Convert a JSON sample into a TypeScript interface definition.
Converts a JSON example into a TypeScript interface definition by inspecting every key and inferring its type (string, number, boolean, null, nested object, array). Nested structures produce nested interfaces automatically.
The generator handles arrays of mixed types as union types and marks keys that appear in some array items but not others as optional (?). It names nested interfaces after their parent key with a capitalised suffix.
For best results, use a representative JSON sample that includes all the fields your API can return. Optional fields that are absent from the sample will not appear in the interface — add them manually after generation.
No. Everything runs locally in JavaScript on your device — nothing is transmitted or stored.
Yes. The output is generated locally in your browser and is yours to use however you like — commercially or otherwise.
Once the page loads, yes — all processing happens in JavaScript on your device, with no server calls.
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