Free JSON Schema Generator
Generate JSON Schema (draft-07) from sample JSON data. Auto-detects types, handles nested objects and arrays, and shows schema statistics. No signup required.
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Free JSON Schema Generator Features
Auto-generate JSON Schema from any JSON sample
Type Detection
Automatically detects string, number, integer, boolean, null, array, and object types.
Draft-07 Format
Generates schemas compliant with JSON Schema draft-07 specification.
Nested Support
Handles deeply nested objects and arrays with proper schema structure.
Schema Stats
See total properties, maximum nesting depth, and types found in your schema.
FAQ
What is JSON Schema?
JSON Schema is a vocabulary for annotating and validating JSON documents. It defines the structure, types, and constraints of JSON data.
Is draft-07 the latest version?
Draft-07 is the most widely supported version. Draft 2020-12 is newer but has less tooling support. Draft-07 works with most validators.
How do I use the generated schema?
Use it for API validation (ajv, joi), form generation, documentation, TypeScript type generation, or testing data contracts.
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