JSON Formatter
Paste JSON to validate it and get a clean, indented, readable copy — a free online JSON formatter and beautifier.
Paste your JSON
Formatted output
This runs entirely in your browser — your JSON is never sent to our server.
What is the JSON Formatter?
This JSON formatter and validator takes any JSON text and re-prints it with consistent indentation, making it easy to read and spot structural mistakes. Use it to format minified JSON from an API response, validate a config file, or beautify JSON before sharing it with a teammate. If the JSON is invalid, it shows the exact parsing error instead of a formatted result, so you know precisely what to fix.
How to use the JSON Formatter
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1
Paste your JSON into the left box.
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2
The formatted, indented version appears on the right instantly — or an error message if it isn't valid JSON.
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3
Click Copy to copy the formatted result to your clipboard.
Common questions
How do I format or beautify JSON online?
Paste your raw or minified JSON into the box — it is reformatted with consistent indentation instantly, no upload or installation needed.
How do I validate JSON and find syntax errors?
Paste your JSON in — if it's invalid, the tool shows the exact parsing error your browser's JSON engine reports, so you can jump straight to the problem instead of scanning line by line.
Is my JSON uploaded anywhere?
No — parsing and formatting both happen locally using your browser's built-in JSON support. Nothing is sent to our server.
Why does it say my JSON is invalid?
The error message shown is the exact error your browser's JSON parser reports — usually a missing comma, an unquoted key, or a trailing comma is the cause.
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