Validate JSON syntax with detailed error messages and statistics
JSON to Validate
How to Use
- 1Paste your JSON into the input area
- 2The validator checks your JSON in real time as you type
- 3If invalid, the error panel shows the exact message and line/column number
- 4If valid, click Pretty Print to format it with indentation or Minify to compact it
- 5Click Copy to copy the formatted/minified JSON to your clipboard
Frequently Asked Questions
What makes JSON invalid?
Common JSON errors include: trailing commas after the last item, single quotes instead of double quotes, unquoted keys, missing commas between items, and control characters in strings.
What is JSON pretty printing?
Pretty printing formats compact JSON with newlines and indentation to make it human-readable. This validator uses 2-space indentation, matching the most common coding style.
Does this JSON validator store my data?
No. All validation happens in your browser using JavaScript's built-in JSON.parse(). Your data is never sent to any server.