JSON Formatter for API Responses

Debugging REST APIs often means staring at dense, unformatted JSON payloads returned from endpoints. This formatter is built for exactly that workflow: paste the raw response body from Postman, cURL, or your browser DevTools and get a cleanly indented, color-coded view in milliseconds. It catches malformed responses instantly, helping you distinguish between a broken API and a broken parser on your end.

JSON Formatter

Format, minify, and validate JSON — instantly, in your browser.

input.json

Indent

0lines0chars0 B
editing

output.json

Your tidy JSON shows up here

Paste some JSON on the left and hit Format. We'll pretty-print and color-code it for you.

awaiting input

How to use JSON Formatter

Paste your raw or minified JSON into the editor on the left (or click the star to load a sample).
Click Format to pretty-print with configurable indentation, Minify to compress whitespace, or Validate to check for syntax errors.
Toggle between Code and Tree view to explore nested objects with collapsible nodes.
If the JSON is invalid, the validity pill pinpoints the line and the error message explains why.
Click Copy to copy the formatted output to your clipboard.

All processing happens entirely in your browser — no data is ever sent to a server.

Related Variations

JSON Formatter for Python JSON Minifier JSON Validator JSON Pretty Print JSON Formatter with Comments JSON Formatter for Large Files JSON Formatter for JavaScript

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JSON Formatter for API Responses

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