JSON Formatter
Beautify, validate and minify JSON.
- No login
- No credit card
- 100% free
- Files never leave your device
Free JSON formatter & validator
Paste messy or minified JSON and click Beautify to format it with clean indentation, or Minify to strip whitespace for production. If the JSON is invalid, the tool tells you exactly where the error is.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight, text-based format for storing and exchanging data. It's used by almost every web API. Well-formatted JSON is much easier to read and debug.
Private by default
Your JSON is parsed entirely in your browser — nothing is uploaded, so it's safe to use with sensitive payloads. Need to encode text too? Try our other dev tools.
Frequently asked questions
What does the JSON formatter do?
It beautifies messy JSON with clean indentation, minifies it for production, and validates it — pointing out exactly where any syntax error is.
Is my JSON sent anywhere?
No. It is parsed entirely in your browser, so it is safe to use with private or sensitive data.