JSON Validator
Check whether JSON is valid and locate the exact syntax error.
Paste JSON above to check whether it parses.
About the JSON Validator
Validation answers one question precisely: is this document parseable, and if not, where does it break? The validator reports a pass or fail verdict, the line and column of the first error, and a short structural summary of valid input.
That summary, which lists the top-level type, key count and maximum nesting depth, is often as useful as the verdict when you are checking whether a payload has the shape you expect.
How to use the JSON Validator
- 1Paste the JSON you want to check.
- 2Press Validate.
- 3If it fails, read the line and column and fix the highlighted area.
- 4If it passes, review the structure summary.
Features
- Strict JSON parsing with a clear pass or fail result
- Line and column of the first syntax error
- Structure summary with type, key count and depth
- Detection of common mistakes such as trailing commas
- No size limit beyond your device's memory
Why people use it
- Confirm a configuration file will load before deploying it.
- Fix syntax errors quickly instead of guessing.
- Sanity-check a payload's shape against your expectations.
Common use cases
- Validating a manifest before committing it.
- Checking a hand-edited settings file.
- Verifying JSON produced by a script or template.
Privacy and your data
Validation happens locally; nothing you paste is uploaded or logged.
Frequently asked questions
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