JSON Formatter
Free online JSON formatter — beautify, validate and minify JSON in one click. Everything runs locally in your browser.
Input JSON
Output
How it works
- Paste or type your JSON into the input box.
- Click Format to beautify, Minify to compress, or Validate to check for errors.
- Copy the result with one click.
Features
- Beautify, minify and validate in one click
- Clear error messages with position details
- 100% client-side — your data never leaves the browser
- Syntax highlighting for easy reading
FAQ
Is this JSON formatter free?
Yes, it is completely free with no signup and no usage limits.
Is my data safe?
Yes. All formatting and validation runs locally in your browser — nothing is uploaded to our servers.
Does it support comments or JSON5?
No. The tool validates strict JSON (RFC 8259): comments and trailing commas are not allowed, and the error message will point to the exact position.
Can it handle large JSON documents?
Yes, modern browsers handle JSON documents of several megabytes smoothly with this tool.
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