What is CSP Header Generator?
The CSP Header Generator helps web developers construct, validate, and customize Content Security Policy (CSP) HTTP headers to protect applications against Cross-Site Scripting (XSS) and data injection attacks.
Configure script-src, style-src, img-src, connect-src, and frame-ancestors directives with easy toggles and copy formatted Nginx, Apache, or Vercel header configs.
CSP Directive Settings
HTTP Response Header
Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline' https:; style-src 'self' 'unsafe-inline' https:; img-src 'self' data: https:;
HTML Meta Tag
<meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self' 'unsafe-inline' https:; style-src 'self' 'unsafe-inline' https:; img-src 'self' data: https:;">
Frequently Asked Questions
What is a Content Security Policy (CSP)?
CSP is an HTTP response header that restricts the resources (scripts, images, stylesheets) the browser is allowed to load.
How does CSP prevent XSS attacks?
By disabling inline scripts and restricting trusted script domains, CSP stops attackers from executing malicious scripts.
What is Content-Security-Policy-Report-Only mode?
Report-Only mode logs policy violations to a reporting URL without blocking resource execution, ideal for testing.
How to use CSP Header Generator
To generate CSP headers:
- Select target directive policies (default-src, script-src, style-src, img-src).
- Add trusted domain origins or enable nonce/hash options.
- Copy generated HTTP Header string or web server configuration block.