supertonic
Lightning-Fast, On-Device, Multilingual TTS — running natively via ONNX.
Convert written text into speech in multiple languages directly on your device without needing internet access.
From the README
pip install supertonic
- Go: install the ONNX Runtime C library. On macOS, brew install onnxruntime is enough; the Go example auto-detects Homebrew paths.
- Java: use a JDK, not just a JRE. On macOS, brew install openjdk@17 works.
- C#: targets .NET 9 and allows major-version roll-forward, so .NET 9 or newer runtimes can run it.
Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.
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supertonic has 13.3k stars on GitHub. It has been forked 1.4k times. supertonic is written mainly in Swift. It has been in active development since 2025. supertonic is available under the MIT license. Its main topics are cpp, csharp, flutter, go.
Compare with the paid tools it replacesWhat is supertonic?
Lightning-Fast, On-Device, Multilingual TTS — running natively via ONNX.
Is supertonic open source?
supertonic is an open-source project. It is released under the MIT license.
Is supertonic free?
Yes. supertonic is free and open source — you can use, modify and self-host it.
What license does supertonic use?
supertonic is available under the MIT license.
What language is supertonic written in?
supertonic is written mainly in Swift.
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