HTTP Header Checker
FreeInspect HTTP response headers from any URL
About HTTP Header Checker
HTTP response headers govern caching, security, content type, and more, yet they're invisible unless you go digging with curl or dev tools. HTTP Header Checker fetches a URL and shows you the full set of response headers the server returns, so you can verify exactly how a page is being served.
Enter a URL and the tool makes the request and lists every response header in your browser. It is free, requires no signup, and responds in seconds. Use it to confirm security headers are present, to inspect caching directives, or to see the content type and status a server sends before you debug client-side behavior.
Common uses
- Verify security headers like Content-Security-Policy or Strict-Transport-Security are set
- Inspect Cache-Control and ETag headers when debugging caching behavior
- Confirm the Content-Type a server returns for an API or asset
- Check the status code and any custom headers from a CDN or proxy layer
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- Real-time results
- DNS, IP, speed checks
- No setup required
FAQ
Does it show request or response headers?
It shows the response headers the server returns for the URL you submit.
Can it check headers behind authentication?
It fetches publicly reachable URLs, so endpoints requiring login or custom auth headers may not be accessible.
Why do I see headers from a CDN?
If the site sits behind a CDN or proxy, the response you see comes through that layer, which often adds or rewrites headers.
Can I use HTTP Header Checker on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.