What does this tool do?
Convert a JSON Schema into a TypeScript interface, with optional properties and nested object types. Everything runs locally using JavaScript in your browser — nothing you paste or upload is ever sent to a server.
How to use this tool
- Paste your json schema into the left-hand box.
- Fill in the interface name field above the input.
- Click Generate TypeScript.
- Copy the typescript interface from the output box.
Frequently asked questions
How are required vs optional properties handled?
Properties listed in the schema's required array are generated without a question mark; everything else is generated as an optional property with a trailing ?.
Are nested objects given their own named interface?
No, nested objects are generated as inline object type literals to avoid naming collisions and ordering issues — copy out and rename any nested shape yourself if you want a separate named interface.
Does it support $ref or oneOf/anyOf?
No, this tool reads type, properties, required, items, and enum directly — $ref, allOf, oneOf, and anyOf are not resolved. For full multi-language code generation from sample data instead of a schema, see the upcoming JSON to Code tools.