Free Online HTTP Header Parser tool icon
Network & debug tools

Free Online HTTP Header Parser

Free online HTTP Header Parser: convert raw HTTP headers into a JSON object or generate raw headers from JSON. Includes a simple Cookie splitter, with everything running locally in your browser.

Raw Headers
Parsed Result
Start Line: -
Cookie parsing
Note: Set-Cookie is split by semicolons only. Cookie attributes are not parsed.

Usage Guide

  • Raw → JSON: Paste raw HTTP Headers into the left box to parse them into a JSON object.
  • JSON → Raw: Enter a valid JSON object (key-value pairs) to generate raw Headers text.
  • Supports parsing Cookie strings into a readable list of key-value pairs.
  • Click 'Copy' to instantly grab the result from the current tab.

Tips

  • This tool runs entirely in your browser; no Headers data (including Cookies/Tokens) is sent to any server.
  • Raw mode intelligently identifies Key-Value structures and handles common line endings.
  • JSON mode automatically handles special character escaping to ensure valid Header format.
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