JSON data
JSON Schema
Validate JSON data against a JSON Schema directly in your browser. This JSON Schema Validator checks common schema rules such as types, required properties, arrays, enums, string lengths, numeric ranges, patterns, and nested objects.
Use it when debugging API contracts, testing configuration files, or reviewing sample payloads before adding validation to an application. The tool is dependency-free and does not send your JSON or schema to a server.
JSON Schema is a vocabulary for describing the expected structure, types, and constraints of JSON data.
It supports common validation keywords for practical checks. Complex drafts and application-specific extensions should still be verified with a full JSON Schema library.