HTTP Header to JSON

Tool Guide

About the Online HTTP Header to JSON Tool

The online HTTP Headers to JSON tool instantly parses raw request/response header text — copied from your browser's dev tools or a packet-capture tool — into a structured JSON object, making it easy to use in scripts, logs, mock configs, or debugging.

It accepts a full raw message (including the request/status line, e.g. `GET /path HTTP/1.1` or `HTTP/1.1 200 OK`), or just the key-value header lines on their own.

Core Features

1. Line-by-line key-value parsing: Automatically splits each header line on its colon and produces the matching JSON key-value pair.

2. HTTP/2 pseudo-header support: Optionally parses the request/status line into HTTP/2-style pseudo-header fields such as `:method`, `:path`, `:status`, and `:protocol`, included alongside the regular headers.

3. Instant local conversion: All parsing happens locally in your browser — nothing is uploaded — and the result updates live as you type.

How to Use

Step 1: Copy the raw Request Headers or Response Headers text from your browser's Network panel (or a packet-capture tool).

Step 2: Paste it into the input box, and toggle HTTP/2 pseudo-header mapping if needed.

Step 3: The matching JSON object appears instantly on the right — click Copy to grab the result.

FAQ

What header text formats are supported?

Standard HTTP/1.1 request and response header text, including an optional leading request or status line.

What are pseudo-headers?

Pseudo-headers are special HTTP/2 fields (prefixed with `:`) used to represent the request method, path, status code, and similar metadata. This tool can convert a traditional request/status line into that format.

Is my header data uploaded anywhere?

No — all parsing happens locally in your browser and nothing is sent to a server.