Converters
JSON Validator
Validate JSON syntax with detailed error messages including line and column numbers.
About the JSON Validator
A single misplaced character breaks an entire JSON document, and most runtime errors report only that parsing failed — not where.
This validator checks syntax and reports the exact line and column of the first problem, so you can go straight to it.
How to use the JSON Validator
- Paste the JSON you want to check.
- Read the verdict: valid, or an error with a position.
- Jump to the reported line. The real mistake is usually on that line or the one immediately above it.
- Fix and re-validate until the document passes.