TLS Handshake · Free Local Tool

Tls Client Hello Inspector

Parse the Record Version, Cipher Suites, Compression, Extensions, SNI, Supported Versions and ALPN of the TLS ClientHello Hex.

No uploadsMobile-friendlyTheme support

What is the TLS ClientHello viewer?

Parse the Record Version, Cipher Suites, Compression, Extensions, SNI, Supported Versions and ALPN of the TLS ClientHello Hex. ToolHub places the core computing entirely within the browser, allowing immediate use on both desktop and mobile devices, without the need to register an account or send content to the backend.

How to use this tool?

  1. Enter the data according to the field prompts and select the required processing method.
  2. Click "Process Now" to view the results, indicator summary and necessary error messages.
  3. After confirming that the content meets actual needs, you can copy the results or download them into files for further use.

Suitable use cases

Packet capture debugging, TLS compatibility inventory, proxy service testing and protocol teaching. All processing is completed in the current page, which is especially suitable for workflows that do not want to post internal data to remote services.

Interpretation of results and precautions

The tool only parses a single plaintext ClientHello and does not establish a connection, decrypt traffic, or determine server security. Tools will validate basic input formats and provide readable error messages, but production environments should still be reconfirmed against source specifications, business rules, or professional requirements.

Browser and device support

Tls Client Hello Inspector supports current Chrome, Edge, Firefox, and Safari releases. Mobile and desktop layouts use the same validation rules documented on this page.

Frequently Asked Questions

Will the TLS ClientHello viewer upload data to the server?
No. Tool functions are executed directly within the current browser tab, and input and generated results will not be uploaded or saved by ToolHub.
What use cases is the TLS ClientHello viewer suitable for?
Packet capture debugging, TLS compatibility inventory, proxy service testing and protocol teaching
Do I need to install software before using the TLS ClientHello viewer?
No need. Use a desktop or mobile browser that supports modern JavaScript, and no account is required.
What are the limitations of this tool?
The tool only parses a single plaintext ClientHello and does not establish a connection, decrypt traffic, or determine server security.
Is manual inspection required after the results are generated?
Needed. Tools can assist with calculations, conversions, or formatting, but before going online, importing data, or making business decisions, the results should still be reviewed according to actual specifications.

Tls Client Hello Inspector: inputs, output, and reproducible example

Use the free Tls Client Hello Inspector online. Fast, private, mobile-friendly, and processed directly in your browser.

What this page actually processes

FieldControlDefault exampleValidation role
TLS ClientHello HexMultiline text16 03 01 00 62 01 00 00 5e 03 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 13TLS ClientHello Hex is read by the browser as a multiline text value before the tool runs.

Reproduce the built-in example

Start with TLS ClientHello Hex = 16 03 01 00 62 01 00 00 5e 03 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 13, then run Tls Client Hello Inspector. Change one input at a time so the effect on the result remains traceable.

After validating tls clienthello hex, the page displays its result in the output workspace and enables the relevant copy or download action.

When to use it and how to interpret the result

Packet capture debugging, TLS compatibility inventory, proxy service testing and protocol teaching. All processing is completed in the current page, which is especially suitable for workflows that do not want to post internal data to remote services.

Limits and checks before use

The tool only parses a single plaintext ClientHello and does not establish a connection, decrypt traffic, or determine server security. Tools will validate basic input formats and provide readable error messages, but production environments should still be reconfirmed against source specifications, business rules, or professional requirements.

Page verification record

Controls inspected1 documented inputsResult pathValidate → process → review → copy/downloadLast content review2026-09-02