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A browser-based content security policy (csp) generator tool. No data sent to server.

📘 How to Use

  1. Select the external services and settings used on your site via checkboxes.
  2. Enter any additional domains you need to allow in the input field.
  3. Choose the output format for Apache, Nginx, or HTML Meta tag.

Content Security Policy (CSP) Generator

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Content Security Policy (CSP) Generator | Easily Create Headers to Protect Your Site

This tool helps web developers and site administrators generate Content Security Policy (CSP) headers to protect websites from Cross-Site Scripting (XSS) and data injection attacks. Simply select the services and content types your site uses, and it will generate the appropriate, ready-to-use header for your server configuration.

💡 Tool Overview

  • Point-and-Click Configuration: No need to manually write complex CSP rules. Just check the boxes for common services like Google Analytics, Google Fonts, YouTube embeds, and various CDNs.
  • Multiple Server Formats: Generates ready-to-use configuration snippets for Apache (.htaccess), Nginx (nginx.conf), and standard HTML <meta> tags.
  • Custom Domain Support: Easily whitelist your own domains for APIs, asset CDNs, or other external resources by adding them to the custom domains field.
  • Secure by Default: The policy starts with a strict default-src 'self' directive, ensuring that only resources from your own domain are loaded unless you explicitly permit others.

🧐 Frequently Asked Questions

Q. What is a Content Security Policy (CSP)?

A. A Content Security Policy is a web security standard that adds a critical layer of defense against attacks like Cross-Site Scripting (XSS) and data injection. It works by telling the browser which sources are legitimate for loading resources such as scripts, styles, images, and frames. Any resource from an unlisted source is blocked by the browser.

Q. When should I use the 'unsafe-inline' option?

A. The 'unsafe-inline' directive allows the execution of inline <script> tags and style attributes. While it makes CSP implementation easier on existing websites, it reduces the policy's effectiveness against XSS. It's often used as a starting point. For optimal security, the recommended practice is to refactor all inline JavaScript into separate .js files and avoid inline styles.

📚 Technical Insights on CSP Generator

A Content Security Policy is built from a series of directives that control specific resource types. The most fundamental directive is default-src, which serves as a fallback for most other directives if they are not explicitly defined. This tool sets it to 'self', a keyword that restricts loading to resources from the same origin (same scheme, host, and port).

The most critical directives for preventing XSS are script-src and style-src. By carefully controlling where scripts and styles can be loaded from, you significantly reduce the attack surface. This generator populates these and other directives like img-src, font-src, and frame-src based on your selections. For production environments, it is best practice to first deploy a policy using the Content-Security-Policy-Report-Only header. This allows you to monitor for violations via browser console logs or reporting endpoints without actually blocking content, ensuring a smooth and secure rollout.