit, validate URL Query Parameters. Supports editable tables, JSON ↔ Query conversion, URL Encode/Decode, sorting and deduplication. Suitable for API development and SEO.
Cron Expression Builder schedule generator
Graphical Cron schedule generator supports visual settings, Reverse Parse, Next Run preview and 11 commonly used Presets.
Flexbox Playground Pattern Generator
Interactive CSS Flexbox visual playground. Supports complete configuration of Containers and Items, and real-time preview and copy of CSS and HTML. Built-in 20+ Presets and Items for individual editing.
CSS Grid Generator grid generator
Interactive CSS Grid visual layout tool. Supports Columns, Rows, Gap, and Item editing, and instantly previews and copies CSS and HTML. 20+ Presets built-in.
CSS Clamp Calculator
Computational fluid fonts and responsive sizing, supporting px/rem, Viewport sliders, actual size previews and common Typography presets.
CSS Animation Generator
Nine commonly used animations and complete playback parameters, instant play, pause, restart and output animation and @keyframes.
Cubic Bezier Editor
Drag P1/P2 to edit the animation curve and compare the time progress of linear, ease and various standard easing simultaneously.
Viewport Size Checker
Real-time display of Viewport, Screen, DPR and device level, and applicable Media Query is generated simultaneously when the window is zoomed.
Device Resolution Checker
Unpack screen CSS size, Viewport, DPR, estimate physical pixels, touch and color depth, and support report export.
CSS Unit Converter
Convert px, rem, em, vw, vh, % based on root font, parent font, Viewport and percentage base.
CSS Specificity Calculator
Analyze CSS Selector's ID, category, and element weight line by line to quickly find override conflicts.
CSS Transform Generator
Numerically control displacement, rotation, scale, skew, and origin, and instantly preview CSS Transforms.
CSS Text Shadow Generator
Adjust shadow displacement, blur, color, and transparency to instantly produce reproducible text-shadows.
CSS Clip Path Generator
Choose from a triangle, rhombus, hexagon, star, and other presets, or enter Polygon coordinates.
HTML Minifier
Remove redundant comments and spaces between tags, while protecting pre, textarea, script, and style blocks.
CSS Minifier
Clear general comments and redundant white space, keep optional important authorization comments and calculate savings ratio.
Responsive Breakpoint Generator
Create a Mobile First or Desktop First Media Query template with a name and pixel list.
CSS Box Model Calculator
Calculate the actual border and layout size of the element based on the content size, Padding, Border, Margin and box-sizing settings.
CSS Triangle Generator
Set the direction, base, height and color to instantly generate CSS triangles and previews with pure Border techniques.
CSS Scroll Snap Generator
Combine scroll direction, snap strength, item alignment, and padding to produce ready-to-use Scroll Snap CSS.
Media Query Range Generator
Generate modern Range Syntax or traditional min-width/max-width responsive queries based on minimum and maximum widths.
HTML Table Generator
Convert CSV, TSV or custom-delimited data into semantic thead and tbody HTML tables and safely skip content.
CSS Transition Generator
Combine properties, durations, delays, and timing functions to produce Transition CSS and instant previews.
CSS Outline Generator
Set width, style, color and offset to produce a CSS Outline that does not affect the box model.
CSS Mask Generator
Generate a linear or radial CSS Mask, control direction, center, fade start and end points.
Object Position Generator
Adjust object-fit and horizontal and vertical position to generate image or video cropping and positioning CSS.
Responsive Srcset Generator
Generate img srcset and picture HTML based on filename templates, width lists, and Sizes rules.
Iframe Sandbox Builder
Select the allowed iframe Sandbox capabilities, Lazy Loading and Permissions Policy to generate embedded HTML.
Aria Label Auditor
Parse HTML fragments to find buttons, links, input fields, and images that lack accessible names.
Promise Combinator Simulator
Use Resolve/Reject and completion time to simulate the timing and results of Promise.all, allSettled, race, and any.
API / HTTP
HTTP Status Codes
Complete HTTP status code comparison query tool. Covers more than 60 status codes from 1xx to 5xx, providing detailed Chinese descriptions, common causes, repair suggestions and SEO impact analysis. Supports real-time search, category filtering and collection functions.
MIME Type type query comparison table
Complete MIME Type query comparison tool. Covering 10 major categories such as Text, Image, Audio, Video, and Application, it supports Extension ↔ MIME two-way query, HTTP Header preview and collection functions.
Port Number Lookup
Complete Port Number query comparison tool. Covers three categories: Well Known, Registered, and Dynamic, and supports TCP/UDP filtering, security recommendations, and collection functions.
JWT decoders and encoders
Parse, validate and generate JSON Web Tokens. Provides payload structured inspection and Signature cryptography verification, never leaking keys.
HTTP Header Analyzer
Paste Request/Response Header to instantly analyze security headers, CORS configuration, cache policy, and cookie security. Supports Security Score, Header Reference, and cURL parsing.
Curl Command Builder
Combine safe and readable cURL commands based on HTTP method, URL, headers, authentication method and body.
Cache Control Generator
Combine public, private, max-age, s-maxage, immutable and revalidation strategies.
CSP Header Generator
Establish content security policies such as default-src, script-src, style-src, img-src, etc.
CORS Header Generator
Generates full CORS response headers based on source, method, headers, credentials and preflight cache.
Cookie Parser
Split the Cookie or Set-Cookie content into names, values and attributes, and output clear JSON.
HTTP Date Converter
View each other between RFC 7231, ISO 8601, Unix seconds, milliseconds and Taipei time.
Accept Header Builder
Set the primary media format, quality weight, and backup formats to generate an Accept Header that meets content negotiation purposes.
Content Disposition Generator
Generate attachment or inline Content-Disposition, taking into account ASCII fallback and UTF-8 file names.
Oauth Pkce Generator
Use browser cryptography to secure random numbers and SHA-256 to generate OAuth 2.0 Code Verifier and Code Challenge.
DNS Record Parser
Parse common DNS Zone records into structured JSON, supporting A, AAAA, CNAME, MX, TXT, NS, CAA and other types.
HTTP Auth Header Generator
Quickly generate Bearer Token, Basic Auth or custom API Key Header, and handle UTF-8 Basic credential encoding.
HTTP Link Header Builder
Combines URL, rel, type, hreflang and crossorigin to produce an HTTP Link Header that can be placed in the response.
Retry After Calculator
Converts between delay seconds and HTTP date format, and generates a Retry-After Header based on the specified time.
Rate Limit Header Calculator
Based on the quota, used amount, window length and reset time, RateLimit related headers and remaining proportion are generated.
JSON / XML / YAML
JSON Formatter
A developer’s data lens. Provides strict grammar verification and structured typesetting, reshaping chaotic strings into hierarchical data.
JSON to YAML Converter
Quickly convert JSON data to standard YAML format! Supports Pretty Output, Minify, indentation settings and array format preservation. Built-in JSON verification engine and accurately marks the location of syntax errors.
YAML to JSON Converter
Quickly convert YAML configuration files to standard JSON format! Supports Pretty/Minified JSON, Key sorting, indentation settings and intelligent detection of multiple Documents (automatic merging --- separated files). The built-in YAML verification engine pinpoints syntax errors.
JSON to CSV Converter
Quickly convert JSON data to CSV format for easy import into Excel and Google Sheets! Supports nested JSON automatic flattening (Nested Flatten), custom delimiters, UTF-8 BOM, and Raw/Table dual views. Built-in JSON validation engine.
CSV to JSON Converter
Quickly convert CSV data to standard JSON format! Supports automatic type detection (Type Detection), three output modes (Object Array / Key-Value / Nested Object), nested field expansion, and CSV upload. Built-in CSV validation engine.
XML to JSON Converter
Quickly convert XML data to standard JSON format! Support Pretty Print, Minify, Attribute processing (@ prefix, #text node). Built-in XML validation engine, automatically detects Sitemap / RSS / SOAP types. Provides Raw and Tree View dual viewing modes.
JSON to XML Converter
Quickly convert JSON data to standard XML format! Supports customizing Root Element and Array Item names, Pretty Print, Minify, and XML Declaration switches. Built-in JSON verification engine to accurately locate syntax errors. Provides Raw and Tree View dual viewing modes.
XML Formatter
Validates XML syntax and provides beautifying indentation or single-line compression. Standard XML files can be downloaded.
JSON Flattener
Flatten nested objects and arrays into path keys, and restore structure from path objects.
JSON Path Tester
Use $.key, [index] and [*] to query JSON nodes, display the number of matches and formatted results.
Env File Converter
Converts between .env variables and JSON objects in both directions, handling quotes, exports, and annotations.
Markdown Table Generator
Use comma-separated titles and data columns to quickly create left, center, or right Markdown tables.
Ini JSON Converter
Convert between common INI sections and JSON objects in both directions, recognizing numbers, Boolean values, and regular strings.
JSON Array Sorter
Sorts a JSON array numerically, textually, or by date by nested field path without modifying the original input.
JSON Key Case Converter
Recursively convert JSON key names to camelCase, snake_case, kebab-case or PascalCase.
XML Escape Converter
Convert between normal text and XML Entity, supporting five predefined entities and decimal and hexadecimal character references.
CSV to SQL Insert
Convert CSV headers and data columns into batch SQL INSERT, handle NULL, numbers, Boolean values and single quote escapes.
CSV Transposer
Convert CSV or TSV columns to columns and columns to columns, and correctly handle quotes and blank cells.
CSV Row Filter
Filter CSV data columns by field, text, or numeric criteria, retain headers, and output a new CSV.
JSON to Typescript
Parses JSON objects and arrays, generates TypeScript Interfaces, and infers basic types, nested structures, and nullable values.
JSON to SQL Schema
Infer the field name and SQL type from the JSON sample to generate a CREATE TABLE draft.
word processing
Text Compare
Quickly compare the differences between two pieces of text, supporting three modes: character, single word, and line. Real-time Diff highlighting, similarity scoring, Unified Diff and Side-by-Side viewing. Suitable for comparison of program code, configuration files, and AI output.
Case Converter case converter
Instant conversion between 12 text case formats. Built-in Programming Naming Helper, view all naming conventions such as camelCase, PascalCase, snake_case, kebab-case, etc. at once. A must-have tool for developers.
Word Counter
Real-time statistics of word count, character count, paragraphs, sentences and reading time. Built-in platform restriction checker to quickly confirm whether the content complies with the word limit of X, YouTube, Meta, Instagram and other platforms.
Text Cleaner text cleaning and formatting
Remove extra spaces/blank lines/duplicate lines, full-width conversion, Unicode normalization, remove HTML/Markdown/Emoji. Built-in AI Output cleaning and one-click Presets.
Line Sorter
A→Z, Z→A, Natural Sort, random shuffle and other sorting methods. The built-in Sort Preview visually marks the movement direction of each row, so the sorting results are clear at a glance.
Duplicate Line Remover Duplicate Line Remover
Quickly remove duplicate lines in text, support retaining the first/last occurrence, case sensitivity, and ignore whitespace and empty lines. Built-in Highlight Duplicate Lines visual highlighting, confirm first and then remove.
Remove Empty Lines
Quickly clean up blank lines, unnecessary line breaks and blank paragraphs in text. Supports 6 cleaning modes, Trim Spaces, Preview Difference and real-time preview of differences. Suitable for organizing code, Log, Markdown, and AI output.
Markdown to HTML Converter
Convert Markdown to standard HTML instantly! Supports complete syntax for titles, tables, code blocks, to-do lists, etc. Dual view mode (Render/Source), one-click copy and download.
HTML to Markdown Converter
Quickly convert HTML source code to clean, readable Markdown! Supports complete label conversion for titles, tables, code blocks, lists, etc. Built-in cleaner, remove redundant inline styles and blank attributes with one click.
Diff Checker text difference comparison
Line/Word/Char three comparison modes, synchronous scrolling JSON mode, AI prompt detection, similarity analysis and detailed statistics.
Lorem Ipsum Generator dummy text generator
Paragraph/sentence/single-word fake text generation, supporting Fake Data (name, email, address), development data (JSON/CSV/SQL) and UI Placeholder content. Built-in reading time statistics.
Slug Generator
Quickly convert text into clean SEO-friendly URL slug. Supports custom delimiters, case conversion, removal options and batch generation mode. Pure front-end local computing.
Word Frequency Counter
Count word occurrences based on Unicode word segmentation, and control word length, case, and display quantity.
Reading Time Calculator
Calculate Chinese characters and English words separately, and estimate the reading time of the article based on the customized reading speed.
N Gram Generator
Create N-gram based on words or characters, and count adjacent combinations and frequency of occurrence.
Text Column Extractor
Extract specified fields from CSV, TSV or custom delimited text, and can remove duplicates and clean white spaces.
Text Template Filler
Populate the {{variables}} template with JSON or key=value data and list fields not yet provided.
Regex Escape Tool
Safely escape regular special characters for a complete pattern, character class, or replacement.
Email Extractor
Extract email addresses from articles, HTML or record text, remove duplicates and sort them alphabetically.
URL Extractor
Extract HTTP, HTTPS and selected www URLs from mixed text and remove common trailing punctuation.
Number Extractor
Extract negative numbers, decimals and thousandths digits from text on demand and provide summaries and average summaries.
Text Wrapper
Set the length of each line according to Unicode characters or English words, automatically organize long text and choose whether to retain the original line breaks.
Whitespace Visualizer
Convert spaces, tabs, newlines and non-newline spaces into visible symbols, and count the number of various types of whitespace.
List Merger
Perform union, intersection, difference, or column-by-column matching of two row-by-row lists, with controllable English case comparison.
Levenshtein Distance Calculator
Calculate the minimum number of insertions, deletions, and substitutions required between two pieces of Unicode text, and convert the visual similarity.
Markdown Outline Generator
Capture Markdown ATX headers, producing an indented outline and optional anchor table of contents.
Markdown Link Extractor
Extract Markdown inline links, images, and autolinks, and output tags, URLs, and type lists.
Text Chunk Splitter
Split text based on the maximum number of characters and overlap length, giving priority to paragraph, period, or whitespace boundaries.
Line Numbering Tool
Add a line number to each line that can set the starting value, step, zero padding and delimiter.
Prefix Suffix Tool
Add prefixes and suffixes to non-blank or all text lines in batches, and skip content that already meets the conditions.
ASCII Diagram Editor
Follow the Box, Line, Arrow, and Text commands to create flow charts and architecture diagrams on the character grid, and output pure text diagrams.
development tools
UUID Generator
High-precision logo generator based on hardware acceleration. Supports high-throughput batch casting to ensure absolute uniqueness of database primary keys.
ID Generator unique identification code generator
Supports six formats: UUID v4/v7, ULID, Nano ID, CUID2, and Short ID. Batch generation, repeated inspection, collision probability estimation, and multi-format export.
Date Calculator
Calculate date difference, date addition and subtraction, working days, age, countdown days. Supports leap year judgment, ISO Week Number, and built-in calendar preview.
UUID Decoder & Inspector analysis tool
UUID v1~v8 full version analysis, Timestamp decoding, Variant detection, Node ID extraction, UUID comparison and format conversion.
File Magic Number Recognition Engine
Analyze real file formats through Magic Number, supporting drag-and-drop upload and Hex query. Built-in 150+ file signature reference tables.
Password Generator Password Generator
High-strength password and passphrase generator that supports real-time strength analysis, entropy calculation, cracking time estimation and QR Code export.
Password Hash Generator Password Hash Tool
Supports bcrypt, Argon2id, and PBKDF2 password hash generation and verification. Contains Salt generation, Cost settings, Benchmark and algorithm comparison.
Audio Studio
Browser DAW audio editor. Supports waveform display, clip segmentation, EQ/Reverb/Distortion effects, voice change Preset, multi-track mixing, and spectrum analysis. Drag and drop loading, pure front-end operation offline.
Random String Generator
Safely generate up to 1000 sets of strings, supporting custom characters, URL Safe, Hex, unique, Entropy and multi-format export.
Random Number Generator
Safe whole numbers and decimals, unique numbers, sorted shuffles, plus dice, lotto, percentage mode and full export.
HMAC Generator
Use Web Crypto to generate a SHA-1, SHA-256, SHA-384, or SHA-512 HMAC.
AES Encryption Tool
Derive AES-256-GCM key with PBKDF2, including random Salt, IV and verification tag.
Semver Calculator
Verify, compare and upgrade Semantic Version's Major, Minor, Patch and Pre-release versions.
Chmod Calculator
Use numbers to select owner, group, and other permissions, and generate octal, symbolic, and chmod commands.
SQL Formatter
Organize keywords, line breaks, and indentations for general, MySQL, PostgreSQL, and SQLite queries.
Gitignore Generator
Combine Node.js, Python, PHP, Java, .NET, operating systems and IDE ignore rules.
Git Command Builder
Produce quoted Git commands based on Clone, Branch, Commit, Rebase, Tag, or Cherry Pick operations.
Dockerfile Generator
Generate Dockerfile with adjustable version and port according to Node.js, Python, PHP or Nginx static website requirements.
Package JSON Generator
Set the npm package name, version, module type, Scripts and Dependencies to generate a properly formatted package.json.
Code Comment Remover
Remove JavaScript/CSS, HTML or Shell/Python annotations and retain strings and basic line-breaking structures.
JavaScript String Escaper
Convert any text into a JavaScript string that can be used in single quotes, double quotes, or Template Literal.
Shell Argument Escaper
Convert line-by-line arguments into argument strings that can be safely pasted by POSIX Shell, PowerShell, or Windows CMD.
GitHub Actions Generator
Set branches, versions, installation, testing and build steps based on Node.js or Python projects to generate Workflow YAML.
Nginx Config Generator
Generate static website or reverse proxy Server Block, including Domain, Port, Gzip and common security headers.
Source Map Explorer
Parse Source Map VLQ Mappings and query the original files, rows, and embedded sources corresponding to Bundle rows and rows.
Ebnf Railroad Visualizer
Parses commonly used EBNF rules, references and options, producing rule summaries, undefined references, loop prompts and railway previews.
JavaScript Event Loop Visualizer
Simulate synchronization work, Microtask, Task and derivative work, and output the step-by-step execution sequence of Call Stack and Queue.
Vision and image processing
SVG Studio
Professional-grade SVG workstation. Real-time editing preview, smart optimization, color replacement, element analysis, batch conversion and export to PNG/JPG/WebP/ICO, all completed in the browser.
Watermark Forge
Protect your digital assets. Supports real-time zooming by dragging the canvas, global matrix shield (anti-AI image theft) and optical hybrid rendering. 100% browser-side asynchronous batch operation, absolutely guaranteeing privacy.
Image cropping and zooming tools
Accurately converge any image to the target dimension. Supports free cropping, aspect ratio locking, forced resolution output and WebP compression. 100% native computing.
Video bit rate deduction computer
Professional two-way code rate deduction engine. Supports forward file size estimation and reverse target capacity calculation rate, accurately strips out information loss and built-in upload prediction.
Image Compressor
Supports JPEG/PNG/WebP, pure front-end edge computing. Achieve the perfect balance between image quality and file size to ensure your images never leak.
Image Converter
Overcoming format barriers, supporting seamless local conversion of images to each other, solving the pain point of software or websites not supporting specific formats.
File scan generator
Quickly reduce noise from photos taken with mobile phones and convert them into clean white-background scanned files. Completely relies on local computing to ensure file confidentiality.
color toolbox
Integrate accurate color absorption of images, cross-color space conversion (RGB/HEX/HSL), intelligent algorithm color matching and gradient rendering engine.
Color Palette Generator
Automatically generate complete color gradations based on the main color. Supports a variety of colors such as Monochromatic, Complementary, Triadic, etc., and copies color values and CSS Variables with one click.
Color Contrast Checker Contrast check
Tests color contrast according to WCAG 2.1 standard. Supports HEX/RGB/HSL, real-time preview, AA/AAA compliance assessment and improvement suggestions.
Random Color Generator Random Color Generator
Randomly generate beautiful colors with one click. Supports 10 modes such as Pastel, Vibrant, Neon, and Earth Tone, locks colors, and exports HEX/RGB/HSL/PNG/SVG/JSON/CSS.
Color Mixer
Mix two colors and adjust the ratio to instantly create a new color. Supports HEX/RGB/HSL/CSS, copy color values and export PNG/SVG/CSS Variables with one click.
CSS Gradient Generator gradient generator
Visual CSS gradient generator, supporting Linear, Radial, and Conic gradients. Built-in 30+ popular Presets, instant preview, one-click copy of CSS, and export of PNG/SVG.
Box Shadow Generator shadow generator
Visual CSS Box Shadow editor. Supports multiple shadow overlays, Inset shadows, real-time preview and 30+ preset styles. Copy CSS and export PNG with one click.
Border Radius Generator rounded corner generator
Visual CSS Border Radius editor. Supports independent control of four corners, ellipse rounding, unit switching, real-time preview and 30+ preset styles. Copy CSS and export PNG/SVG with one click.
Line Sticker Tool
Integrate pixel cropping and transparency processing. An image editing module specially built for communication software texture specifications, liberating the efficiency of art editing.
Favicon Generator
Upload images to generate favicon.ico, Apple Touch Icon and PWA icons with one click. Built-in square cropping, multi-size PNG, ZIP packaging and HTML quote code. Pure front-end local computing.
Aspect Ratio Calculator
Quickly calculate the aspect ratio of images, videos and screens, and automatically reduce it to the simplest integer ratio. Built-in commonly used ratio presets, locked ratio conversion, resize calculation and real-time preview.
CSS Filter Generator
Upload images and adjust ten CSS Filters, providing instant preview, Preset, side-by-side and slider comparison, and one-click copy.
Color Blindness Simulator
Simulates eight color vision differences, supports pictures and color chips, side-by-side or slider comparisons, download results and website accessibility suggestions.
Sprite Sheet Slicer
Split the Sprite Sheet according to columns, margins and spacing, preview each frame and generate Atlas coordinate data.
Image Difference Heatmap
Align the two images and compare them pixel by pixel to generate a heat map of difference rate, change area and adjustable tolerance.
Contact Sheet Maker
Arrange multiple local images into a printable contact list according to the specified number of columns, size, spacing and file name tags.
Image Measurement Overlay
Correct the image to a known proportion, measure the length and angle on the screen and output a preview with annotations.
App Icon Mask Preview
Apply masks such as Circle, Rounded Square, and Squircle to the icon to check the safe area and multi-size recognition.
Label Sheet Designer
Create precise label placement and printable HTML based on paper, borders, columns, spacing, and data rows.
Image Metadata Privacy Inspector
Check JPEG, PNG and WebP dimensions, EXIF, GPS, camera, date and text blocks to mark privacy information you should be aware of before sharing.
Artificial Intelligence and Computing Engine
Wheel Spinner
A must-have for tail tooth draws, class roll call, and those with difficulty choosing. Supports customizing lists and importing TXT files. It has real physical scrolling effects, lottery sound effects and automatic elimination of winners.
Dice Roller
Professional grade pure front-end 3D dice rolling tool. Perfectly supports TRPG running group specifications from D4 to D20. It has real physical tumbling effects, independent dice locking, and real-time probability statistics.
Ollama Modelfile builder
Convert complex Modelfile syntax into a visual interface. Supports real-time preview, parameter levers and status memory, and quickly creates a local-exclusive LLM soul.
Sdxl Prompt Builder
Professional-grade Stable Diffusion XL Prompt engineering module. Structured construction of positive and negative mantras.
AI Token Cost Calculator
Accurately estimate API fees for AI models such as OpenAI GPT-5, Claude Opus/Sonnet/Haiku, DeepSeek, Gemini, etc. Supports cost comparison, visual charts and smart optimization suggestions.
LLM VRAM Calculator
Accurately estimate the GPU VRAM and system memory required for local LLM deployments such as Llama, DeepSeek, and Qwen. Supports quantization format, Context Length, GPU compatibility judgment and reverse query.
GPU Value Calculator
A complete GPU database supports cost-effective analysis of multiple scenarios such as AI inference, games, and editing. A vs B comparisons, radar charts, electricity cost estimates, buying advice all available.
Physical Hardware and Electronic Engineering
Logic Gate Simulator
Professional-grade online logic gate and truth table deduction sandbox. It supports ANSI standard symbols and can instantly simulate the flow of underlying signals such as AND, OR, and XOR through intuitive node connections.
Extruder stepper motor calibration
The ultimate dashboard for troubleshooting physical extrusion errors in 3D printing. Perfectly adapted to the dual architecture of Marlin (E-Steps) and Klipper, it can deduce compensation parameters and generate control instructions in real time.
Display transmission bandwidth derivation matrix
High-end hardware debugging hub. Accurately deduce the ultimate bandwidth (Gbps) required for resolution and update rate, instantly determine HDMI/DP specifications, and uncover the black box of DSC compression operation.
Circuit component decoding and voltage division
The hardware engineer’s Swiss knife. Provides interactive color ring resistor decoding, SMD patch reverse analysis, and dynamic voltage dividing computer recommended by E-Series.
PC Build Planner
Accurately calculate computer assembly costs and plan your digital engine. Provides real-time price summation and hardware configuration review.
SSD Endurance
SSD endurance calculation engine based on TBW specifications. Enter the daily write volume to accurately deduce the estimated lifespan and usage scenario recommendations of the solid state drive.
RAID Calculator
Disk array capacity planning tool supporting RAID 0/1/5/6/10. Calculate available capacity, fault tolerance, and utilization, and provide visual diagrams and smart RAID recommendations.
PSU power supply wattage calculator
Accurately calculate computer host power consumption and recommend the best power supply. Built-in popular CPU/GPU database supports Intel Core Ultra, AMD Ryzen 9000, and NVIDIA RTX 50 series.
RAM Latency Calculator
Compare real latency (ns) of DDR4 / DDR5 memory. Supports simultaneous comparison of dual configurations, quickly selects common specifications, and has built-in latency visualization charts and usage scenario suggestions.
PCIe Bandwidth Calculator
Compare the real bandwidth of each generation and Lane number of PCIe 1.0~6.0. Supports dual configuration comparison, built-in GPU/SSD quick selection, and provides actual impact analysis and visual charts.
File transfer time calculator
Accurately estimate the time required for file transfer and support automatic conversion between MB/GB/TB and Mbps/Gbps/MB/s/GB/s. Built-in USB/SATA/NVMe/Ethernet/Wi-Fi quick selection, efficiency slider simulates real situations.
Gcode Toolpath Viewer
Analyze G0/G1 coordinates, extrusion amount and feed rate, count Travel, Extrusion, Bounds, Layer and display XY path.
Stl Mesh Inspector
Analyze Binary/ASCII STL, count triangle surfaces, Bounds, surface area, volume, degenerate surfaces and basic mesh quality.
Inductive Reactance Calculator
Inductive Reactance Calculator calculates inductive reactance from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Capacitive Reactance Calculator
Capacitive Reactance Calculator calculates capacitive reactance from the supplied parameters, with live validation, a readable formula note, and local browser processing.
RLC Resonance Calculator
RLC Resonance Calculator calculates resonant frequency from the supplied parameters, with live validation, a readable formula note, and local browser processing.
RC Time Constant Calculator
RC Time Constant Calculator calculates time constant from the supplied parameters, with live validation, a readable formula note, and local browser processing.
RL Time Constant Calculator
RL Time Constant Calculator calculates time constant from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Non-Inverting Op-Amp Gain Calculator
Non-Inverting Op-Amp Gain Calculator calculates voltage gain from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Transistor Base Resistor Calculator
Transistor Base Resistor Calculator calculates base resistor from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Zener Series Resistor Calculator
Zener Series Resistor Calculator calculates series resistor from the supplied parameters, with live validation, a readable formula note, and local browser processing.
LM317 Output Voltage Calculator
LM317 Output Voltage Calculator calculates output voltage from the supplied parameters, with live validation, a readable formula note, and local browser processing.
PCB Trace Resistance Calculator
PCB Trace Resistance Calculator calculates trace resistance from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Wire Voltage Drop Calculator
Wire Voltage Drop Calculator calculates voltage drop from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Copper Wire Resistance Calculator
Copper Wire Resistance Calculator calculates wire resistance from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Antenna Wavelength Calculator
Antenna Wavelength Calculator calculates wavelength from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Coaxial Cable Loss Budget
Coaxial Cable Loss Budget calculates total loss from the supplied parameters, with live validation, a readable formula note, and local browser processing.
RF Link Budget Calculator
RF Link Budget Calculator calculates received power from the supplied parameters, with live validation, a readable formula note, and local browser processing.
dBm to Watts Converter
dBm to Watts Converter calculates power from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Signal-to-Noise Ratio Calculator
Signal-to-Noise Ratio Calculator calculates signal-to-noise ratio from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Amplitude Ratio to Decibels Calculator
Amplitude Ratio to Decibels Calculator calculates amplitude difference from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Audio Sampling Storage Calculator
Audio Sampling Storage Calculator calculates uncompressed size from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Audio Distance Delay Calculator
Audio Distance Delay Calculator calculates delay from the supplied parameters, with live validation, a readable formula note, and local browser processing.
SPL Distance Attenuation Calculator
SPL Distance Attenuation Calculator calculates target spl from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Solar Panel Daily Output Calculator
Solar Panel Daily Output Calculator calculates daily energy from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Off-Grid Solar Battery Sizing Calculator
Off-Grid Solar Battery Sizing Calculator calculates required capacity from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Inverter Sizing Calculator
Inverter Sizing Calculator calculates recommended capacity from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Generator Fuel Consumption Estimator
Generator Fuel Consumption Estimator calculates fuel consumption from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Transformer Turns Ratio Calculator
Transformer Turns Ratio Calculator calculates secondary voltage from the supplied parameters, with live validation, a readable formula note, and local browser processing.
AC Power Factor Calculator
AC Power Factor Calculator calculates power factor from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Three-Phase Power Calculator
Three-Phase Power Calculator calculates three-phase real power from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Single-Phase Apparent Power Calculator
Single-Phase Apparent Power Calculator calculates apparent power from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Capacitor Energy Calculator
Capacitor Energy Calculator calculates stored energy from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Inductor Energy Calculator
Inductor Energy Calculator calculates stored energy from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Data analysis and statistics
Descriptive Statistics Calculator
Calculate quantity, sum, mean, median, quartiles, variation and standard deviation at once, supporting sample and population modes.
Weighted Average Calculator
Enter the corresponding values and weights, and calculate the standardized weighted average and weight sum.
Percent Change Calculator
Calculates the percentage change from the old value to the new value, or the percentage difference between two values regardless of orientation.
Percentile Calculator
After sorting the values, linearly interpolates the specified 0th to 100th percentiles.
Z Score Calculator
Calculate Z Score based on observations, mean, and standard deviation, and estimate standard normal cumulative percentiles.
Correlation Calculator
Calculate Pearson's r for two sets of equal length series and provide a brief interpretation of the direction and strength of the correlation.
Linear Regression Calculator
Calculate least squares method slope, intercept, R² and predicted value for specified X from pairs of X, Y values.
Confidence Interval Calculator
Based on the sample mean, standard deviation, sample number and confidence level, use the normal approximation to estimate the confidence interval of the mean.
Sample Size Calculator
Based on the confidence level, allowable error, estimated proportion and limited matrix correction, estimate the number of samples required for the proportional survey.
Permutation Combination Calculator
Exactly compute permutations P(n,r), combinations C(n,r), and repeatable combinations H(n,r) as BigInts.
CSV Pivot Table Builder
Select columns, columns, values and aggregation methods, create a pivot analysis table in the browser and output it to CSV.
CAGR Calculator
CAGR Calculator calculates compound annual growth rate from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Annualized Return Calculator
Annualized Return Calculator calculates annualized return from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Revenue Growth Calculator
Revenue Growth Calculator calculates revenue growth from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Contribution Margin Ratio Calculator
Contribution Margin Ratio Calculator calculates contribution margin ratio from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Degree of Operating Leverage Calculator
Degree of Operating Leverage Calculator calculates degree of operating leverage from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Cash Conversion Cycle Calculator
Cash Conversion Cycle Calculator calculates cash conversion cycle from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Inventory Turnover Calculator
Inventory Turnover Calculator calculates inventory turnover from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Days Sales Outstanding Calculator
Days Sales Outstanding Calculator calculates days sales outstanding from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Customer Acquisition Cost Calculator
Customer Acquisition Cost Calculator calculates customer acquisition cost from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Customer Retention Rate Calculator
Customer Retention Rate Calculator calculates customer retention rate from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Customer Churn Rate Calculator
Customer Churn Rate Calculator calculates customer churn rate from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Net Promoter Score Calculator
Net Promoter Score Calculator calculates net promoter score from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Conversion Rate Calculator
Conversion Rate Calculator calculates conversion rate from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Average Order Value Calculator
Average Order Value Calculator calculates average order value from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Cart Abandonment Rate Calculator
Cart Abandonment Rate Calculator calculates cart abandonment rate from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Email Open Rate Calculator
Email Open Rate Calculator calculates open rate from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Click-Through Rate Calculator
Click-Through Rate Calculator calculates click-through rate from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Cost per Click Calculator
Cost per Click Calculator calculates cost per click from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Cost per Acquisition Calculator
Cost per Acquisition Calculator calculates cost per acquisition from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Return on Ad Spend Calculator
Return on Ad Spend Calculator calculates return on ad spend from the supplied parameters, with live validation, a readable formula note, and local browser processing.
GMROI Calculator
GMROI Calculator calculates gmroi from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Economic Order Quantity Calculator
Economic Order Quantity Calculator calculates economic order quantity from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Utilization Rate Calculator
Utilization Rate Calculator calculates utilization rate from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Queue Average Wait Time Calculator
Queue Average Wait Time Calculator calculates average wait time from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Little’s Law System Size Calculator
Little’s Law System Size Calculator calculates average items in system from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Process Throughput Calculator
Process Throughput Calculator calculates average throughput from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Takt Time Calculator
Takt Time Calculator calculates takt time from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Process Cycle Efficiency Calculator
Process Cycle Efficiency Calculator calculates process cycle efficiency from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Defects per Million Calculator
Defects per Million Calculator calculates defects per million from the supplied parameters, with live validation, a readable formula note, and local browser processing.
First Pass Yield Calculator
First Pass Yield Calculator calculates first pass yield from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Process Capability Index Calculator
Process Capability Index Calculator calculates process capability cp from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Weighted Decision Score Calculator
Weighted Decision Score Calculator calculates weighted decision score from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Business and Life Computing
Profit Margin Calculator
Calculate gross profit, gross profit margin, cost mark-up rate and gross profit per unit from revenue, cost and sales volume.
Break Even Calculator
Based on fixed costs, unit selling prices, variable costs and target profits, estimate the balance sheet and target sales volume.
Compound Interest Calculator
Calculate the initial principal, annual interest rate, compound interest frequency and estimated future value of monthly investment after a specified period.
Loan Payment Calculator
The expected repayment time after monthly payment, total interest and additional repayments is estimated using the average principal and interest amortization formula.
Discount Calculator
Integrate percentage discounts, coupons and tax rates to calculate the final price, savings and actual discount ratio.
Unit Price Calculator
Compares the unit cost of two items with different prices and capacities, showing the price difference and relative savings.
Electricity Cost Calculator
Estimate power consumption, cost and reference carbon emissions based on equipment power, usage hours, days, quantity and electricity cost per kilowatt hour.
Fuel Cost Calculator
Calculate fuel consumption and transportation cost per person based on distance, average fuel consumption, fuel price, traffic cost and number of people to share.
Work Hours Calculator
Calculate daily working hours, total working hours and estimated amount based on commuting time, rest minutes, working days and hourly wage, supporting midnight shifts.
Roi Calculator
Calculate net income, ROI, recovery multiple and annualized rate of return from the initial investment, total income, additional costs and period.
Concrete Slab Volume Calculator
Concrete Slab Volume Calculator calculates concrete volume from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Concrete Column Volume Calculator
Concrete Column Volume Calculator calculates concrete volume from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Mortar Volume Estimator
Mortar Volume Estimator calculates dry material volume from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Brick Quantity Calculator
Brick Quantity Calculator calculates required bricks from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Concrete Block Wall Calculator
Concrete Block Wall Calculator calculates required blocks from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Tile Quantity Calculator
Tile Quantity Calculator calculates required tiles from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Flooring Waste Allowance Calculator
Flooring Waste Allowance Calculator calculates purchase area from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Paint Coverage Calculator
Paint Coverage Calculator calculates paint required from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Wallpaper Roll Calculator
Wallpaper Roll Calculator calculates required rolls from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Plaster Volume Calculator
Plaster Volume Calculator calculates plaster volume from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Drywall Sheet Calculator
Drywall Sheet Calculator calculates required sheets from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Insulation Net Area Calculator
Insulation Net Area Calculator calculates purchase area from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Pitched Roof Area Calculator
Pitched Roof Area Calculator calculates sloped area from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Rainwater Harvest Calculator
Rainwater Harvest Calculator calculates harvestable rainwater from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Water Tank Fill Time Calculator
Water Tank Fill Time Calculator calculates fill time from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Irrigation Runtime Calculator
Irrigation Runtime Calculator calculates runtime from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Rectangular Pool Volume Calculator
Rectangular Pool Volume Calculator calculates water volume from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Aquarium Volume Calculator
Aquarium Volume Calculator calculates theoretical volume from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Room Heating Load Estimator
Room Heating Load Estimator calculates estimated heating load from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Room Cooling Load Estimator
Room Cooling Load Estimator calculates estimated cooling load from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Lightning Distance Estimator
Lightning Distance Estimator calculates estimated distance from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Topsoil Volume Calculator
Topsoil Volume Calculator calculates soil volume from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Mulch Volume Calculator
Mulch Volume Calculator calculates mulch volume from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Gravel Weight Calculator
Gravel Weight Calculator calculates gravel weight from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Asphalt Tonnage Calculator
Asphalt Tonnage Calculator calculates asphalt mass from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Stair Step Count Calculator
Stair Step Count Calculator calculates suggested steps from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Ramp Length Calculator
Ramp Length Calculator calculates minimum horizontal run from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Fence Post Count Calculator
Fence Post Count Calculator calculates post count from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Deck Board Count Calculator
Deck Board Count Calculator calculates board count from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Curtain Fabric Area Calculator
Curtain Fabric Area Calculator calculates fabric area from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Storage Bin Usable Capacity Calculator
Storage Bin Usable Capacity Calculator calculates usable capacity from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Moving Box Count Estimator
Moving Box Count Estimator calculates suggested boxes from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Savings Goal Monthly Contribution Calculator
Savings Goal Monthly Contribution Calculator calculates monthly contribution from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Emergency Fund Calculator
Emergency Fund Calculator calculates suggested emergency fund from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Debt-to-Income Ratio Calculator
Debt-to-Income Ratio Calculator calculates debt-to-income ratio from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Loan-to-Value Ratio Calculator
Loan-to-Value Ratio Calculator calculates loan-to-value ratio from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Capitalization Rate Calculator
Capitalization Rate Calculator calculates capitalization rate from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Gross Rental Yield Calculator
Gross Rental Yield Calculator calculates gross rental yield from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Break-Even Occupancy Calculator
Break-Even Occupancy Calculator calculates break-even occupancy from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Billable Hours Target Calculator
Billable Hours Target Calculator calculates target billable hours from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Overtime Pay Calculator
Overtime Pay Calculator calculates overtime pay from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Prorated Salary Calculator
Prorated Salary Calculator calculates prorated salary from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Leave Accrual Calculator
Leave Accrual Calculator calculates accrued leave from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Weighted Grade Calculator
Weighted Grade Calculator calculates weighted grade from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Credit-Weighted GPA Calculator
Credit-Weighted GPA Calculator calculates gpa from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Required Final Exam Score Calculator
Required Final Exam Score Calculator calculates required final exam score from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Study Hours Planner
Study Hours Planner calculates suggested study per day from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Reading Pace Calculator
Reading Pace Calculator calculates reading pace from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Presentation Speaking Time Calculator
Presentation Speaking Time Calculator calculates estimated speaking time from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Typing Productivity Calculator
Typing Productivity Calculator calculates effective words typed from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Mathematics and Engineering Computing
Ohms Law Calculator
Calculate the remaining electrical parameters based on two known quantities of voltage, current, resistance, or power.
Voltage Divider Calculator
Calculate the divided voltage output, branch current and resistor power consumption without load or with load resistor.
Led Resistor Calculator
Calculate the recommended resistance and power rating based on the power supply, LED forward voltage drop, number of LEDs in series, and target current.
Resistor Color Code Calculator
Calculate resistance, magnification and tolerance according to the four-ring or five-ring color code, and output easy-to-read engineering units.
Capacitor Code Converter
Convert between capacitor three-digit codes and pF, nF, µF values, supporting common tolerance letters.
Battery Runtime Calculator
Estimate the ideal battery life based on capacity, voltage, load power, conversion efficiency and available depth.
Dc Power Calculator
Calculate power, Wh, kWh and charge based on DC voltage, current and operating time.
Series Parallel Resistance Calculator
Enter multiple resistance values and calculate the total resistance in series or the equivalent resistance in parallel and the ratio of each branch.
Temperature Unit Converter
Accurately convert between Celsius, Fahrenheit, Kelvin and Rankine temperature scales and check absolute zero.
Pressure Unit Converter
Convert between Pa, kPa, MPa, bar, psi, atm, mmHg and Torr.
Thin Lens Image Distance Calculator
Thin Lens Image Distance Calculator calculates image distance from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Camera Field of View Calculator
Camera Field of View Calculator calculates horizontal field of view from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Depth of Field Range Calculator
Depth of Field Range Calculator calculates total depth of field from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Illuminance Calculator
Illuminance Calculator calculates average illuminance from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Luminous Efficacy Calculator
Luminous Efficacy Calculator calculates luminous efficacy from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Kinetic Energy Calculator
Kinetic Energy Calculator calculates kinetic energy from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Gravitational Potential Energy Calculator
Gravitational Potential Energy Calculator calculates potential energy from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Momentum Calculator
Momentum Calculator calculates momentum from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Impulse Calculator
Impulse Calculator calculates impulse from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Centripetal Force Calculator
Centripetal Force Calculator calculates centripetal force from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Projectile Range Calculator
Projectile Range Calculator calculates horizontal range from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Free-Fall Time Calculator
Free-Fall Time Calculator calculates fall time from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Terminal Velocity Estimator
Terminal Velocity Estimator calculates terminal velocity from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Friction Force Calculator
Friction Force Calculator calculates friction force from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Torque Calculator
Torque Calculator calculates torque from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Rotational Mechanical Power Calculator
Rotational Mechanical Power Calculator calculates mechanical power from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Gear Output Speed Calculator
Gear Output Speed Calculator calculates output speed from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Pulley Output Speed Calculator
Pulley Output Speed Calculator calculates output speed from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Hydraulic Pressure Power Calculator
Hydraulic Pressure Power Calculator calculates hydraulic input power from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Roof Pitch Angle Calculator
Roof Pitch Angle Calculator calculates pitch angle from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Gutter Flow Capacity Calculator
Gutter Flow Capacity Calculator calculates design flow from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Pipe Flow Rate Calculator
Pipe Flow Rate Calculator calculates volumetric flow from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Pipe Velocity Calculator
Pipe Velocity Calculator calculates mean velocity from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Pump Head Power Calculator
Pump Head Power Calculator calculates input power from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Air Changes per Hour Calculator
Air Changes per Hour Calculator calculates air changes per hour from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Room Ventilation Airflow Calculator
Room Ventilation Airflow Calculator calculates required airflow from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Material Thermal Resistance Calculator
Material Thermal Resistance Calculator calculates thermal resistance from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Steady-State Heat Transfer Calculator
Steady-State Heat Transfer Calculator calculates heat transfer rate from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Dew Point Calculator
Dew Point Calculator calculates dew point from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Heat Index Calculator
Heat Index Calculator calculates heat index from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Wind Chill Calculator
Wind Chill Calculator calculates wind chill from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Sound Travel Time Calculator
Sound Travel Time Calculator calculates travel time from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Air Density Calculator
Air Density Calculator calculates air density from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Standard Atmosphere Pressure Calculator
Standard Atmosphere Pressure Calculator calculates standard pressure from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Average Rainfall Intensity Calculator
Average Rainfall Intensity Calculator calculates average intensity from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Runoff Volume Calculator
Runoff Volume Calculator calculates runoff volume from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Cable Tray Fill Calculator
Cable Tray Fill Calculator calculates fill percentage from the supplied parameters, with live validation, a readable formula note, and local browser processing.
Project and Operational Planning
Pert Estimation Calculator
Calculate PERT expected value, standard deviation and approximate confidence range based on optimistic, most likely and pessimistic durations.
Task Priority Scorer
Combines impact, urgency, risk, confidence and workload to produce comparable task priority scores.
Pomodoro Session Planner
Estimate the number of Pomodoros and completion time based on workload, focus period, short breaks, long breaks and cycles.
Time Block Schedule Generator
Generate period-by-period work schedule based on start, end, block length, rest and task list.
Meeting Cost Calculator
Estimate single and annual costs based on number of participants, average salary, meeting time and indirect cost rate.
Freelance Rate Calculator
Estimate minimum quoted hourly rate based on target annual revenue, operating expenses, billable hours, tax buffer and profit margin.
Inventory Reorder Point Calculator
Calculate reorder points and covered days based on average demand, lead days and safety stock.
Safety Stock Calculator
Estimate safety stock and reorder point based on demand standard deviation, average lead time and service level Z-value.
Customer Lifetime Value Calculator
Estimating customer lifetime value based on average orders, purchase frequency, gross profit margin, retention period and acquisition cost.
Sales Commission Calculator
Commission is calculated based on sales volume, basic commission rate, threshold, excess reward rate and fixed bonus.
Incident Timeline Workbench
Organize the incident time, severity, events, evidence and responsible persons, calculate information gaps and generate a Markdown timeline.
Requirements Traceability Matrix
Establish a Coverage Matrix of requirements, testing and delivery evidence to identify unverified requirements and isolated tests.
Raci Matrix Workspace
Establish a RACI matrix based on tasks and roles, and check for issues such as missing Responsible, no or multiple Accountables, etc.
Meeting Agenda Timekeeper
Calculate the current progress, timeout and updated schedule based on agenda paragraphs, scheduled minutes, host and elapsed time.
Risk Register Heatmap
Create risk scores, 5×5 heat maps and priority lists based on probability, impact, owners and mitigation measures.
Research Evidence Matrix
Connect claims, sources, supporting directions, and qualities to identify conclusions that lack evidence or have only a single source.
Seating Chart Designer
Automatically generate preliminary seating configurations, conflict and unassigned lists based on table type, capacity, guest group and preference.
File and data formats
Hex File Viewer
Inspect a local file in Offset, Hex Bytes, and ASCII columns with a configurable preview limit.
File BOM Detector
Checks if the beginning of the file contains a UTF-8, UTF-16, or UTF-32 BOM and displays the preceding bytes.
Line Ending Converter
Recognize LF, CRLF and CR in the text, convert it into the specified line break format and retain the content.
JSONL Converter
Convert between JSON array and JSON Lines format, returning invalid JSON line by line.
TOML JSON Converter
Parse common TOML sections, strings, numbers, booleans, and arrays, or generate TOML settings from JSON.
Java Properties Converter
Converts between Java .properties and JSON, handling annotations, escape characters, and dotted nest keys.
Fixed Width Data Parser
Cut fixed column width data according to field names and width specifications, and output the table to JSON or CSV.
M3U Playlist Parser
Parse the EXTINF, title, group and media URL of M3U/M3U8 and output a structured list.
vCard Generator
Enter your name, phone number, email, company and address to generate a downloadable vCard 3.0 or 4.0.
iCalendar Event Generator
Create ICS calendar events with time zone, start and end time, location, description and reminder.
Elf Header Inspector
Parse the bit order, ABI, file type, CPU architecture, Entry Point and Table Offset of ELF32/ELF64 in the browser.
Sqlite File Header Inspector
Parse the page size, format version, page number, text encoding, Schema Cookie and version fields of the SQLite Database Header.
File Entropy Map
Compute file Shannon Entropy based on fixed blocks, display high and low entropy sections, distribution heat map and exportable summary.
Duplicate File Finder
Calculate the reclaimable capacity and generate an inventory by grouping multiple files with the same file size as SHA-256 locally.
Intel Hex Memory Map
Analyze Intel HEX Record, Extended Address and Checksum, and sort out the actual address range, gaps, overlaps and Entry Points.
Zip Archive Inspector
Read the ZIP central directory, organize the file path, compression method, size, encryption flag and suspicious path, without decompressing the content in the whole process.
Font File Inspector
Parse the Table Directory, Name Records and Variable Font axis of TTF/OTF; WOFF lists the basic Header and Table summary.
PDF Page Range Planner
Analyze the relative position and exclusion rules of single pages, ranges, odd and even pages, and last pages, and output the verified page order and simplified range.
Wasm Module Inspector
Analyze WebAssembly Magic, version, Section order and size, number of common Section items and Export list, and output the module structure.
Browser and device testing
Keyboard Event Tester
Real-time display of key, code, modifier key, Repeat and key combination status, retaining recent events.
Pointer Event Tester
Track coordinates, pressure, keys, pointer type, tilt and movement trajectories in the interactive area.
Touch Gesture Tester
Identify the number of touch points, sliding distance, direction, pinch zoom and rotation angle.
Gamepad Tester
Detects controllers connected to the browser and instantly displays buttons, joystick axes, and vibration capabilities.
Clipboard Format Inspector
Lists MIME Types, plain text, and HTML fragments in the clipboard after user authorization.
Drag Drop Data Inspector
Displays the Kind, MIME Type, file name, size, and text data type of the dragged item.
Browser Permissions Dashboard
Query the status of browser permissions such as camera, microphone, positioning, notifications, and clipboard.
Browser Capability Checker
Check out features like WebAssembly, WebGL, WebGPU, Service Worker, WebRTC, Web Share, and more.
Screen Orientation Tester
Real-time display of screen size, Viewport, orientation, angle, Pixel Ratio and Visual Viewport.
Network Information Viewer
Displays Online status, connection type, Effective Type, RTT, Downlink and Data Saver.
Serial Log Decoder
Parse the Serial Log containing timestamp and Hex Bytes, split the Frame according to intervals, and decode text, control characters and transmission time.
Device Motion Log Analyzer
Analyze time, acceleration, and orientation angle CSVs to calculate resultant acceleration, sampling interval, each axis range, and peak events that exceed thresholds.
Vibration Pattern Analyzer
Analyze vibration and pause millisecond sequences, output total duration, duty cycle, beat timeline and available JavaScript array.
Media Codec Support Tester
Query canPlayType and MediaCapabilities support, smoothness and power saving results by MIME, Codec, Resolution, Bitrate and FPS.
Web quality and auditing
Har File Analyzer
Analyze HAR files and sort out the number of requests, status codes, domains, transfer sizes, time consuming and the slowest resources.
Lighthouse Report Viewer
Read Lighthouse JSON, aggregate classification scores, Core Web Vitals, improvement suggestions and failure audits.
HTML Heading Auditor
Parse H1–H6, create a document outline and mark skipped levels, empty headings, and multiple H1s.
HTML Link Rel Auditor
Check target=_blank, nofollow, sponsored, ugc, download and rel settings for external links.
HTML Form Accessibility Auditor
Check the Label, ID, Name, Autocomplete and required prompts of Input, Select and Textarea.
HTML Table Accessibility Auditor
Check whether Caption, header, Scope, Headers association and table are suspected to be used for typesetting.
CSS Variable Extractor
Retrieve CSS Custom Properties, grouped by Scope, name and value, marking duplicate definitions and var() usage.
CSS Selector Usage Auditor
Compare CSS Selector with HTML fragments and list the rules that can be matched, not matched, and cannot be statically analyzed.
CSS Layer Visualizer
Parse @layer declarations and nested rules to display Layer order, unlayered styles and dependencies.
Web Manifest Auditor
Validate Manifest JSON's Name, Icons, Start URL, Display, Theme Color, and common PWA fields.
Deployment and development workflow
SRI Hash Generator
Generate SHA-256, 384, 512 Integrity values for pasted CSS/JavaScript or native files.
Security Txt Generator
Create security.txt fields such as Contact, Expires, Encryption, Policy, Acknowledgments, etc.
Bookmarklet Builder
Wrap, minify, and encode JavaScript into javascript: Bookmarklet, providing test and readable versions.
systemd Service Generator
Generate Unit File based on service name, execution command, user, environment variables and restart strategy.
Docker Compose Generator
Create a single service Compose YAML, including Image, Port, Volume, Environment, Healthcheck and Restart.
SSH Config Generator
Generate configuration fragments based on Host, Hostname, User, Port, IdentityFile, ProxyJump and KeepAlive.
Caddyfile Generator
Generate Caddyfile for static websites or Reverse Proxy, supporting compression, Header, Root and SPA Fallback.
Apache .htaccess Generator
Generate common rules for HTTPS, WWW, SPA Rewrite, cache, compression and security headers.
Cookie Header Builder
Combine Name, Value, Domain, Path, Expires, Max-Age, Secure, HttpOnly and SameSite.
Curl to Fetch Converter
Parse common cURL parameters and convert them into browser Fetch JavaScript, retaining Method, Header and Body.
Software License Compatibility Matrix
Create a compatibility, conditional, conflict and unknown matrix based on output authorization and dependent package authorization, and list the main obligations.
Git History Graph
Convert structured Git Log into Commit DAGs, Branch/Tag tags, author timelines, and searchable snippets.
Directory Tree Builder
Organize the path list into an ASCII or Unicode directory tree according to ignore rules, and count directories, files and maximum depth.
Package Lock Analyzer
Analyze package-lock JSON for direct and indirect dependency packages, duplicate versions, Integrity, sources and development dependency distribution.
Content cleaning and maintenance
GitHub Issue Template Generator
Create a Markdown Issue Template, including problem description, reproduction steps, environment, checklist and Label.
Conventional Commit Builder
Generates Conventional Commit based on Type, Scope, Summary, Body, Breaking Change and Issue.
Changelog Entry Generator
Generate Keep a Changelog format based on version, date and Added/Changed/Fixed/Removed content.
npm Script Builder
Combine Dev, Build, Test, Lint, Format, Clean with serial and parallel execution of Script JSON.
Git Rebase Todo Builder
After pasting the Commit list, arrange the Rebase Todo using Pick, Reword, Edit, Squash, Fixup, and Drop.
JSON Patch Generator
Compares two JSONs to generate Add, Remove, Replace operations and JSON Pointer paths.
PII Redactor
Detect and mask emails, phone numbers, IPs, ID card styles, credit card styles and custom keywords.
Log Level Filter
Identify TRACE, DEBUG, INFO, WARN, ERROR, FATAL, and filter the output according to levels and keywords.
Stack Trace Cleaner
Removed duplicate frames, Node Modules, internal calls and query strings, keeping core error paths.
Markdown Frontmatter Parser
Parse YAML/TOML/JSON Front Matter at the beginning of Markdown and separate fields and text.
Web Server Log Analyzer
Analyze Apache or Nginx Common/Combined Log and count status codes, methods, popular paths, traffic and time distribution.
Information structure and validation
CSV Column Profiler
Analyses the empty, unique, range, average and common content of the CSV columns, and quickly captures the quality of the information.
CSV Schema Inference
Insulated from a CSV sample string, integer number, floating point number, boolean value, date and empty value to produce readable Schema.
JSON Schema Sample Generator
Read the usual JSON Schema type, attributes, necessary fields, Enum, Default and array rules, and produce an example.
JSON Schema Validator
Checks with browsers whether JSON data conforms to the usual Type, Required, Products, Items, Enum and length rules.
YAML Path Explorer
Parsing the common YaML object and array structure, listing the point number paths, type and content of each value.
XML Namespace Inspector
Collapse the number of expressions in XML and the number of namesspaces, Prefix, elements and properties that you use.
SQL Query Parameterizer
Replaces the common string and numerical constants in SQL with the name or question mark parameter and consolidates the list of corresponding parameters.
SQL Identifier Quoter
Quote table and column names according to PostgreSQL, MySQL, SQL Server or SQLite rules and handle retention and jump.
Delimited Data Sampler
A representative information column is extracted from CSV, TSV or custom partition data by fixed spacing, random seeds or back and forth segments.
Data Record Deduplicator
Creates a composite key with the specified CSV or JSON Key to keep the first, last or duplicate group.
Protobuf Wire Decoder
Parse Protobuf Field Number, Wire Type, Varint, Fixed and Length-delimited raw content from Hex or Base64.
SQL Set Operation Simulator
Use two sets of data to simulate UNION, UNION ALL, INTERSECT and EXCEPT to present duplicate value retention rules.
Data Quality Rule Builder
Check CSV with rules such as Required, Type, Range, Regex, Unique Value, etc., and output column-by-column violation and rule JSON.
Schema Drift Comparator
Compare the paths, types and occurrence rates of two batches of JSON samples to find out the addition, removal and incompatible changes of fields.
Database Index Prefix Planner
Composite index Leftmost Prefix, sort coverage, and candidate order are evaluated against the query's equality, range, sort, and selection fields.
Database Normalization Workbench
Check Partial/Transitive Dependency and BCNF by Attributes, Candidate Keys and Functional Dependencies.
Data Join Playground
Perform Inner, Left, Right or Full Join on two JSON arrays based on the specified Key, and list matching and orphan records.
SQL Ddl Schema Visualizer
Parse CREATE TABLE, fields, Primary Key and Foreign Key, and output Schema summary and data table association diagram.
Markdown and Content Workstream
Markdown Task List Manager
Parsing Markdown Checkbox, filtering, renumbering, switching and output of a sorted list of tasks by completion status.
Markdown Citation Formatter
The list of names of the names of the authors, titles, publication years, websites, DoI and web sites is linked to Markdown by the APA, MLA or Chicago style references.
Markdown Footnote Manager
Scan Markdown Note-References and Definitions, identify missing, unused and duplicate items and renumber them in the order in which they appear.
Markdown Link Rewriter
Rewrite the Markdown line link to the photo address in a series of Base URLs, path prefixes or domain rules.
Markdown Callout Builder
Creates the Markdown Callout block of GitHub or Obsidian style of Note, Tip, Warning, Important.
Text Pattern Highlighter
Finds text clips in keywords or in formal expressions, insert Markdown tags and produces a hit position summary.
Sentence Segmenter
Splits sentences by the middle English label, abbreviation and line break, providing numbering, length and sentence-by-speech.
Bilingual Line Aligner
Aligns two language texts by paragraphs or lines, and identifies missing text and output Markdown Table, TSV or JSON.
Unicode Confusable Detector
Finds Latin, Cyril, Greek and whole-shaped characters used in the text, listing Code Point, Script and suspicious positions.
Keyboard Layout Converter
Converts the character that was entered in the configuration between the QWERTY and the acoustic key, and keeps the contents that cannot be matched.
Web Agreements and Policies
Permissions Policy Generator
Select the permissible source for the functions of Camera, Microphone, Geologue, Fullscreen, etc. to produce HTTP Header.
Referrer Policy Advisor
A strategy for comparing private, analytical, cross-source and HTTPS downgrade demand produces recommendations for Header and the behavioural matrix.
CORS Preflight Simulator
The absence or conflict of CORS Header is indicated by source, Method, Request Headers and the server responding to the results of the simulation pre-test.
Cache Key Builder
Cache Key and a summary of the rules can be read in Method, Host, Path, Query, Header, Cookie and the device conditions.
CSP Policy Auditor
The CSP command and source are analyzed, and unsafe-inline, Wildcard, and the lack of a fallback and common protection command is checked.
Robots Meta Generator
The group of Index, Folo, Snippet, Image Preview, Vidio Preview and translation restrictions, produces Meta and X-Robots-Tag.
Openapi Operation Extractor
Take Method, Path, Operation ID, Tag, Parameters and Response Status from OpenAPI JSON, output endpoint list.
GraphQL Query Formatter
Formats the GramQL Query, Mutation, Fragment and parameters, and provides a balance between indents and basic brackets.
URL Pattern Tester
Enter the URLPattern and multiple web sites to test Pathname, Hostname, Protocol rules and list the pick-up groups.
HTTP Vary Header Builder
Vary Header is a source and Cache blast risk based on content consultation, compression, language, and Clit Hints conditions.
Service Worker Cache Simulator
Simulate the process of Cache First, Network First, Stale While Revalidate and other strategies in the connection and cache state.
Cookie Samesite Simulator
Determine whether cookies are sent based on SameSite, Secure, Domain, request method, top-level navigation and cross-site situations.
Mime Multipart Builder
Generate CRLF-compliant Multipart Body, Header and length summary based on Boundary, Subtype and multiple Parts.
Webrtc Sdp Session Inspector
Analyze the Media, Codec, ICE, Fingerprint, Direction, Candidate and BUNDLE of SDP Offer/Answer.
API Contract Example Matrix
Check whether each response status of API Operation has Example, and establish a matrix of success, verification, authorization and error cases.
Websocket Frame Decoder
Parse FIN, RSV, Opcode, Mask, Payload Length and text content from Hex, and verify Frame basic rules.
Mqtt Topic Matcher
Create a Topic/Filter hit matrix based on MQTT's single-layer and multi-layer wildcard rules and check for invalid filters.
HTTP Structured Fields Parser
Parse Structured Fields Item, List and Dictionary, output typed values, parameters and Canonical representation.
Tls Client Hello Inspector
Parse the Record Version, Cipher Suites, Compression, Extensions, SNI, Supported Versions and ALPN of the TLS ClientHello Hex.
Cross Origin Isolation Planner
Compare COOP, COEP, and CORP combinations based on Popup, third-party resources, and Credential requirements to generate headers and compatibility summaries.
Front-end widgets and Styles
CSS Supports Builder
Combining the CSS properties and values of And, Or, Not Future Query, produces @supports blocks that can be used directly.
CSS Font Stack Builder
Deals with the use of space names and common family.
CSS Logical Properties Converter
Converts the Leg/Right writings of Margin, Padding, Border and positioning to the Inline/Block logical properties.
CSS Selector Tester
Implements CSS Selector in a segregated HTML section, listing the hit elements, paths, text and attribute summaries.
SVG Sprite Builder
Merges multiple SVGs, extracts ViewBox and content, and produces examples of Symbol Sprite and Use that can be used again.
SVG Path Formatter
Dismantling SVG Path commands, harmonizing whitespace and decimal precisions, and checking the basic structure of commands and parameters.
HTML Landmark Auditor
Check the number, name and nest status of Header, Nav, Main, Aside, Fouter and ARIA Role.
HTML Dialog Builder
Generates original Dialog HTML, CSS and JavaScript examples by title, content, button and close.
HTML Picture Builder
The Picture elements and Fallback are combined by AVIF, WebP, size breakpoint, Srcset and Alt text.
HTML Details Builder
Creates accessible Details/Summary foldings to support preset expansion, group names and basic styles.
Observer API Playground
Enter the Intersection Ratio sequence and Threshold to simulate the Callback trigger point and generate the Observer configuration code.
Media and Exchange Formats
SRT Cue Splitter
The maximum number of words, points and minimum display time is too long to be split between SRT Cue, and time is redistributed and numbered.
WebVTT Validator
Check WEBVTT Header, Cue Time, Order, Overlap, Set and Gap Separability, listing the questions that can be located.
WebVTT Chapter Generator
Automatically calculates the end time by chapter title and start time, creating WebVTT Chapters for the film.
Podcast Chapter Builder
Creates Podcasting 2.0 Chapters JSON, which contains start times, titles, web sites and graphics fields.
Cue Sheet Generator
Creates standard CUE Sheet by album, performer and track start time, and validates the MM:SS:FF format.
OPML Outline Builder
Converts the indent outline or the Feed list to OPML 2.0 to support text nodes and RSS XML URLs.
RSS Feed Builder
The results are produced from the channel information and several articles, RSS 2.0 XML, processing dates, GUID, summaries and necessary jumps.
Social Share Link Builder
Share links with HTML by web site, title and summary
Wi-Fi QR Payload Builder
Standard-generation is set by SCID, password, WPA/WEP/No password and hidden web.
vCard Parser
Parsing vCard 3.0/4.0 Common Columns, Multivalent Phones, Email, Address and Jumping Characters, output JSON digest.
Video Frame Extractor
Load local video and capture frames at intervals or specified times to generate thumbnails, timecodes and contact lists.
Chordpro Chart Transposer
Parse ChordPro inline chords and instructions, transpose semitones while preserving lyric position, slash chord and score structure.
Rhythm Pattern Sequencer
Arrange drum beats, tempos and swings on a step grid, preview beats and export Pattern JSON.
Midi Message Decoder
Decode MIDI Hex messages into Note, Velocity, Control Change, Program, Pitch Bend, Channel and System messages.
Fonts and internationalization
Gettext Po Catalog Auditor
Parse the Gettext PO/POT directory and check for untranslation, fuzzy, plural missing, duplicate Msgid and Placeholder inconsistencies.
Unicode Line Break Inspector
Mark whitespace, punctuation, CJK, hyphens, combined characters and forced line breaks verbatim, and preview the positions where line breaks are allowed and where line breaks are prohibited.
Ruby Annotation Editor
Match this article with pronunciation to idioms in Ruby HTML, providing superscript and subscript positions, font levels, and real-time layout preview.
Vertical Writing Preview Studio
Preview Chinese and Japanese vertical layout and generate HTML/CSS with Writing Mode, Text Orientation, line spacing and column height.
Locale Fallback Simulator
Normalize BCP 47 Language Tag, simulate Lookup, layer-by-layer fallback and final matching results according to the support list.
Variable Font Axis Playground
Read the fvar Axis of SFNT TTF/OTF variable fonts, or use the built-in demonstration axis to adjust Weight, Width and generate CSS.
Typography Scale Designer
Create a complete layout preview and Design Tokens from title to content based on base font level, proportion, line height and breakpoints.
Diagrams and Process Modeling
Data Lineage Canvas
Create a data flow diagram with source, transformation, storage and consumption nodes, check loops and output Mermaid.
Sankey Flow Diagram Maker
Convert Source, Target, and Value tables into nodes and weighted streamlines to produce scalable SVG previews.
Sequence Diagram Workbench
Create sequence diagrams based on participants, messages, responses and annotations, and output SVG and Mermaid syntax.
Process Swimlane Designer
Generate SVG flowcharts and structured JSON based on role lanes, steps, decisions and handover relationships.
Survey Skip Logic Designer
Create questions, options, and Next Rules, simulate answer paths, and find loops, dead ends, and unreachable questions.
Customer Journey Map
Create journey grids and emotional curves based on stages, touch points, emotions, pain points and opportunities.
User Story Map Board
Sort Story Map by user activity, work, release and priority, showing version slices and gaps.
Information security and privacy testing
Email Source Privacy Inspector
Parse EML Header, delivery path, verification results, remote images, tracking pixels and external links to generate privacy summaries.
CSV Formula Injection Scanner
Locates CSV cells starting with a formula control character, providing column positions, risk classification, and safe escaped copies.
Pem Certificate Inspector
Decodes PEM/DER base ASN.1 structures, listing fingerprints, dates, OIDs, block sizes, and common credential risks.
SSH Known Hosts Auditor
Parse known_hosts Marker, Host Pattern, Key Type, Fingerprint and duplicate hosts to identify weak algorithms and conflicting keys.
Secret Pattern Scanner
Scan code and configuration text for Private Keys, Tokens, connection strings, common key formats, and high-entropy candidates.
Webauthn Options Validator
Check the Challenge, RP, User, Algorithms, Timeout and Base64URL fields of the Registration/Authentication Options.
Accessibility and internationalization
Bcp47 Language Tag Inspector
Normalize BCP 47 language tags and disassemble Language, Script, Region, Variant and Unicode Extension.
Intl Locale Format Explorer
Use the browser Intl API to preview numbers, currencies, dates, relative times, lists, and plural categories side-by-side.
Icu Message Validator
Check the ICU MessageFormat brackets, variables, Plural and Select branches, and list the rules and test data that are missing other.
Unicode Bidi Inspector
Label RTL, LTR, numeric and bidirectional control characters verbatim, showing the logical sequence and warning of hidden directional control codes.
Grapheme Cluster Inspector
Decompose user-visible graphemes according to Intl.Segmenter and list Code Point, UTF-16 Unit and UTF-8 Bytes.
Timezone Transition Explorer
Scans the UTC Offset for the specified IANA time zone and year, listing DST switches, repeat times, and skip times.
Tab Order Auditor
Parse the focusable elements, tabindex and disabled status in HTML, and output the actual tab priority and suspiciously positive tabindex.
Reduced Motion CSS Auditor
Scan Animation, Transition and Scroll Behavior to check if prefers-reduced-motion override is provided.
Touch Target Layout Auditor
Check the width, height and adjacent spacing according to the component measurement list, and output the touch target pass status and correction suggestions.
Keyboard Shortcut Conflict Checker
Formalize cross-platform shortcut keys to identify duplicate bindings, single-key triggers, and common browser or operating system retention combinations.
Testing and Quality Engineering
Pairwise Test Case Generator
Generate streamlined test cases covering all value pairs from parameters and candidate values, with coverage and CSV attached.
Decision Table Validator
Enumerate the condition fields and check the uncovered, overlapping and unhit items of the decision rule, and output the case matrix.
Finite State Machine Simulator
Read states, events and transitions, step through event sequences and find missing transitions, dead states and unreachable states.
Feature Flag Rule Simulator
Simulate Feature Flag hit results and determine trajectories based on user Context, condition priority, and percentage offloading.
Geographic and spatial data
Geojson Canvas Viewer
Parse FeatureCollection, Geometry, and Properties to display Bounds, points, lines, and polygons on an SVG canvas without external tiles.
Gpx Track Analyzer
Parses GPX Track Points, time and altitude, calculates distance, average speed and cumulative climb, and provides a tile-free 2D track preview.
SEO and website optimization
SEO Meta Checker
Paste HTML and instantly analyze SEO elements such as Title, Meta Description, Open Graph, Twitter Card, JSON-LD, etc. Provide SEO scores, improvement suggestions and complete detection reports.
Website SEO Audit
Advanced SEO analysis tool! In addition to Meta tags, it provides a more in-depth analysis of Heading structure, image ALT, link quality, Accessibility, structured data and HTML quality. Provides four major oriented ratings and complete improvement suggestions.
SEO Content Analyzer
Paste the article content and instantly analyze word count, keyword density, readability and content quality. Supports plain text, Markdown and HTML modes, and provides keyword density maps, popular keyword rankings and complete improvement suggestions.
AI Website SEO Checker
An SEO health check tool built specifically for AI-generated websites. Analyze SEO issues that are often missed by AI website builders such as ChatGPT, Claude, and Gemini, and provide AI feature analysis, SEO scores, and improvement suggestions.
Schema Generator
Schema.org JSON-LD tool for dual-mode operation. Fill out forms to automatically generate structured data, or post and analyze existing code for completeness, Google specification compliance, and improvement suggestions. Supports 10 Schema types.
Robots.txt & Sitemap Validator
Professional Robots.txt and Sitemap.xml verification tool! Analyze rule conflicts, format errors, and blocking issues, and provide SEO scores, Error/Warning classification, improvement suggestions, and instant verification. Supports URL pattern and pasted content analysis.
Meta Tag Generator
Quickly generate standard HTML Meta tags! Instant preview of form filling, supporting complete SEO elements such as Title, Description, Open Graph, Twitter Card, Canonical URL, Theme Color, etc. Copy or download with one click.
Open Graph Preview
Instantly simulate Facebook, X, LinkedIn, Discord and general OG cards, check word count and generate complete Meta Tags.
Robots.txt Generator crawler rule generator
Quickly create a robots.txt that complies with search engine specifications. Supports multiple sets of User-agent, Allow/Disallow rules, Sitemap, Crawl-delay, 7 commonly used templates and real-time verification.
Manifest.json Generator PWA manifest generator
Quickly create manifest.json that complies with PWA specifications. Supports complete fields, App Icons, Shortcuts, Screenshots, Categories and instant verification, one-click copy or download.