Developer Tools
JSON Formatter
Beautify, minify and validate JSON instantly — all processed privately in your browser.
About the JSON Formatter
A JSON formatter makes messy JSON readable and helps you catch errors fast. Paste your data and beautify it with clean indentation, minify it to a single line, or validate that the syntax is correct.
Crucially, everything happens locally in your browser — your JSON is never sent to any server, which keeps sensitive data private.
How to use the JSON Formatter
- Paste your JSON into the input box.
- Click Beautify, Minify or Validate.
- Copy the formatted result with one click.
How the calculation works
JSON.parse(input) → JSON.stringify with indentation (beautify) or none (minify)
Example
Beautifying {"name":"CalculatorWorld","tools":38} produces a neatly indented, multi-line structure that is easy to scan.
Frequently asked questions
No. All formatting and validation happen entirely in your browser, so your data stays private.
It re-indents your JSON with consistent spacing across multiple lines to make it easy to read.
The tool attempts to parse your JSON and reports the exact error message if the syntax is invalid.
Yes, minify strips all whitespace to produce the smallest single-line version for transport.