LiveCaptions Translator is an open-source real-time speech translation utility for Windows. It captures speech recognition feeds from built-in Windows LiveCaptions and translates them instantly via modern LLM and traditional translation APIs.
Technical Overview of LiveCaptions Translator
Operating with low resource consumption, the tool pairs native on-device speech transcription with modular translation backends instead of requiring specialized hardware like Copilot+ PCs. It distributes as a direct executable with portable deployment flexibility, available either as a lightweight binary or packaged alongside the .NET 8.0 runtime. Because it is licensed under the MIT license, it offers transparent data control without proprietary software lock-in.
Core Features of LiveCaptions Translator
- Broad API support integrates both LLM providers (Ollama, OpenRouter, OpenAI compatible) and classic engines (Google Translate, DeepL, Baidu, LibreTranslate).
- Custom overlay display projects borderless, transparent subtitles onto screen layers for games, streaming, and full-screen video playback without interrupting user tasks.
- Local history management logs source audio transcriptions alongside target translations and exports historical records to standard CSV files.
- Fluent UI shell matches modern Windows visual styles, providing light and dark theme switching and an optional Log Cards contextual monitor.
System Compatibility & Updates
This tool runs strictly on Windows 11 version 22H2 or higher with LiveCaptions support and requires the .NET 8.0 or newer runtime environment. Recent master branch updates maintain automated CI builds alongside enhancements for real-time speech recognition routing.