Developer Tools tool
JSON Formatter & Validator
Format, beautify, and validate JSON data with syntax highlighting and error detection.
Format, beautify, minify, and validate JSON data online with instant error detection. Free browser-based JSON tool for developers.
Why people use this tool
JSON Formatter & Validator helps developers quickly format messy JSON, catch syntax errors, and minify data for production use — all without leaving the browser.
- Beautify unformatted API responses or config files for easier reading.
- Validate JSON payloads before sending them to an API or database.
- Minify JSON data to reduce payload size for production deployments.
How to use it
- 1Paste your JSON data into the input area.
- 2Click Format to beautify or Minify to compress the output.
- 3Copy the formatted result into your code, config, or documentation.
FAQ
Helpful answersWhat does a JSON formatter do?
A JSON formatter takes raw or minified JSON and adds proper indentation and line breaks so the data is easier to read, debug, and edit.
Will this tool detect JSON errors?
Yes. If your JSON has syntax errors like missing brackets, extra commas, or unquoted keys, the tool will show you the specific error message.
Is my data safe?
Yes. All processing happens in your browser. No data is sent to any server.