HTTP & WebLOCALRuns in your browserInput may contain sensitive information
HTTP Header Formatter
Normalize an HTTP header block locally while preserving duplicate fields and order.
This tool handles input and primary processing in your browser and is designed not to send the input to QuickKit’s server.
Avoid live production secrets; use dummy or masked data where possible. Data handling details
How it works
Accepts one header field per line and normalizes line endings and optional whitespace around values. Duplicate fields remain separate; in particular, Set-Cookie fields are never combined. Obsolete folded lines and control characters are rejected. Input is sensitive and never leaves this browser.