SubVibe - AI Subtitle Translator

About

Watch anything in your language. SubVibe overlays AI-translated subtitles on streaming video - YouTube, Netflix, ZDF, Deutsche Welle, and Amazon Prime Video - turning the video's existing captions into natural, idiomatic subtitles in your language.

WHAT MAKES IT DIFFERENT
  • Pre-translated AHEAD of the playhead - SubVibe reads the whole subtitle track up front and translates the upcoming lines before you reach them, so there's no lag. A small counter on the toolbar shows how far ahead it's ready.
  • Perfect sync - subtitles are keyed to the exact playback time. Scrub, pause, or rewatch and they follow.
  • Cached & free on replay - once a video is translated it's saved locally on your device, so watching it again is instant and costs nothing.
  • Dual subtitles - show the translation, the original line, or both stacked together. Great for language learning.
  • 30+ languages, with right-to-left support (Persian, Arabic, Hebrew, Urdu) and a bundled Persian font.
  • Per-video settings - language(s), on-screen position (drag each line where you want it), text size, and a timing nudge, all remembered per video.

PRIVATE BY DESIGN - BRING YOUR OWN KEY
  SubVibe uses YOUR OpenAI API key, stored only on your device. Caption text is sent directly from your browser to OpenAI to translate it - there are no SubVibe servers, no accounts, no ads, and no tracking. Translation costs a few cents per hour of video; cached replays are free.

OPEN SOURCE
  SubVibe is fully open source (MIT) with no build step - the published code is exactly the source you can read and verify at https://github.com/nuved/subvibe. That's how you can be sure your key
  never leaves your device.

HOW IT WORKS
  1. Open the SubVibe popup, paste your OpenAI key, and pick your target language(s).
  2. Play a video. Turn the player's own captions ON once so SubVibe can read the track - then it pre-translates the rest in sync.
  3. Re-watch anytime - it replays from your local cache for free.

Note: a video must have a caption/subtitle track for SubVibe to translate. SubVibe renders its own overlay and does not modify the site.

Made by Nimanou · https://nimanou.com