Free JSON Formatter Online
Use this free JSON formatter to format, validate, and beautify JSON data. Fast, private, and works directly in your browser.
What is JSON Formatter?
JSON Formatter turns compact or messy JSON into clean, readable, indented data. It helps developers inspect API responses, debug payloads, and share structured data with a team. Validation runs as you format, so syntax errors are easy to spot.
How to use this tool
- Paste your JSON into the input box.
- Choose the indentation size (2 or 4 spaces).
- Click Format JSON to beautify it.
- Copy the output or download it as a file.
Features
- Format JSON with 2 or 4 space indentation
- Validate JSON syntax with clear error messages
- Minify JSON in one click
- Copy the formatted output
- Download the result as a .json file
- Runs entirely in your browser
This tool runs in your browser. Your files and text are not uploaded to our servers, and we do not store your input.
Frequently asked questions
Is this JSON formatter free?+
Yes. It is free to use and does not require an account.
Is my JSON uploaded to a server?+
No. Your JSON is parsed and formatted directly in your browser, so it never leaves your device.
What happens if my JSON is invalid?+
The tool shows a clear error message describing the problem so you can fix the syntax and try again.
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