JSON Schema Generator Online — Free
Generate a JSON Schema definition from a sample JSON document.
Ctrl+Enter to convert
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Frequently Asked Questions
Which JSON Schema draft is generated?
Our generator creates schemas compatible with JSON Schema Draft-07, the most widely adopted version for API validation.
How are types inferred from JSON?
Types are automatically detected from sample values: strings, numbers (integer vs float), booleans, arrays (with item type detection), and nested objects.
Can I use the generated schema for API validation?
Yes, the generated schema is valid JSON Schema Draft-07 and works with validators like Ajv, json-schema-validator, and OpenAPI/Swagger.
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