README

Voicebox


  The open-source AI voice studio.
  Clone any voice. Generate speech. Dictate into any app. Talk to agents in voices you own.
  The full voice I/O stack, running locally on your machine.



  
    
  
  
    
  
  
    
  
  
    
  
  
    
  
  
    
  



    



  voicebox.sh •
  Docs •
  Download •
  Features •
  API •
  Troubleshooting





  
    
  



  Click the image above to watch the demo video on voicebox.sh





  



  




 Built with Capy


  
    
      
      
    
  


Voicebox is built and maintained with Capy. A Capy Captain thread directs the project day to day, and its crew threads test, rebase, and review each contributor pull request on Linux and on a Mac Studio before Jamie merges it. Voicebox stays free and open source under the MIT license, with no splash screens, banners, or interruptions in the app.

Try Capy → · How Voicebox is built

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 What is Voicebox?

Voicebox is a local-first AI voice studio — a free and open-source alternative to ElevenLabs and WisprFlow in one app. Clone voices from a few seconds of audio, generate speech in 23 languages across 8 TTS engines, dictate into any text field with a global hotkey, and give any MCP-aware AI agent a voice of your choosing.

The two cloud incumbents sit on opposite halves of the voice I/O loop — ElevenLabs on output, WisprFlow on input. Voicebox does both, bridges them with a bundled local LLM for refinement and per-profile personas, and runs the whole thing on your machine.

- Complete privacy — models, voice data, and captures never leave your machine
- 8 TTS engines — Qwen3-TTS, Qwen CustomVoice, Qwen VoiceDesign, LuxTTS, Chatterbox Multilingual, Chatterbox Turbo, HumeAI TADA, and Kokoro
- Voice cloning and preset voices — zero-shot cloning from a reference sample, or 50+ curated preset voices via Kokoro and Qwen CustomVoice
- 23 languages — from English to Arabic, Japanese, Hindi, Swahili, and more
- Post-processing effects — pitch shift, reverb, delay, chorus, compression, and filters
- Expressive speech — paralinguistic tags like [laugh], [sigh], [gasp] via Chatterbox Turbo; natural-language delivery control via Qwen CustomVoice; voices described in plain language via Qwen VoiceDesign
- Unlimited length — auto-chunking with crossfade for scripts, articles, and chapters
- Stories editor — multi-track timeline for conversations, podcasts, and narratives
- Voice input — global dictation hotkey with push-to-talk and toggle modes, accessibility-verified auto-paste on macOS, in-app mic on every text field, Whisper-based STT
- Agent voice output — one tool call (voicebox_speak) and any MCP-aware agent (Claude Code, Cursor, Cline) speaks to you in a voice you've cloned
- Voice personalities — attach a free-form persona to any voice profile, then Compose, Rewrite, or Respond via a bundled local LLM — agents can invoke the same modes over MCP
- API-first — REST API plus a built-in MCP server for integrating voice I/O into your own apps and agents
- Nativ

Top issues

Latest release

The Capture release.

Voicebox stops being just a voice-cloning studio and becomes a full AI voice studio. Hold a key anywhere on your machine, speak, release — the transcript lands in the focused text field. Flip the primitive around and any MCP-aware agent — Claude Code, Cursor, Spacebot — speaks back through an on-screen pill in one of your cloned voices. A local LLM sits between the two, so transcripts come out clean and voice profiles can carry a personality that reshapes what the agent says before it gets spoken.



 Dictation — speak anywhere, paste anywhere

- Global hotkey cap