Supertonic Supertonic

Lightning Fast, On-Device TTS.

Incredibly lightweight and blazingly fast, running natively in your environment via ONNX.

Parameters
66M
PROGRAMMING LANGUAGES
8+
On-Device
100%

Model comparison

A new standard in TTS speed

Supertonic CPS

Characters per second

Supertonic can process over 12,000 characters on high-end GPUs,
and up to about 2,500 characters on consumer laptops.

Supertonic Graph

See It In Action

Experience the speed and quality

Raspberry Pi

Watch Supertonic running on a Raspberry Pi, demonstrating on-device, real-time text-to-speech synthesis

Browser Extension

Turns any webpage into audio in under one second, delivering lightning-fast, on-device text-to-speech with zero network dependency—free, private, and effortless.

E-Reader

Experience Supertonic on an Onyx Boox Go 6 e-reader in airplane mode, achieving an average RTF of 0.3× with zero network dependency

Try It Yourself

Generate speech directly in your browser

Text
Lightning
Speech
126 characters
Female Male
Higher = Better quality, slower inference
Higher = Longer speech duration
Optional for performance comparison
🎙️

Your generated speech will appear here

Initializing... Loading models...
Loading

Supertonic 2 now supports 5 languages and 10 voices. Try the demo here.

Supertonic is now fully supported in Transformers.js 🤗!
It uses a quantized ONNX version of Supertonic for faster inference.

Text handling

Handles text like humans

Financial Expressions

Currency symbols, codes, and abbreviations (M, K, $)

The startup secured $5.2M in venture capital,
a huge leap from their initial $450K seed round.

Time and Date

Time and date formats, abbreviated weekdays/months

The train delay was announced at 4:45 PM on Wed, Apr 3, 2024 due to track maintenance.

Phone Numbers

Area codes, hyphens, extensions (ext.)

You can reach the hotel front desk at (212) 555-0142 ext. 402 anytime.

Technical Units

Numbers with units, abbreviated technical notations

Our drone battery lasts 2.3h when flying at 30kph with full camera payload.

Why Supertonic?

Performance by design

Blazingly Fast

Optimized ONNX Runtime inference delivers speech synthesis at unprecedented speeds. No more waiting.

Ultra Lightweight

Minimal footprint means it runs smoothly on any device - from servers to embedded systems.

On-Device Capable

Complete privacy and zero latency. All processing happens locally - no cloud dependencies.

Natural Text Handling

Seamlessly processes numbers, dates, currency, abbreviations, and complex expressions without pre-processing.

Highly Configurable

Adjust inference steps, batch processing, and other parameters to match your specific needs.

Flexible Deployment

Deploy seamlessly across servers, browsers, and edge devices with multiple runtime backends.

Programming Languages

Fast setup,
instant execution.

Experience Supertonic in your favorite language.


                                
                                

Research & Innovation

Built on our cutting-edge research

On-Device SDK Solutions for Your Business

Looking to integrate Supertonic into your product?
We offer customized on-device SDK solutions tailored to your business needs. Our lightweight, high-performance TTS technology can be seamlessly integrated into mobile apps, IoT devices, automotive systems, and more.

Confirm API Usage

Characters: 0
TTS Model:

⚠️ You will be charged by each API provider according to their respective pricing policies.