Free caption tools

Small utilities for working with subtitle files. Everything runs in your browser: no upload, no account, no server.

• SRT to VTT converter

  Turn SubRip .srt subtitle files into web-ready WebVTT .vtt files, right in your browser.

• VTT to SRT converter

  Turn WebVTT .vtt caption files into SubRip .srt subtitles for editors and players.

Need captions burned into the video itself for TikTok, Reels or Shorts? That is what the caption.sh API does: word-timed, karaoke-style captions drawn onto the frames with one POST.