Subtitles Unbound

Your own subtitles on any streaming site: find them online, two languages, auto-sync, on-device live captions and translation.

Watch with the subtitles you want, on any site that plays video: streaming services, video sites, course platforms, your own files in the browser. • Your files on any player: open the subtitle file you already have, in any of the common formats. Old encodings, including non-Latin scripts, are detected automatically. • Two languages at once: load a second file and it lines up with the first by itself, even when the two were made for different frame rates. • Find subtitles online: search OpenSubtitles.com from the panel. When the page plays a real video file, subtitles made for that exact file come first. Needs your own free OpenSubtitles API key. • Perfect timing: subtitles follow the video’s play, pause and seek. Press Now! when you hear a line to lock the timing, or let Auto-sync fix delay and speed by listening to the dialogue. • Live captions with no file at all: the video’s speech becomes captions word by word, recognised on your computer (Whisper, on the graphics chip when there is one, or the lighter Vosk engine). Nothing you watch or hear is uploaded. • Translation on your computer: Chrome’s built-in translator can translate your file or the live captions into another language. • A CC switch on every video, and a small panel that stays out of the way. • Your look: font, size, colour, background, position, and the site’s own subtitles hidden if you like. Works in fullscreen. Copy-protected players don’t let extensions hear their sound, so live captions and Auto-sync work only on players that allow it; your own subtitle files work everywhere.