Voice & audio
supertonic
Supertonic (TTS) — Lightning-Fast, On-Device TTS
★ 223
January 2026
OpenRAIL
Voice & audio
What we checked ourselves
Not copied from the project's own blurb. These are things we opened and verified, with the date.
- 12 Sept 2026We opened the hosted demo and confirmed it was running.
Where this sits among the 119 tools we list in Voice & audio
- Works without using a terminal93 of 119
- No API key required114 of 119
- Keeps your data on your own machine31 of 119
- Runs on a phone alone73 of 119
Only 10 of the 119 meet all of the conditions above.
Counted from our own checks: every tool we list is examined against the same criteria.
What it does
Supertonic (TTS) — Lightning-Fast, On-Device TTS
Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.
Screenshots & visuals
Before you start
- Setup difficultySome setup needed
- Command lineNot required
- API keyNot required
- Sends data onlineNo
Judged automatically from the project's own metadata. Always confirm on the official page.
supertonic FAQ
- Do I need to install anything or write code to use supertonic?
- No install needed — it runs in the browser.
- Does supertonic work on a phone?
- Yes, it works on a phone.
- Can I use supertonic commercially?
- Only under conditions. The page shows OpenRAIL, but the actual terms — the AI model this page runs, or the provider's own terms — attach restrictions. Check the provider's terms before using it at work.
How it compares
The conditions that decide whether you can actually use it, side by side.
| Tool | Command line | API key | Sends data out | Phone | Commercial use |
|---|---|---|---|---|---|
| supertonic (this page) | Not needed | Not needed | No | Yes | With conditions |
| Kokoro-TTS | Not needed | Not needed | Yes | No | Yes |
| Chatterbox | Not needed | Not needed | Yes | No | Yes |
| Edge-TTS-Text-to-Speech | Not needed | Not needed | Yes | No | Not verified |
"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.