Web and Node.js SDK

The Web SDK shares one TypeScript API across modern browsers and Node.js. Browsers use WebAssembly and Cache API storage; Node uses the same ONNX Runtime Web engine with filesystem storage.

Browser and NodeWebAssembly or Node.js 20+

Rich outputPCM, WAV, MP3, streaming, playback, and word timings

Source previewClone and build the repository until the npm package is published

import {KittenTTS, createBrowserAudioPlayer} from '@kittentts/web';

const tts = await KittenTTS.create({
  model: 'nano-int8',
  player: createBrowserAudioPlayer(),
});

await tts.speak('This voice is generated in the browser.');

Capabilities

Four local models and eight voices.
Browser audio helper and custom player interface.
WAV and MP3 encoding.
Sentence-by-sentence async streaming and FIFO playback queue.
Cache API, memory, Node filesystem, or custom asset storage.
Preloaded bytes, local paths, or self-hosted assets.
Self-hosted ONNX Runtime WASM configuration.

Repository: KittenML/KittenTTS-web

Capabilities​

Capabilities