Inspect and format HTTP headers
Parse HTTP header lines while preserving duplicate fields.
Input & settings
How to use this tool
Paste your source, choose the supported options, then process. Inspect or download the complete result.
Limits and behavior
Optional HTTP status/request start line accepted. Header names normalize to lowercase. Obsolete folded lines and control characters rejected; no network request is made. Maximum total input 1 MB, output 3 MB, JSON nesting 64 levels. Processing stays in your browser worker. Input is limited to 1 MB and output to 3 MB. No input content is saved by CraftAI.
Inspect HTTP response or request headers
Review header names and values from pasted HTTP header text, including duplicated fields.
Does a parsed header prove it came from a real server?
No. This tool reads supplied text and does not independently fetch or authenticate remote responses.
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