JSON Formatter & Validator
Beautify, minify and validate JSON with exact error positions.
How to use
- Paste or type JSON on the left — it validates as you type.
- Choose indentation and click Format, or Minify to compress it.
- Errors show the line and column so you can fix them fast.
FAQ
Is my JSON sent to a server?
No. Everything runs in your browser.
Why is my JSON invalid?
Common causes: trailing commas, single quotes instead of double quotes, or unquoted keys.