Request Header Viewer
FreeInspect HTTP request headers sent by your browser
About Request Header Viewer
Every request your browser sends carries a stack of HTTP headers, and they affect everything from content negotiation to caching to how a server identifies your client. The Request Header Viewer shows you exactly which headers your browser is sending right now, so you can see your real User-Agent, Accept values, and other fields without guessing.
Open the tool and it reports the headers attached to your request, laid out so they're easy to scan. There's no setup, no signup, and nothing leaves your browser beyond the normal request itself. It's a simple way to understand what your client transmits, which is invaluable when you're debugging why a server treats your requests differently than you expect or building logic that reacts to specific header values.
Common uses
- Read your exact User-Agent string to reproduce a client-specific bug on the server.
- Check the Accept and Accept-Language headers your browser sends during content-negotiation work.
- Confirm which headers reach a server when debugging a caching or compression issue.
- Teach yourself how real HTTP requests are structured by seeing live header values.
- Verify that your browser isn't adding an unexpected header that breaks an API.
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?
- Test APIs instantly
- No Postman needed
- Full header control
FAQ
Whose headers am I seeing?
You see the HTTP request headers your own browser sends, reflecting your current client and its configuration.
Can I view response headers too?
This tool focuses on the request headers your browser transmits rather than the headers a server sends back.
Why does my User-Agent look different from another browser's?
Each browser and version sends its own User-Agent. Seeing yours helps you understand how servers identify your client.
Is any information collected?
The tool simply displays your request headers in the browser and isn't built to store or transmit them elsewhere.
Can I use Request Header Viewer on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.