HTTP Headers Parser
Parse raw HTTP request or response headers into clean JSON.
Three steps, no reading required.
Paste your input
Drop text, code, or data into the input pane — from an API response, a file, anywhere.
See it process
The result updates instantly as you type.
Copy the result
Grab the output with Copy or Download, or fix the error shown if the input is invalid.
Try it with a sample.
HTTP/1.1 200 OK Content-Type: application/json Cache-Control: no-cache Set-Cookie: a=1 Set-Cookie: b=2
Upload & hope
- Sends your input to a server to process it
- Asks for an account after a few free uses
- Limits input size on the free tier
Runs where you are
- Processes everything inside your browser tab
- No account, ever
- No artificial size limit
Questions worth answering upfront.
No. Parsing runs entirely in your browser. Your headers — which may contain tokens or cookies — never leave your device.
Yes. A request line (GET /path HTTP/1.1) or status line (HTTP/1.1 200 OK), if present, is kept under the _startLine key, and the rest are parsed as headers.
Repeated headers with the same name, like Set-Cookie, are collapsed into a JSON array in the order they appeared.
Yes. Every tool on DevUtilsNow is free to use with no account required.
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