JSON schema validator

Check JSON against a JSON schema and see every error with its line.

Processed on your device, never uploaded

Schema

JSON schema

Data

JSON to check

Result

Paste a schema and the JSON to check. The result appears here.

Processed on your device, never uploaded

What it does

The validator checks a JSON document against a JSON schema (draft-07, 2019-09 or 2020-12) and lists each error in plain words, with the path and the line of the value.

How to use it

1Paste the schema.
2Paste the JSON to check.
3Read the errors and fix them in place.

Questions

Is my data sent anywhere?

No. Validation runs on your device.

Which drafts work?

Draft-07, 2019-09 and 2020-12. Draft 04 and older are not supported.

Are formats like email checked?

No. Only the structure is checked: types, required keys, ranges, patterns and enums.