Best JSON Schema Validator – Validate Your JSON Instantly
Why Use a JSON Schema Validator?
This tool helps developers and QA engineers confirm that JSON responses conform to a required schema structure before shipping or integrating APIs. It prevents bugs and data mismatches in real-world applications.
🔍 Common Use Cases:
- Validating API responses in frontend/backend development
- Ensuring configuration files match a known schema
- Verifying webhook payloads from third-party services
- Unit testing structured data objects
✅ Example – Object:
JSON: { "id": 101, "active": true } Schema: { "type": "object", "properties": { "id": { "type": "number" }, "active": { "type": "boolean" } }, "required": ["id", "active"] }
✅ Example – Array:
JSON: ["apple", "banana", "cherry"] Schema: { "type": "array", "items": { "type": "string" } }
✅ Example – Single Element:
JSON: 42 Schema: { "type": "number" }
Use this validator anytime you want to quickly test structured data against expectations. It runs entirely in your browser – no server interaction required.