Runs in the browser · Text to speech
Run Supertonic TTS 2 in your browser
Supertonic TTS 2 downloads 250.7 MB over WebGPU (fp32), or 250.7 MB over WebAssembly (fp32), to turn text into a spoken voice entirely in the tab with Transformers.js. No install, no server.
Text to speech · onnx-community/Supertonic-TTS-2-ONNX
- Parameters
- -
- Pipeline task
- custom
Reading
Ships as three separate ONNX parts (text encoder, latent denoiser, voice decoder) in fp32 only, no quantized build published yet. There is no pipeline() task that wires a 3-stage TTS graph together; expect custom ONNX Runtime code.
Will it run in your browser?
Checking for WebGPU support…
All measured variants
| Variant | Size |
|---|---|
| fp32 WebGPU pick WASM pick | 250.7 MB |
Sizes measured from the HuggingFace API file tree for onnx-community/Supertonic-TTS-2-ONNX, not estimated.
Use it with Transformers.js
There is no stable transformers.js pipeline() call for this model yet, and no verified low-level snippet either (see the Reading panel above). Check the model card on HuggingFace for current usage examples.
Embed this
A live badge for your model card or README: 250.7 MB over WebGPU, updated as the data is. [](https://localmodel.run/browser/supertonic-tts-2) <a href="https://localmodel.run/browser/supertonic-tts-2"><img src="https://localmodel.run/badge/browser/supertonic-tts-2/size.svg" alt="Supertonic TTS 2 in browser" /></a> Sources
Same job, different size
FAQ
WebGPU or WASM for Supertonic TTS 2, in practice?
Chrome, Edge, and Safari 26+ run the WebGPU build (fp32) on the GPU. Firefox has WebGPU on Windows and Apple Silicon Macs but not everywhere yet. Any browser without a WebGPU adapter falls back automatically to the WebAssembly build (fp32) on CPU: same model, slower to load, slower to run.
What does fp32 mean for Supertonic TTS 2?
The WebGPU build here uses fp32: full 32-bit floating point, the uncompressed original weights. The WASM fallback uses fp32: full 32-bit floating point, the uncompressed original weights.
Sizes measured 2026-08-01 from the HuggingFace API. Last validated 2026-09-14. See all browser models or the methodology.