Secure CSP Header Generator – Online csp generator Tool

Build secure Content Security Policy (CSP) headers.

CSP Directives

Fallback for other directives
Allowed sources for scripts
Allowed sources for stylesheets
Allowed sources for images
Allowed sources for fetch/XHR
Allowed sources for fonts
Allowed sources for iframes

Generated Header

default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; connect-src 'self'; font-src 'self'; frame-src 'none'

How to use

Content-Security-Policy: default-src 'self'; script-src...

Add this to your HTTP response headers or as a <meta> tag in your <head>.

Strengthen Your Web Security with CSP

Content Security Policy (CSP) is one of the most powerful tools in a developer's arsenal for preventing Cross-Site Scripting (XSS) and clickjacking attacks. By explicitly defining which domains are allowed to load scripts, styles, and images, you can render many common web vulnerabilities completely ineffective.

Directive Best Practices

  • Start Strict: Use default-src 'self' to block everything by default, then add specific exceptions.
  • Avoid 'unsafe-inline': If possible, avoid inline scripts and styles, as these are common entry points for XSS.
  • Limit Sources: Only allow trusted CDNs and domains that you absolutely need.

Interactive Helper

Our CSP Header Generator simplifies the complex syntax of security policies. As you modify the directives in the editor, the header string is updated in real-time. This allows you to experiment with different configurations and see the resulting policy immediately, all within the safety of your own browser.

Frequently Asked Questions

Content Security Policy (CSP) is an added layer of security that helps to detect and mitigate certain types of attacks, including Cross-Site Scripting (XSS) and data injection attacks.
You can add this header to your server configuration (Nginx, Apache) or as a <meta> tag in your HTML. It tells the browser which resources are allowed to load.
'self' allows resources to be loaded from the same origin (same domain, protocol, and port) as the document itself.

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