AI caption generator
AI caption generator with true word-by-word sync
Zupum's AI caption generator transcribes your video using acoustic word timings, then highlights each word exactly as it is spoken - the karaoke effect short-form audiences expect, generated automatically.
Captions that actually match the lips
Line-level subtitles drift. Zupum times captions at the word level from the audio itself, so highlighting lands on the spoken word rather than roughly near it.
- Word-level timestamps from acoustic transcription, not guesses
- 40+ caption styles across bold creator, clean and editorial looks
- Custom fonts, sizes, colours, outlines and shadows
- Drag captions up or down in the preview; position applies everywhere
- Sync nudge slider for frame-level correction
- Filler words like um and aah removed from both audio and captions
Styling built for retention
Caption styling is not decoration - it is watch time. Pick a style before the edit starts or switch it mid-edit and see the whole video restyle instantly.
More than captions
The same transcript drives B-roll placement, sound effects and hook text, so your captions and visuals reinforce each other instead of being two separate jobs.
Generate captions now
Open the studio, upload a clip and captions appear with the first AI pass.