JSON Schema Validator
Format, Validate, and Convert JSON Instantly
Interactive Console
Test Your Payloads Against Any Schema
Paste your JSON document and corresponding schema into the dual-pane editor. Our engine parses your data in real-time, highlighting structural mismatches, type violations, and missing required fields before they reach production.
The validation console features comprehensive error reporting, pinpointing exact line numbers and character offsets for every failure. Switch between Strict mode, which enforces every constraint and rejects unknown properties, and Loose mode, which ignores non-critical warnings and allows additional fields for flexible API testing.
Strict Validation
Enforces exact type matching, required fields, and pattern constraints. Ideal for CI/CD pipelines and database migration scripts where data integrity is non-negotiable.
Loose Validation
Tolerates extra properties and minor type coercions. Perfect for rapid prototyping, legacy system integration, and exploratory API debugging.
Standards Compliance
Full Support for Draft 4 Through 2020-12
JSONify implements the complete JSON Schema specification, ensuring backward compatibility while unlocking modern constraint capabilities. Define complex data structures using $ref pointers, conditional validation with if/then/else, and advanced format checks for emails, URIs, and ISO 8601 timestamps.
Our parser natively handles draft-04 through draft-2020-12, automatically detecting the $schema identifier to apply the correct validation ruleset. You can validate nested objects, array items with uniqueItems constraints, and enforce minimum/maximum lengths on strings and collections without external dependencies.
Ready to Secure Your Data Pipelines?
Stop guessing whether your payloads match your contracts. Validate against industry-standard schemas in milliseconds and catch structural bugs before deployment.