Verified with real YouTube audio
Keep watching. Let translation come to the video.
TanLens captures audio from the browser tab you choose, turns speech into bilingual captions, and overlays them on YouTube, TikTok, and other original pages. The video and its audio keep playing.
20 free minutes monthly. No card required. Audio is processed for captions and is not stored.
Local test on 2026-11-11. Public NASA video used only as the audio source.
Three steps, no meeting bot
Nothing joins your call. Audio is captured where it already plays: the tab, the microphone, or a file you upload.
Capture
Pick a tab, your microphone, or drop in an audio file. The extension keeps the tab audible and streams 16 kHz PCM in two-second chunks.
Translate
Speech recognition transcribes, then a translation model reads the last few sentences for context and applies your glossary.
Keep
Captions float over the video live. When you stop, the transcript is saved, editable, and exportable as subtitles.
Put words on the screen tonight
Twenty free minutes a month, no card, no meeting bot. Start with your microphone, then add the extension for tab audio.