HTTP Header Viewer
View HTTP response headers for any URL instantly.
Features
Everything you need for HTTP header analysis
Inspect the full set of response headers a URL returns, including caching directives, content type and encoding, security policy headers, and any redirect chain along the way.
Read the status line as sent, so a 301, a 302, and a 200 are distinguishable rather than hidden behind the browser's final rendered page.
See the headers a browser normally consumes silently: Cache-Control, ETag, Content-Encoding, Strict-Transport-Security, and the rest of the response metadata.
About This Tool
When a browser requests a page, the server replies with HTTP response headers, metadata that travels alongside the content. This tool fetches a URL and shows those headers, which control caching, security policy, content type, redirects, and more, none of which is visible in the page itself.
Inspecting headers is essential for debugging: a wrong content-type breaks how a file is handled, a missing security header such as Strict-Transport-Security or Content-Security-Policy weakens protection, and cache-control headers explain why an update is not showing. The viewer surfaces the status code and every header so you can confirm the server is responding as intended.
How to Use It
- Enter the URL to inspect.
- Read the HTTP status code and full response headers.
- Check caching, security, content-type, and redirect headers against what you expect.
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