What is an HTTP header checker?

An HTTP header checker fetches a URL and displays all response headers the server sends (e.g. Content-Type, Cache-Control, Set-Cookie). It helps with debugging and security review.

Is the header checker free?

Yes. This header checker is free to use with no signup required. Rate limits apply to prevent abuse.

Free Tool

HTTP Header Checker

View all response headers returned by a URL. Enter a URL below and click Check.

Use this free header checker to inspect HTTP response headers for any public URL. It’s useful for debugging caching, CORS, content types, and security-related headers. No account or signup required.

Frequently asked questions

What is an HTTP header checker?: An HTTP header checker fetches a URL and displays all response headers the server sends (e.g. Content-Type, Cache-Control, Set-Cookie). It helps with debugging and security review.
Is the header checker free?: Yes. This header checker is free to use with no signup required. Rate limits apply to prevent abuse.