JSON Formatter & Validator
Paste messy JSON to pretty-print it with proper indentation, minify it, or check whether it's valid. A handy tool for developers and students.
How to use
- Paste your JSON.
- Click Format to beautify or Minify to compress.
- Errors are highlighted so you can fix invalid JSON.
Frequently asked questions
Will it tell me what's wrong?
Yes — if the JSON is invalid, the parser error message is shown to help you fix it.
Is large JSON supported?
Yes, limited only by your device's memory since it runs locally.