How to use this developer tool
- Paste or upload the expected source text.
- Review any options shown below the input.
- Select Parse CSP or press Ctrl/Cmd + Enter.
- Check the notes, then copy or download the output.
Content Security Policy Parser
Parse a Content-Security-Policy header into directives and source tokens. The output distinguishes flag-style directives from directives with values, flags duplicates, and highlights several common policy concerns such as missing default-src or permissive script sources. It performs a static text review only; it does not prove that a policy is safe for a particular application or account for headers delivered on other responses.
Developer Input
CSP policyAd space
What this developer tool does
Content Security Policy Parser turns the entered source into a structured or generated result that can be inspected before use.
Splits semicolon-delimited directives, normalizes directive names, preserves source token order, and runs conservative lint checks.
Input stays in this browser tab. Always remove live secrets before sharing screenshots or downloaded results.
Example
Input
default-src 'self'; script-src 'self' https://cdn.example.com 'nonce-abc123'; img-src 'self' data:; object-src 'none'; upgrade-insecure-requests
Running the sample produces output that reflects the parsed fields and reports any unsupported or security-sensitive detail.
Use cases
- Translate copied API documentation into project code.
- Inspect request, response, or header configuration during debugging.
- Create a reviewable draft for tests and documentation.
- Spot malformed, duplicate, or overly broad values before deployment.
Tips for reliable output
- Remove real tokens, cookies, and API keys before pasting.
- Keep quoted values intact when copying shell commands.
- Read warnings instead of assuming every option was converted.
- Test generated code against a staging endpoint first.
- Review browser and server security rules separately.
Processing details
Splits semicolon-delimited directives, normalizes directive names, preserves source token order, and runs conservative lint checks. Processing is deterministic except where cryptographic random values are intentionally generated.
This browser tool does not execute remote requests, expand shell variables, inspect server behavior, or replace application-specific security review.
Frequently asked questions
Does Content Security Policy Parser send my input to a server?
No. Processing runs in the browser and the page does not transmit the entered text.
What input does Content Security Policy Parser support?
Paste a CSP header value using the syntax shown in the sample.
Can I use the generated output in production?
Use it as a reviewed starting point. Environment-specific security, authentication, and error handling still need verification.
Why might Content Security Policy Parser report a limitation?
The parser handles documented common syntax and reports constructs that would require shell, browser, or server context.
How can I verify the Content Security Policy Parser result?
Compare the parsed URL, headers, body, directives, or origins with the source and test the final configuration in a non-production environment.
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Output fields
| Field | Meaning |
|---|---|
| Output | Generated or parsed text |
| Summary | Counts and completion state |
| Notes | Warnings and review guidance |
HTTP & Security Headers
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