JSON Validator

Free online JSON Validator. No sign-up needed, and it runs in your browser.

Processed on your device

Check if your JSON is valid as you type. See the exact line and column of any error, and fix common mistakes in one click.

The one-click fix handles the usual problems: trailing commas, single quotes, comments, unquoted keys, and Python-style True / False / None.

How to use

  1. Add your text or file.
  2. Adjust the options if needed.
  3. Copy or download the result.