TOON for TypeScript and JavaScript (TS/JS)

TOON for TypeScript is the official @toon-format/toon npm package: encode() turns any JSON-serializable value into TOON (Token-Oriented Object Notation) and decode() turns TOON back into the same JSON value. It is written in TypeScript and ships its own type definitions, so it works the same in TS and plain JavaScript. Use it to send LLMs your data with about 43% fewer tokens than JSON (42.6% in the official TOON v4.1 benchmark).

import { encode, decode } from '@toon-format/toon';

// Your JSON data
const data = { "name": "Alice", "age": 30 };

// Convert to TOON format
const toonString = encode(data);
console.log(toonString);
// Output:
// name: Alice
// age: 30

// Convert back to JSON
const jsonData = decode(toonString);

No code needed to try it: paste data into the JSON to TOON converter, compare token counts in the TOON token calculator, or read the TOON format guide.