Can TanLens show dual subtitles on any video?

It generates bilingual captions from the audio of a browser tab or an uploaded file. It does not add a second subtitle track inside the video platform’s own player, so the display is TanLens’s caption panel.

Is TanLens useful for language learners?

Yes, for listening to real meetings, streams and lectures with a translation at hand, and for turning those sessions into a transcript. It is not a vocabulary or flashcard app, so it complements rather than replaces a study tool.

Which one should I choose for watching YouTube?

For a live stream or a video whose audio you want captioned now, TanLens works from the tab. For repeated study of a recorded video with dual subtitles in the player, Trancy is purpose-built.

Comparison

TanLens vs Trancy: live audio or dual subtitles?

Compare TanLens and Trancy for language learners: live speech translation and transcript export versus dual subtitles for video, as of 2026-11.

Start live captions Transcribe a file

TanLens translates live speech from a tab, microphone or file into bilingual captions you can edit and export. Trancy provides dual subtitles for video and is built around language learning, as of 2026-11. The overlap is the bilingual screen; the difference is whether you are following a live conversation or studying a video at your own pace.

01Two different learning workflows

Trancy is designed for watching video with dual subtitles, which gives a learner the original and the translation at the same time and supports repeated viewing. TanLens is designed for live audio: a meeting, stream or lecture where the words keep moving and you need captions now. TanLens can also translate an uploaded recording, but it is a transcription and subtitle pipeline rather than a study player, so it does not provide per-sentence lookup or vocabulary practice.

02What TanLens is designed for

TanLens handles meetings, livestreams and in-person speech, with 20 languages and automatic source detection. The transcript keeps both languages, the glossary fixes names and course terms, and exports cover SRT, VTT, ASS and TXT. Broadcast rooms let a teacher share captions with students, and a transcript can become study material after class. It runs in the browser on Chrome, Edge, Safari and Firefox, with tab capture in Chrome and Edge through the extension. There is no separate mobile app, so the browser is the whole product.

03Where Trancy is the better fit

If your main activity is studying pre-recorded video and you want dual subtitles integrated with the player, a learning-focused product is the more direct choice. Features built around repeated watching and vocabulary practice are not what TanLens does. As of 2026-11, check Trancy’s current platform support and pricing on its own site, especially if you study on mobile. Neither approach is a substitute for the other; they answer different questions.

Frequently asked questions

Feature

Live caption translation in 20 languages

Feature

Bilingual subtitles that float over the video

Use case

YouTube Live Translation & Real-Time Subtitles

Comparison

TanLens vs Immersive Translate: speech or pages?

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.

Start live captions View pricing