JSON Formatter & Validator
Paste your JSON to format, beautify, minify, or validate it. Errors are reported with approximate line and column information.
How to use this tool
- Paste your JSON into the input area, or click Load Sample.
- Click Format / Beautify to pretty-print with indentation.
- Click Minify to compress to a single line.
- Click Validate to check if the JSON is valid.
- Click Copy Output to copy the result.
This tool uses the browser's built-in JSON.parse() and JSON.stringify(). Input is never executed as JavaScript — it is only parsed as data. No JSON content is sent to an external server.
Frequently asked questions
This tool supports standard JSON as defined by the JSON specification (RFC 8259). Objects, arrays, strings, numbers, booleans, and null are all supported. Comments and trailing commas are not valid JSON and will produce errors.
No. All parsing and formatting happens entirely in your browser. Your JSON data never leaves your device.