Captionshaper 1.0.0

Captionshaper 1.0.0: free, offline auto-subtitles for Mac and Windows.

• Drop in a video or audio file. Speech is recognised on your computer (Whisper Large v3 Turbo through whisper.cpp; GPU on Apple Silicon).
• Words appear live while it works.
• No captions over music or silence (voice activity detection), word-level timing, and line breaks that read well.
• Edit in place, find and replace, split, merge, undo. Uncertain words are underlined.
• Styles: Clean, Box, Pop and Word by word, with a phone view for vertical videos.
• Export SRT, VTT, ASS, TXT, or an MP4 with captions burned in.
• 99 languages, detected automatically, plus translation to English.

Downloads

• Mac (Apple Silicon): Captionshaper-1.0.0-mac-arm64.dmg. First time: right-click the app and choose Open.
• Windows 10/11 (64-bit): Captionshaper-Setup-1.0.0-win-x64.exe. If SmartScreen appears: More info, then Run anyway.

The speech model (about 570 MB) downloads once on first use. Nothing else connects to the internet.