JSON Schema Generator
Generate a JSON Schema from a sample JSON object automatically.
What is the JSON Schema Generator?
This tool inspects a sample JSON object or array and automatically infers a matching JSON Schema — the data type of every field, which fields are present (marked as required), and the structure of any nested objects or arrays — saving you from writing a schema by hand.
How to use it
- Paste a representative example of your JSON data.
- Click Generate Schema to get a JSON Schema describing its shape.
Because the schema is inferred from a single example, review it before relying on it — a field that's always a number in your sample will be typed as a number, even if it could legitimately be null or a string elsewhere in your real data. Use the generated schema as a solid starting draft rather than a final, hand-verified specification. Everything runs locally in your browser.