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Content-Security-Policy (CSP) Builder

Interactively construct, customize, and validate advanced Content-Security-Policy strings for enterprise web applications.

Policy Directives

Security Directives & Flags

Builder Output

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The Content-Security-Policy header restricts resources (like JavaScript, CSS, Images) that the browser is allowed to load for a given page.

CSP Builder Guidelines

  • Zero Trust Architecture: Always specify strict fallbacks via `default-src` to ensure unlisted directives default securely.
  • Mitigating Clickjacking: Utilizing `frame-ancestors 'none'` or `'self'` prevents your application from being embedded maliciously within external iframes.
  • Reporting Violations: Consider integrating a `report-uri` or `report-to` directive to asynchronously audit policy violations in production environments.

What is Content-Security-Policy (CSP) Builder?

Content-Security-Policy (CSP) Builder is a browser-based utility for security-focused developer work. It helps you transform, inspect, generate, or evaluate the relevant input without installing a separate desktop tool.

How to use this tool

Enter or paste the required input, select the available options, then review the generated result before copying or applying it in your project. Check the output in its real target environment when accuracy matters.

Frequently Asked Questions (FAQ)

Yes. This tool is designed to process the values you enter in your browser.

Review the output for the target syntax and test it in the application, browser, API, or workflow where it will be used.