CSP & Security Header Builder

Compose a Content-Security-Policy + HSTS, X-Frame-Options & more — copy as nginx, Apache or a meta tag.

Compose a Content-Security-Policy + HSTS, X-Frame-Options & more — copy as nginx, Apache or a meta tag. Free and 100% private — runs entirely in your browser, nothing is ever uploaded.

About CSP & Security Header Builder

CSP & Security Header Builder is a free, browser-based developer utility that lets you compose a Content-Security-Policy + HSTS, X-Frame-Options & more — copy as nginx, Apache or a meta tag. Because it runs entirely on your device, there’s nothing to install, no account to create, and your data is never uploaded to a server.

How to use CSP & Security Header Builder

  1. Open CSP & Security Header Builder — it loads in any modern browser, with no sign-up.
  2. Paste or type your input.
  3. Get the result instantly, processed locally on your device.
  4. Copy or download the output — what you entered is never sent anywhere.

Frequently asked questions

Is CSP & Security Header Builder free?
Yes — CSP & Security Header Builder is completely free, with no account, sign-up or usage limits.
Is my data private?
Yes. CSP & Security Header Builder runs 100% in your browser, so your files and text are processed on your own device and never uploaded.
Do I need to install anything?
No — CSP & Security Header Builder works in any modern desktop or mobile browser with nothing to download.