What Is JSON Schema?
JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It defines the structure, data types, required fields, and constraints for JSON data. Widely used in API validation, form validation, and configuration file verification.
How to Use
Paste your JSON data in the first box and the JSON Schema in the second box. Click Validate to check if the data conforms to the schema. The tool shows whether validation passed and lists any errors with their JSON paths and descriptions.
API Access
Use our REST API: POST /api/schema/validate with JSON body {"data": {...}, "schema": {...}}. Returns valid (boolean) and errors array. Free for 100 calls/day.