What this tool is for
HTTP Header Parser turns copied request or response headers into structured JSON.
When to use it
Use it when debugging API behavior, cache settings, CORS notes, or support tickets.
What the result means
The result is a JSON object. Repeated headers become arrays.
Use notes
- Paste header lines in name: value form.
- The request/status line is ignored if present.
- Header names are normalized to lowercase.
Privacy and limits
Everything runs in your browser tab. Avoid pasting production secrets, private tokens, customer data, or proprietary code into any online page unless your team policy allows it.