JSON Schema Generator
Generate JSON Schema from example JSON data. Supports Draft 2020-12 and Draft-07, nested objects, arrays, strict mode, and instant validation.
Validate JSON Against Schema
Frequently Asked Questions
How do I generate a JSON Schema from example JSON?▾
Paste your example JSON into the input field and click Generate. The tool infers types, detects required fields, and produces a valid JSON Schema in Draft 2020-12 or Draft-07 format.
What is the difference between Draft 2020-12 and Draft-07?▾
Draft 2020-12 is the latest JSON Schema specification with improved vocabulary and $dynamicRef support. Draft-07 is widely supported by older tools and validators. Both are valid standards.
What does strict mode (additionalProperties: false) do?▾
Strict mode adds "additionalProperties": false to object schemas, which means the schema will reject any JSON object that contains properties not explicitly listed in the schema.
Can I validate JSON against the generated schema?▾
Yes. After generating a schema, paste a JSON instance into the validation input and click Validate. The tool checks types, required fields, additional properties, and other constraints.
Is my data safe when using this JSON Schema generator?▾
Yes. All schema generation and validation happens entirely in your browser. No data is ever sent to a server.