|Your everyday productivity workspaceValidate JSON data against a JSON Schema in real-time. Human-readable errors, Draft 7 and 2020-12.
Last updated: June 2026
Real-time
Validates as you type
Draft 7 & 2020
Both schema versions
Readable errors
Plain English messages
Your feedback helps us build better tools.
Our free JSON Schema Validator checks JSON data against a schema in real-time with human-readable error messages.
Supports Draft 7 and Draft 2020-12, example schemas, format validation, and copyable error paths.
Runs entirely in your browser using Ajv — your JSON never leaves your device.
Read the full guide: JSON Schema validator guide
Validate request/response bodies against OpenAPI schemas.
Ensure required fields are present.
Find which field fails type or format checks.
Test schemas before deploying to production.
Understand JSON Schema keywords with examples.