PolyCaption

Automatic subtitle generator

Upload a video and get timed subtitles in seconds. Every line can be edited before you download.

How it works

  1. Upload a video or audio file.
  2. Review the generated subtitles.
  3. Download SRT or VTT, or export the video with captions.

Timed to the word

Each line starts and ends with the speech, using word-level timestamps rather than fixed blocks.

Standard subtitle formats

SRT works with YouTube, Facebook, Premiere Pro, DaVinci Resolve and most players. VTT is the web standard used by HTML5 video.

Readable line lengths

Lines are kept to about 42 characters and split into two balanced rows, the length broadcasters use.

FAQ

What is the difference between SRT and VTT?+

Both store subtitle text with timestamps. SRT is the most widely supported; VTT is used on the web and supports styling.

Can I generate subtitles for an audio file?+

Yes. Upload MP3, WAV or M4A and download the subtitles or a transcript.