Does the generated schema include type validation, or just structure?

It includes type information (string, number, boolean, etc.) for each field based on your sample data, not just the field names.

Can I mark fields as required in the generated schema?

The schema reflects the fields present in your sample — refine which fields are strictly required versus optional based on your actual validation needs afterward.

What JSON Schema draft version does it target?

A modern, widely-supported JSON Schema draft, compatible with most common validation libraries.

Does JSON Schema Generator upload my files to a server?

No. JSON Schema Generator runs entirely in your browser using on-device processing, your files never leave your device.

JSON Schema Generator

Generate a JSON Schema from a sample JSON object.

Runs in your browser

Sample JSON

About this tool

Writing a JSON Schema by hand to describe a data structure's shape and validation rules is verbose and easy to get wrong syntactically, even when you know exactly what the data should look like. This tool generates a JSON Schema from a sample JSON object, giving you a valid schema to start from and refine rather than writing the verbose schema syntax entirely by hand.

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