Processed in your browser
JSON Validator Online
Paste JSON to check whether it is valid and see syntax errors quickly.
Paste JSON to validate.
Output appears here.
Why use JSON Validator?
- Format, validate, encode, or decode text directly in your browser.
- Keep common developer utilities available without opening a heavy editor or separate app.
- Use clear error messages to fix malformed data faster.
Common use cases
API debuggingData cleanupEncoding checksReadable code review
How to use JSON Validator
1
Paste JSON.
2
Run validation.
3
Fix any syntax errors shown.
Frequently Asked Questions
Is my JSON private?
Yes. Validation runs locally in your browser.
Can it validate JSON arrays?
Yes. Objects, arrays, strings, numbers, booleans, and null are valid JSON values.
Does it support comments?
Standard JSON does not support comments, so comments will be reported as invalid.