Developer Tools

Content Security Policy Builder

Build a Content-Security-Policy header from source directives and optional insecure-request upgrading settings.

Before You Use

Security, encoding, token, and network outputs are workflow references. Do not enter passwords, private keys, production tokens, or real vulnerability details; verify against official security guidance.

ToolRuns in the browser

Content Security Policy Builder working example

Build a Content-Security-Policy header from source directives and optional insecure-request upgrading settings.

Runs in your browser

Sample input

Example input for Content Security Policy Builder
Content Security Policy Builder source
value: API response, config snippet, URL, token sample, or log fragment
check: structure, encoding, delimiter, or copy-safe output
Check before running: Replace production secrets with demo values before testing.

Sample result

Example Content Security Policy Builder result
Developer result
- Cleaned or transformed value
- Validation note or error location
- Copy-ready output for the next tool
Next step: validate the cleaned value, copy it, or open a related converter

The interactive tool loads in this area when JavaScript is enabled.

How to use Content Security Policy Builder

Common uses include Draft CSP headers, Review allowed asset origins, Prepare a policy before testing.

Open Content Security Policy Builder and paste the code, data, URL, token, or file sample you want to check.
Choose the parsing, formatting, encoding, or validation option that matches the source format. Focus first on Draft CSP headers.
Run the tool and compare the output with your original snippet or technical requirement. Use the next pass to Prepare a policy before testing.
Copy the cleaned result, transformed value, or diagnostic note when it is ready for Review allowed asset origins.

Useful for

Draft CSP headers
Review allowed asset origins
Prepare a policy before testing

Common issues

The parser reports a syntax error.

Check quotes, commas, brackets, delimiter choice, and escaped characters before copying the result.

The copied value breaks in another tool.

Compare encoding, line endings, field order, and required format rules in the target service.

How to interpret the result

Use the output as a technical checkpoint and compare it with the original snippet before adding it to code, docs, or an API request.

Related workflow

Next path: Content Security Policy Builder -> Conventional Commit Builder -> CORS Header Generator. Keep the original input nearby so you can compare each result before using it elsewhere.

Privacy and review notes

This tool is designed to process inputs in the browser where the workflow allows it. Document and legal-reference outputs are drafts or helpers, not legal advice or official filing confirmation. Use non-sensitive examples and review the output before sharing or submitting it.

Basis and limitations

Basis

The tool transforms or checks user-provided strings, tokens, hashes, encoded values, or network-format data in the browser.
Security-related pages are workflow references for development and learning, not production security validation.

Limitations

Do not enter real passwords, private keys, production tokens, customer data, or sensitive vulnerability details.
A hash, token, encoding, or network result does not prove security strength or compromise status.

Official check

For production security decisions, verify against organizational policy, official documentation, and professional security review.

References and methodology

Official external source: OWASP Cheat Sheet Series — Practical implementation and verification guidance for web security.

Review scope: We automatically check that the calculation basis and official source links are shown. No licensed medical, legal, or tax professional has reviewed this result individually, so confirm with the responsible agency or a professional before an important decision.