Desktop app · Rust · whisper.cpp

CaptionSmith

On-device video captioning for macOS and Windows. Transcribe locally with whisper.cpp (GPU-accelerated), edit, style, add speaker labels, batch-process, then burn in or export .srt/.vtt/.ass. No accounts, no cloud.

About the browser demo: The browser version downloads the ffmpeg video engine (about 31 MB) the first time you export; your browser keeps it after that. Files never leave your computer. In the browser you import SRT/VTT files or type captions yourself. Whisper transcription, speaker labels, batch mode and link import are in the desktop app only.