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Made withby Shashank Dubey

© 2026 Shashank Dubey. All rights reserved.

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HTTP Header Parser

Parse raw HTTP headers into structured JSON and surface duplicate header names clearly.

Quick context
  • Runs entirely client-side with no server dependency.
  • Built for copy-paste workflows and fast iteration.
  • Optimized for desktop and mobile editing sessions.
httpheadersrequests

Raw header input

Paste one header per line using Header-Name: value format.

Header lines
8
Unique names
7
Duplicates
1
Duplicate header names are grouped into arrays in JSON output.
Normalized headers
Host
api.devtoolbox.app
Accept
application/json
Content-Type
application/json
Authorization
Bearer devtoolbox-token
X-Forwarded-For
203.0.113.10
Cache-Control
no-cache
Set-Cookie
session=abc123; Path=/; HttpOnly
Set-Cookie
theme=dark; Path=/

Header object JSON

Duplicate headers are collected into arrays when needed.

Parsed header object

Structured header output is useful for request builders, tests, and mocks.