JSON Formatter
Paste JSON to format, minify, and validate structured data directly in your browser.
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- Your files never leave your device
- Processing happens locally in your browser
- No upload to our servers
- No registration required
JSON Formatter
Format, minify, and validate JSON in your browser.
About this tool
Format, minify, and validate JSON online with a fast client-side JSON formatter.
How it works
Paste your JSON into the input editor.
Use Format to pretty-print valid JSON or Minify to remove extra whitespace.
Read validation errors inline and copy the formatted result when it is ready.
Frequently asked questions
Does the JSON Formatter send data to a server?
No. The JSON Formatter runs in your browser and does not call a backend or external API.
Can I minify JSON with this tool?
Yes. Use the Minify button to turn valid JSON into compact single-line output.
What happens if my JSON is invalid?
The tool shows a readable validation error so you can find and fix the syntax problem.
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