Start from real data
A representative payload provides a quick baseline schema for API documentation, fixtures, configuration, and validation rules.
JSON to JSON Schema
Generate a practical JSON Schema draft from sample data, including nested objects, arrays, primitive types, and required properties.
Schema generator workspace
Infer a draft 2020-12 schema from example JSON.
Example JSON
Generated JSON Schema
All observed object fields are marked as required. Adjust the schema when your real data allows omissions.
Review inferred constraints
The generator can infer observed types but not business rules such as optional fields, numeric limits, or string patterns. Add those constraints after generation.