SmartSub – Real-time speech translation integrated with Windows live captions

Summary: SmartSub is a lightweight tool that delivers real-time speech translation by combining AI translation APIs with Windows live caption functionality. It offers a floating subtitle window with customizable display options and supports multiple translation engines, including Google Translate and OpenAI.

What it does

SmartSub automatically activates Windows live captions and translates audio in real time using AI APIs. It displays subtitles in a transparent, adjustable floating window and saves translation history with export options.

Who it's for

It is designed for users needing live translation during gaming, streaming, video calls, or broadcasts.

Why it matters

SmartSub eliminates the need for separate subtitle windows by integrating translation directly with system captions, enhancing accessibility and communication in real time.