About the JSON Validator
Find out instantly whether JSON is valid and, if not, exactly where it breaks. The validator shows the failing line with surrounding context so typical mistakes — trailing commas, single quotes, unquoted keys, missing brackets — are easy to fix.
Your data is processed in the browser and never sent to a server, so it is safe to paste payloads that contain tokens or personal data.
How to use it
- Paste the JSON.
- Read the result: a green summary or a red error with location.
- Fix the highlighted line and re-check.
Good to know
- Validation follows the strict JSON standard (RFC 8259). JSON5 or JavaScript object syntax is rejected.
- This checks syntax, not a JSON Schema.