API Response Formatter
Paste any raw API response. Auto-detects JSON or XML and prettifies for readability. Everything runs in your browser.
What is the API Response Formatter?
The API Response Formatter auto-detects whether a pasted response body is JSON, XML or plain text, then pretty-prints it with syntax highlighting. One paste — no switching between separate formatters.
Auto-detection is convenient when a response comes from logs, a browser network panel or a command-line request without a trustworthy content-type header. Structural errors are reported so truncated JSON and malformed XML can be distinguished from valid but unexpected data.
Processing is client-side, so production responses containing tokens or user data stay on your machine.
How to use the API Response Formatter
- 1Paste the raw response body into the input area.
- 2Let the tool auto-detect the type, or force one with the dropdown.
- 3Adjust indentation, then copy or download the formatted output.
When to use the API Response Formatter
- Pretty-print a compressed JSON response copied from a browser network panel.
- Inspect XML returned by a legacy SOAP or integration endpoint.
- Identify a truncated or structurally invalid response captured in application logs.
- Download a readable response body for an issue report without changing its data.
Key features
- Auto-detection of JSON and XML
- Syntax highlighting on the output
- Reports common structural errors
- Copy and download buttons
Important notes
- Formatting does not redact secrets. Remove access tokens, credentials and unnecessary personal data before sharing the formatted result.
- Very large bodies depend on available browser memory and may make syntax highlighting slower even when parsing succeeds.
Frequently asked questions
What formats are supported?
JSON, XML and plain text.
Can it handle very large responses?
Yes — multi-megabyte payloads work on desktop browsers.
What happens if auto-detection chooses the wrong type?
Use the format dropdown to force JSON, XML or plain text, then format again.
Does it send a request to an API?
No. This tool formats an existing response body. Use the API Tester when you need to make the HTTP request itself.
Does formatting change the response values?
It changes presentation and indentation, not the parsed JSON or XML values. Plain text is displayed as supplied.
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