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JSON Schema Generator

Generate JSON schemas from JSON data, validate, and reverse engineer

Schema Draft Version

Draft 7 Draft 6 Draft 4

Required Properties

All None Smart (null values)

Allow additional properties

Include examples from values

Include description fields

JSON Input

Generated Schema

JSON Schema

Sample JSON Output

JSON Schema

JSON Data

Validation Results

Results will appear here...

About JSON Schema

JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. This tool helps you:

Generate Schemas from JSON data automatically detecting types, nested structures, and array patterns.

Reverse Engineer sample JSON from schemas for testing and documentation.

Validate Data against schemas to ensure your JSON matches the expected structure.

Draft 7: Latest with powerful validation keywords
Draft 6: Improved validation and metadata
Draft 4: Widely supported baseline version

Automatically detects: string, number, integer, boolean, null, array, object