Does it show every validation error, or just the first one it finds?

Every error is shown, not just the first, so you can fix all validation issues in one pass rather than one at a time.

Which JSON Schema draft versions are supported?

Modern, widely-used JSON Schema draft versions are supported, matching what most current tooling generates and expects.

Does it tell me exactly where in the JSON the error occurred?

Yes, each error is reported with the specific path to the field that failed validation, not just a generic "invalid" message.

Does JSON Schema Validator upload my files to a server?

No. JSON Schema Validator runs entirely in your browser using on-device processing, your files never leave your device.

JSON Schema Validator

Validate JSON data against a JSON Schema and see every error.

Runs in your browser

JSON Schema

JSON Data

Supports a common subset of JSON Schema: type, required, properties, items, enum, minimum/maximum, minLength/maxLength, pattern.

About this tool

A JSON document that looks correct at a glance can still violate its schema in a way you won't notice without actually validating against it — a wrong type, a missing required field, a value outside an allowed range. This tool validates JSON data against a JSON Schema and shows every error, catching validation issues precisely instead of finding out something's wrong only once whatever consumes the data fails.

Frequently asked questions

JSON Schema Generator

Generate a JSON Schema from a sample JSON object.

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