JSON Formatter
Pretty-print, minify and validate JSON.
🔒 Processed on your device — nothing is uploaded.
About the JSON Formatter
JSON from APIs and log files is often squashed onto one line or broken by a stray comma. Paste it here to pretty-print it with your choice of indentation, minify it, sort keys alphabetically, and see exactly which line and column an error is on.
When to use it
- Reading API responses while developing or debugging
- Finding the missing comma or bracket in a config file
- Minifying JSON before sending or storing it
- Sorting keys to compare two JSON objects
Tips for the best results
- JSON keys and strings must use double quotes, not single quotes
- Trailing commas are not allowed in standard JSON
- Your data never leaves the page, so it is safe for tokens and private payloads
How to use the JSON Formatter
- Paste your input into the JSON Formatter.
- The output is generated instantly in your browser.
- Copy or download the result.
JSON Formatter FAQ
Is the JSON Formatter free?
Yes. The JSON Formatter is completely free with no sign-up, no daily limit and no watermark.
Is it safe to use the JSON Formatter with private files?
Yes. The JSON Formatter runs entirely inside your web browser, so your files and text are never uploaded to any server.
Does the JSON Formatter work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.
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