JSON Schema Generator – From Sample JSON

Paste JSON and generate a JSON Schema. Infers types and structure. Fully client-side.

Templates:

Schema is generated automatically. Invalid JSON will show an error with line/column when possible.

Paste JSON or use a template.

Options

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Frequently Asked Questions

What is JSON Schema?

JSON Schema describes the structure and types of JSON data. It is used for validation, documentation, and code generation. This tool infers a draft-2020-12 style schema from your sample JSON.

How is the schema inferred?

The tool inspects your sample JSON: types (string, number, integer, boolean, array, object), merged array item types, optional format (email, uri, date, date-time, uuid), and optional enum detection for repeated values.

Is my JSON sent to a server?

No. Generation runs entirely in your browser. No upload, no server calls, no tracking.