PolyCaption

Auto captions for short videos

Turn on captions that keep viewers watching. PolyCaption highlights each word as it is spoken, in bold styles made for vertical video.

How it works

  1. Upload your vertical video.
  2. Choose a style such as Viral, Neon or Bold Impact.
  3. Export the captioned MP4 and post it.

Word-by-word highlight

The active word changes colour as it is spoken. Captions are split into short chunks that are easy to read on a phone.

Made for vertical video

Styles are sized for 9:16 and sit in the middle of the frame, away from app buttons.

Captions in any language

Speech is recognised in 99 languages, and captions can be translated into 100+ languages in one click.

FAQ

Do the captions work on TikTok and Instagram?+

Yes. The captions are burned into the MP4, so they show on every platform.

Is there a watermark?+

No. Free and paid exports have no watermark.