JSON Schema Generator

Generate JSON Schema from sample JSON data — auto-detect types and structure.

100% Browser-Based

Files Never Leave Your Device

No Server Uploads

Zero Data Collection

How It Works

Paste your sample JSON data

Click Generate to infer the JSON Schema

Copy or download the generated schema

Automatically detects string, number, boolean, null, array, and object types

Handles deeply nested objects and arrays of objects

Generates JSON Schema Draft-07 compatible output

What JSON Schema version does it output?

JSON Schema Draft-07 (https://json-schema.org/draft-07/schema#).

Does it detect required fields?

All top-level properties in the sample are marked as required by default.

Can it handle arrays of different types?

Yes, mixed-type arrays are represented using anyOf in the schema.