AI captions with local Whisper
Rackast generates AI captions using a local Whisper model that runs entirely on your device — nothing is uploaded.
One-time download
The Whisper model is a one-time 190MB download.
Requirements
AI captions require microphone audio in your recording.
Related guides
CaptionsEditing & styling captionsEdit caption text and style captions in Rackast on Windows — fonts, weight, colors, background opacity, letter spacing, and position presets.CaptionsCaption animationsUse word-by-word fade animation in Rackast on Windows to make your captions feel dynamic and easy to follow along with narration.CaptionsManual captionsAdd captions manually in Rackast on Windows when you want full control over the text of your screen recording.