How to use this tool
- Paste raw HTTP headers from a request, response, or browser dev tools.
- View parsed headers in a structured list with optional status line.
- Copy the formatted output or clear to start over.
About HTTP Header Parser
This tool helps you inspect HTTP headers when debugging APIs, reviewing webhooks, or analyzing request/response details. It parses standard header format and supports status lines from HTTP responses.
Common use cases
- Inspecting request headers from browser dev tools or network logs
- Parsing webhook payload headers for debugging
- Formatting headers for documentation or API testing
FAQ
- What does the HTTP header parser do?
- It parses raw HTTP header text (Name: Value format) into a structured list. You can paste headers from browser dev tools, curl output, or API logs. It optionally detects HTTP status lines (e.g. HTTP/1.1 200 OK).
- Are my headers sent to a server?
- No, parsing happens entirely in your browser. Your headers are never transmitted.
- How does it handle headers with colons in the value?
- It splits on the first colon only, so values like Date: Wed, 21 Oct 2015 07:28:00 GMT are parsed correctly.
- Can I parse both request and response headers?
- Yes. Paste any header block. If the first line starts with HTTP/, it is treated as a status line; otherwise all lines are parsed as headers.