ExtormSub adds real-time AI subtitles to anything playing on your Windows PC — YouTube, movies, games, meetings, streams. It captures system audio or mic, transcribes locally with whisper.cpp or faster-whisper (GPU or CPU, nothing uploaded), and overlays a transparent, click-through subtitle window above any app. Optional live translation into your language via any OpenAI-compatible API, or fully free & offline with built-in LibreTranslate. No admin rights, no cloud dependency for speech.

Hey Product Hunt! I built ExtormSub because it solves a problem I personally deal with all the time. My English listening isn't always good enough to catch every word someone says, but if I can see the same conversation as text in real time, it's much easier for me to understand it. And sometimes, the other person is speaking a language I don't understand at all. In that case, ExtormSub can transcribe the conversation live and translate it instantly, so I can understand what they're saying and respond without constantly pausing the audio, replaying it, or copying text into a translator. I also wanted the same experience while watching videos, playing games, joining meetings, or attending online classes.

Live Subtitle Ai

Live AI subtitles & translation for any app on Windows

Live AI subtitles & translation for any app on Windows