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JSON Schema Generator

Generate a JSON Schema (draft-07) from any JSON data. Infers types, handles nested objects, arrays, required fields, and enum detection.

Draft-07 schema outputType inferenceRequired field detectionNested object supportArray items schemaClient-side only
JSON Schema will appear here...

How to Generate a JSON Schema

  1. 1Paste your JSON data into the left input area
  2. 2Click "Generate Schema" to create a JSON Schema
  3. 3View the generated schema in the right panel
  4. 4The schema uses draft-07 and includes $schema, type, properties, and required
  5. 5Review the Schema Summary for a quick overview of the output
  6. 6Copy the schema using the copy button for use in your projects

Frequently Asked Questions

What is JSON Schema?

JSON Schema is a standard for describing the structure of JSON data. It defines expected types, required fields, and constraints. It's used for API validation, form generation, documentation, and data quality checks.

Which JSON Schema version does this generate?

The tool generates schemas conforming to JSON Schema draft-07, the most widely supported version across validators, libraries, and tools.

How does type inference work?

The generator examines each value: strings become "string", whole numbers "integer", decimals "number", and booleans "boolean". Objects get properties schemas, and arrays get items schemas inferred from their contents.

Does it detect required fields?

Yes. All non-null fields found in the input JSON are marked as required. For arrays of objects, only fields present in every array element are marked required.

Can it handle arrays of objects?

Yes. When an array contains objects, the generator merges all objects to produce a comprehensive items schema that captures every possible field across all elements.

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