Smart Generator

JSON Schema Generator.

Paste your JSON, click generate, then instantly get a JSON Schema ready to use for validation.

All processing is done directly in your browser. JSON data is not sent or stored on the server, so it's safe for sensitive information.

Input JSON

Schema Settings

Open when you need to configure generation results.

Open

Basic

Array behavior i

Required fields i

Auto detect format i Enable format inference

Advanced

More options

Extra properties i

Indent style i

Quote style i

Indent size

Auto detect enum i Allow extra tuple items i Always quote field names i

Generated Schema

Import

Quick Actions

Schema Property Editor

Edit schema properties

Generate schema first to edit properties.

How to Use

Create, validate, and export schemas with a concise workflow.

Paste & Format JSON

Paste raw JSON payload in the input panel, then click Format JSON so the structure is easy to read before generation.

Configure Settings & Generate

Open Schema Settings when needed, adjust Basic or Advanced options, then click Generate Schema.

Edit, Validate & Export

Continue editing properties in the editor if needed, test in the Validator tab, then use the More menu to copy or download TS/Zod/OpenAPI.

Best Practice

Save important schema versions to History before experimenting with settings, then use Preview to ensure data shape still meets API requirements.

JSON Schema Generator.

Input JSON

Schema Settings

Generated Schema

Schema Property Editor

Preview Sample Data

Validate JSON Against Schema

Schema History

Import Raw Schema

Export Code

How to Use

Paste & Format JSON

Configure Settings & Generate

Edit, Validate & Export

Best Practice