Luma — Captions for YouTube

Bold, animated captions for YouTube, timed to the word. Uses YouTube's own captions, or Whisper AI right on your computer.

Luma turns YouTube's captions into bold, animated type that lands the moment each word is spoken. Pick a look, press play, and captions appear right on the video: timed to the word, in your style, and out of the way of YouTube's controls. WHAT YOU GET • Captions timed to the word. Luma uses YouTube's own captions, which time every word, and lines up captions written by the creator with them for exact timing. • 59 caption styles and 25 animations, from clean subtitles to punchy creator looks like Beast Mode, Poster and Stamp. • 37 fonts, plus your own text and highlight colors. • Drag captions anywhere on the video. They step aside when YouTube's controls appear. • Captions for videos that have none. Whisper, an open speech-recognition model, runs inside your browser and writes captions ahead of playback. Download a model once (Tiny is 39 MB, Base is 73 MB) and it works on every video. • Translate captions into 30 languages with YouTube's translation. • Works in YouTube players embedded on other sites. • One click to switch captions on or off: the Luma button next to CC, or Alt+Shift+L. • Extras: emoji, keyword highlights, filler-word removal, swear-word hiding and a timing nudge. LUMA PRO: $1, ONE TIME • All 59 caption styles (12 are free) and all 37 fonts (8 are free) • Captions on YouTube Shorts • Whisper Small and Large Turbo, the most accurate models No subscription. Buy it from the Luma popup; checkout is handled by Stripe. PRIVATE BY DESIGN • Speech recognition runs on your computer. Audio never leaves it. • No account, no tracking, no ads. • Luma only connects to YouTube (for a video's own captions), Hugging Face (when you choose to download a Whisper model), and its license server and Stripe (only if you buy Pro). HOW TO USE 1. Open any YouTube video. 2. Click the Luma icon in your toolbar to pick a style and animation. 3. Watch. Captions appear on their own. Luma is an independent project and isn't affiliated with or endorsed by YouTube or Google.