Jarvis is a desktop voice dictation assistant that runs locally using Whisper or NVIDIA Parakeet for speech recognition. It applies AI to clean dictation by removing fillers, fixing grammar, and rephrasing text on the fly. Users can customize behaviors through prompt engineering, and the assistant can execute actions like opening websites or setting timers via voice commands. The app is open-source, runs fully offline, and targets Mac users seeking a privacy-focused alternative to subscription-based voice tools.