API Response Formatter
Make raw API output readable. Paste a response body — or the full output of curl -i with status line and headers — and the formatter detects whether it's JSON, XML, YAML or form-encoded, pretty-prints it, and lists the headers, all without sending it anywhere.
Paste the response. If it starts with an HTTP status line, the status and headers are separated from the body. The body's format is detected automatically: JSON is pretty-printed, XML indented, and YAML or form data converted to JSON. Nearly-JSON bodies with syntax errors show the exact error location.
Zero Server Uploads
Files process in local RAM
Instant WASM Speed
No waiting queues or lags
Unlimited Batching
Convert files without limits
Suggest a Feature or Improvement for API Response Formatter
Need custom options, higher limits, or extra format support? Let our engineering team know!
How to use API Response Formatter
- 1Paste the raw response (body only, or with headers).
- 2Check the detected format and status.
- 3Read the formatted body.
- 4Copy it.
Why format locally
API responses often contain access tokens, personal data or internal IDs. Pasting them into random online formatters can leak them. This formatter runs entirely in your browser.
Get a full response with headers using curl -i https://api.example.com/…, or copy it from your browser's DevTools Network tab.
Related tools
Decode tokens in responses with the JWT Decoder, validate JSON strictly with the JSON Validator, and inspect a live URL's headers with the HTTP Header Checker.
Frequently Asked Questions
Can it call the API for me?
No — paste the response you already have. To see a URL's headers, use the HTTP Header Checker.
Is my code or data uploaded?
No. Everything runs in your browser; nothing you paste is sent to a server or stored.