JSON Schema generator

Paste a sample JSON document and get a matching JSON Schema — types, required keys, array items and nested objects are inferred automatically. Nothing is uploaded.

Your JSON

JSON Schema draft

Schema title

Options

Mark all present keys as required Disallow extra properties (additionalProperties: false) Include an example value for each field

Generated JSON Schema

Your JSON is parsed and converted entirely in your browser. Nothing is uploaded.

How it works

STEP 1

Paste your JSON

Drop in an API response or any JSON object. It is parsed right in your browser — nothing leaves your device.

STEP 2

Pick a draft

Choose JSON Schema draft-07 or 2020-12. Types, required keys, array items and nested objects are inferred recursively from your sample.

STEP 3

Copy or download

Copy the generated schema with one click, or download it as a ready-to-use .json file.