JSON Validator

Validate JSON Syntax

How to Use

  1. Paste your JSON code into the editor.
  2. The tool automatically checks for errors.
  3. Look for red 'x' markers in the gutter for specific syntax issues.
  4. Click 'Format' to beautify the code and make it readable.

Key Features & Benefits

  • Real-time syntax checking.
  • Clear error messages with line numbers.
  • Strict RFC compliance.
  • Works offline in your browser.

Frequently Asked Questions

Why is my JSON invalid?
Common errors include trailing commas, single quotes (JSON requires double quotes), or missing brackets. Our tool highlights these specific issues.
Is my data sent to a server?
No. All validation happens locally in your browser's JavaScript engine. Your data never leaves your computer.