Website security · Browser native computing · Free Local Tool

CSP Header Generator

Establish content security policies such as default-src, script-src, style-src, img-src, etc.

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Complete guide to using the CSP Security Header Generator

Establish content security policies such as default-src, script-src, style-src, img-src, etc. The tool does not require registration or package installation, and is suitable for completing work quickly on desktop and mobile browsers.

Recommended operating procedures

  1. First prepare data according to field descriptions and use sample values to confirm the expected format.
  2. After adjusting the options, perform processing and read the statistics and error messages in the result area.
  3. Check representative information before copying or downloading, and retain the original version for official use.

Applicable situations and practical suggestions

Common uses include reducing XSS risks, deploying security headers, and Report-Only testing. CSPs should first observe the actual resources as Report-Only, as direct forcing may block necessary functionality.

Privacy and Compliance

All input and calculations remain local to the browser and are not uploaded to the ToolHub servers. It is recommended to use the latest version of Chrome, Edge, Firefox or Safari; when it comes to target platform specifications, final verification still needs to be completed in the actual environment.

Frequently Asked Questions

What problem does the CSP security header generator solve?
Establish content security policies such as default-src, script-src, style-src, img-src, etc.
How to use the CSP security header generator?
First enter the data and adjust the options according to the field prompts, click "Process Now" to check the results and statistical information, and then use the copy or download function to carry it to the subsequent process.
What are the considerations for the results of the CSP security header generator?
CSPs should first observe the actual resources as Report-Only, as direct forcing may block necessary functionality.
Will the input data be uploaded to the server?
No. Tool computing is completed entirely in the current browser, and ToolHub does not receive, store or transmit your input.
What scenarios are suitable for using the CSP security header generator?
Common uses include reducing XSS risks, deploying security headers, and Report-Only testing. Before formal application, it is recommended to use representative boundary data to verify again.

CSP Header Generator: inputs, output, and reproducible example

Use the free CSP Header Generator online. Fast, private, mobile-friendly, and processed directly in your browser.

What this page actually processes

FieldControlDefault exampleValidation role
default-srcText'self'default-src is read by the browser as a text value before the tool runs.
script-srcText'self' https://cdn.example.comscript-src is read by the browser as a text value before the tool runs.
style-srcText'self' 'unsafe-inline'style-src is read by the browser as a text value before the tool runs.
img-srcText'self' data: https:img-src is read by the browser as a text value before the tool runs.
connect-srcText'self' https://api.example.comconnect-src is read by the browser as a text value before the tool runs.
font-srcText'self' https://fonts.gstatic.comfont-src is read by the browser as a text value before the tool runs.
frame-ancestorsText'none'frame-ancestors is read by the browser as a text value before the tool runs.
Upgrade all HTTP resourcesToggleEnabledUpgrade all HTTP resources is read by the browser as a toggle value before the tool runs.
Use Report-OnlyToggleDisabledUse Report-Only is read by the browser as a toggle value before the tool runs.

Reproduce the built-in example

Start with default-src = 'self'; script-src = 'self' https://cdn.example.com; style-src = 'self' 'unsafe-inline'; img-src = 'self' data: https:; connect-src = 'self' https://api.example.com, then run CSP Header Generator. Change one input at a time so the effect on the result remains traceable.

After validating default-src, script-src, style-src, img-src, connect-src, 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

CSP Header Generator is intended for workflows involving default-src, script-src, style-src, img-src, connect-src.

Limits and checks before use

CSP Header Generator follows the validation rules documented on this page. Confirm units, source formats, and target-system requirements before production use.

Page verification record

Controls inspected9 documented inputsResult pathValidate → process → review → copy/downloadLast content review2026-09-02