Wanted to share something I’ve been working on: a Firefox add-on that does neural-quality text-to-speech entirely offline using a locally hosted...
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The original was posted on /r/selfhosted by /u/PinGUY on 2025-06-13 13:24:17+00:00.

Wanted to share something I’ve been working on: a Firefox add-on that does neural-quality text-to-speech entirely offline using a locally hosted model.

No cloud. No API keys. No telemetry. Just you and a ~82M parameter model running in a tiny Flask server.

It uses the Kokoro TTS model and supports multiple voices. Works on Linux, macOS, and Windows but not tested

Tested on a 2013 Xeon E3-1265L and it still handled multiple jobs at once with barely any lag.

Requires Python 3.8+, pip, and a one-time model download. There’s a .bat startup option for Windows users (un tested), and a simple script. Full setup guide is on GitHub.

GitHub repo: https://github.com/pinguy/kokoro-tts-addon

Would love some feedback on this please.

Hear what one of the voice examples sound like: https://www.youtube.com/watch?v=XKCsIzzzJLQ

Feature Preview
Popup UI: Select text, click, and this pops up. UI Preview
Playback in Action: After clicking “Generate Speech” Playback Preview
System Notifications: Get notified when playback starts (not pictured)
Settings Panel: Server toggle, configuration options Settings
Voice List: Browse the models available Voices
Accents Supported: 🇺🇸 American English, 🇬🇧 British English, 🇪🇸 Spanish, 🇫🇷 French, 🇮🇹 Italian, 🇧🇷 Portuguese (BR), 🇮🇳 Hindi, 🇯🇵 Japanese, 🇨🇳 Mandarin Chines Accents