JSON Schema Validator
Validate JSON data against a JSON Schema and see a detailed list of validation errors with exact property paths.
Validation result
Your result will appear here.
What is JSON Schema Validator?
JSON Schema Validator verifies JSON data structures and values against formal JSON Schema definitions. Powered by Ajv, the fastest JSON schema validator for JavaScript, it reports missing required fields, type mismatches, numeric bounds, and schema violations with precise property paths. Essential for API contract testing and data ingestion validation.
How to use JSON Schema Validator
- 1Paste your JSON Schema definition in the left editor panel.
- 2Paste your target JSON data payload in the right editor panel.
- 3Review the validation status in the result box; if invalid, inspect the listed error paths.
Key features
Strict Schema Validation
Validates data types, required properties, enums, array constraints, and object structures.
Detailed Error Reporting
Pinpoints the exact schema keyword and instance property path where validation failed.
Modern Draft Support
Supports standard JSON Schema specifications including Draft-07, 2019-09, and 2020-12.
Client-Side Privacy
Evaluates schemas and payloads locally in memory without transmitting data over the network.
Examples & use cases
Valid User Object
Verifying data matching required schema fields
Schema: {"type":"object","required":["name"],"properties":{"name":{"type":"string"}}}
Data: {"name":"Aarav"}Data is valid against the schema.
Frequently asked questions
Helpful guides & tutorials
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