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JSON Schema Generator & Validator

Generate JSON Schema from sample data or validate JSON against a schema. All processing happens entirely in your browser — your data never leaves your device.

JSON Input

What is JSON Schema Generator & Validator?

JSON Schema Generator automatically creates JSON Schema definitions from sample JSON data, and validates JSON documents against schemas. JSON Schema is the standard for describing the structure of JSON data, used in OpenAPI specs, form validation, and data contracts.

How to Use

  1. Switch between Generate and Validate modes using the tabs
  2. To generate: paste sample JSON and click Generate Schema
  3. To validate: paste a JSON Schema and your data, then click Validate

Use Cases

  • Generating JSON Schema for OpenAPI/Swagger API specifications
  • Validating API request/response payloads against a contract
  • Creating schema definitions for form validation libraries
  • Bootstrapping TypeScript type definitions from schema

Privacy & Security

All processing happens entirely in your browser. Your JSON data and schemas are never sent to any server.

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