API Response Formatter
Runs in browserFormat API responses with JSON, headers, and raw tabs.
Format and inspect API responses with tabs for Body, Headers, and Raw. Status badge, formatted JSON output, and one-click copy. All in your browser.
API Response Formatter tool
200 OK
Formatted JSON
🔒 Runs in your browser · No uploads · Your data never leaves your device
How to use
Enter status code
Type the HTTP status code (e.g. 200, 404, 500).
Paste body and headers
Paste the response body (JSON) and raw headers into the inputs.
Switch tabs
Use Body, Headers, and Raw tabs to inspect different parts of the response.
Copy
Copy formatted JSON, headers as JSON, or the full raw response.
Common use cases
- Inspecting a saved API response — Paste a response body, headers, and status code to get a formatted view of all three when reviewing responses offline.
- Sharing a formatted API response with a teammate — Format raw API output into readable JSON and structured headers before pasting into a bug report or PR description.
Examples
200 JSON response
Format a successful API response.
OutputHTTP/1.1 200 OK Content-Type: application/json {"id": 1, "name": "Alice"}
Frequently asked questions
- Does this send any requests?
- No. This tool only formats the response data you paste — no network requests are made.
- What if my body isn't valid JSON?
- The Body tab will show a warning and display the raw body as-is.
Key concepts
- Status code
- A 3-digit number in an HTTP response indicating the result — 2xx for success, 4xx for client errors, 5xx for server errors.
- Response body
- The payload of an HTTP response — typically JSON, HTML, or plain text — containing the requested data or error details.
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