JSON Validator
Validate JSON with precise error locations.
Processed locally in your browser — your files never leave your device.
Input is parsed only — never executed as code.
How to use
- 1Paste the text to validate.
- 2Click Validate and read the verdict.
Check whether text is valid JSON. Errors report the message plus line and column numbers. JSON is only parsed — never executed.
Frequently asked questions
Is validation safe?
Yes. Input is parsed with JSON.parse only; nothing is ever executed as code.
Is my data uploaded?
No. Validation happens entirely in your browser.