How to use HTTP Header Checker
- Type or paste your text into HTTP Header Checker's input area.
- Use the Paste raw HTTP response headers setting to control the result.
- The result is computed live in your browser as you edit the input.
- When it looks right, Copy to save it.
About this tool
Everything HTTP Header Checker does happens on your own device. HTTP Header Checker is a free HTTP & Header Tools utility that runs in your browser, doing its work on the input you provide without a backend.
It is designed to do one job well and stay out of your way. No data is sent anywhere, so it stays fast and private by default.
Frequently asked questions
What does HTTP Header Checker do?
Use HTTP Header Checker to check your input without installing anything using the Paste raw HTTP response headers control; everything happens client-side.
Does HTTP Header Checker cost anything?
No — HTTP Header Checker is completely free, with no sign-up and no hidden limits.
Is my input private in HTTP Header Checker?
Yes — your input never leaves your device; HTTP Header Checker does all the work in your browser.
Can I use HTTP Header Checker without a connection?
Yes — after the first load HTTP Header Checker runs entirely offline.