Validate JSON

AJV schema validation

Schemas use JSON Schema (draft-07 compatible) validated in the browser with Ajv. Paste your instance and schema; the error list below is scrollable and updates as you edit.

1 Error

Common Schema Examples

JSON Data

Valid JSON

JSON Schema

Valid JSON

How this tool works

Your instance JSON and schema JSON are both parsed in the browser. Ajv compiles the schema and validates the instance; results and paths update as you type. The Errors tab shows instancePath, message, and schema keyword when available.

Tips

Start from Common Schema Examples to see working schema/instance pairs.
Invalid JSON on either side surfaces as parse errors—fix syntax before interpreting validation failures.
Schema $ref and remote resolution depend on what Ajv is configured with in this build.
Validation is client-only; do not rely on it as the sole gate for production security.