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JSON Formatter
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Free online JSON formatter and beautifier
This JSON formatter takes minified, compressed or messy JSON and pretty-prints it with clean, consistent indentation so you can actually read it. Paste any JSON - an API response, a config file, a log entry - choose 2 spaces, 4 spaces or tabs, and hit Format. The tool runs entirely in your browser with plain JavaScript, so your data is never uploaded to a server.
Why format JSON?
JSON (JavaScript Object Notation) is the standard data format for REST APIs, configuration files and data interchange. Servers usually send it minified to save bandwidth, which makes deeply nested objects nearly impossible to scan by eye. A JSON beautifier restores structure: each key on its own line, nesting shown through indentation, arrays expanded. That makes debugging API payloads, reviewing webhook bodies and editing config files dramatically faster.
How to pretty-print JSON online
- Paste your raw or minified JSON into the input box above.
- Pick your preferred indentation - 2 spaces is the most common convention.
- Click Format. If your JSON has a syntax error, the tool shows you the exact problem instead of silently failing.
- Click Copy to grab the formatted result.
Is it safe to paste sensitive JSON here?
Yes. Unlike many online JSON viewers, this formatter performs no network requests with your data. Parsing and formatting happen locally via the browser's native JSON.parse and JSON.stringify, so API keys, tokens and personal data stay on your machine. Need the opposite? Use theJSON minifier to compress JSON, or theJSON validator for detailed error checking.