Free, browser-based utilities for everyday developer workflows

HTTP Headers Parser & Builder

Paste raw headers, edit in a grid, normalize casing, export as JSON/Map, detect duplicates.

  • Paste raw HTTP headers to parse into a grid.
  • Normalize casing, detect duplicates, and export JSON/Map.
  • Perfect for request/response debugging.

Use cases

Parse and Build HTTP Headers

Explore more in the Use cases library.

Raw headers

Headers table

Export

How to use HTTP Headers Parser & Builder

Paste a raw HTTP header block into the parser to see each header name and value displayed in a clean table. Use the builder to compose a header set by adding name/value pairs, then copy the output as a formatted block or JSON map.

Common use cases

Backend developers use this to normalise and inspect headers from proxy logs or load balancer traces. API developers use it to verify correct casing and de-duplication before configuring middleware, and QA engineers use it to build custom header sets for test requests.

Why run this in your browser?

All processing happens locally in your browser. Your data never leaves your machine, making it safe for sensitive payloads, internal API responses, and confidential configurations.