How to Get Live Translated Captions on YouTube Videos and Streams (Even With No Caption Track)
YouTube’s “Auto-translate” appears only when the video already has a caption track (automatic or uploaded), and automatic captions on live streams are currently limited to English channels with over 1,000 subscribers. For videos and streams without a caption track, use Avoce: open the video tab in Chrome, click the extension, and the audio is translated live into your language with no caption track involved.
YouTube captions and auto-translate: when they exist and when they don’t
According to YouTube’s help pages, automatic captions are produced by speech recognition in 90+ languages, but only in the video’s original language; the viewer-side “Auto-translate” option only appears once a caption track exists. Automatic captions on live streams are being rolled out to English channels only, with conditions such as more than 1,000 subscribers, normal latency (not low latency), and no professional captions; after the stream ends, those automatic captions do not stay on the video.
- Regular videos: most have automatic captions and can then use “Auto-translate”, but quality varies with accents, noise, and overlapping speakers.
- If the creator disabled captions or YouTube did not generate any, there is no “Auto-translate” option.
- Live streams: automatic captions are limited to eligible English channels; streams in other languages mostly have none.
- Automatic captions are in the original language only; translation is a second pass on top of the caption track.
Turn on Avoce captions
- Install the Avoce extension from the Chrome Web Store and sign in once at avoce.ai.
- Open the YouTube video or live stream in Chrome.
- Click the Avoce icon in the toolbar, pick the source language (or auto-detect) and the target language, and start translating the tab.
- Bilingual captions float over the player; drag them out of the way and resize the text. Turn off YouTube’s own captions to avoid two overlapping rows.
- When you are done, export the transcript (txt, Markdown, SRT) as notes.
Built-in captions or Avoce?
| YouTube captions + Auto-translate | Avoce extension | |
|---|---|---|
| Prerequisite | The video needs a caption track; live streams only on some English channels | Any tab with audio: videos and live streams alike |
| Translation source | Recognized into a caption track first, then translated | Translated live straight from the audio |
| Languages | 90+ for automatic captions (original language only) | Chinese, English, Japanese, Korean, Vietnamese, Indonesian, Thai, Spanish, French, German, Arabic, Portuguese, Italian, Hindi |
| Glossary | None | Pin names, brands, and terms |
| Cost | Free | Per-minute points, 1 point = 1 minute, 20 free minutes for new accounts |
| Transcript export | Needs a separate tool | Built-in txt, Markdown, SRT |
Platform-specific notes
The Avoce extension captures the browser tab’s audio: what others say becomes captions, while your own microphone is not part of the tab audio. Captions appear only on your screen and are never sent into the meeting or video, and nothing has to join the call.
- If the video has a caption track, try YouTube’s own free “Auto-translate” first; switch to Avoce when there is no caption track or the stream has no captions.
- Turn off YouTube’s native captions while watching so you do not get two overlapping rows.
- Watching only a segment? Stop when you are done; points are charged for the time actually translated.
- Picture-in-picture or a separate window is fine, as long as that tab is still playing.
A 20-minute video ≈ 20 points, about US$1.2 on the $10.99 / 180-point pack. Transcript-only mode costs a quarter of that (1 point = 4 minutes).
Frequently asked questions
Do I need YouTube Premium?
No. Avoce captures the tab’s audio, which has nothing to do with your YouTube plan.
Can it translate a live stream that has no caption track?
Yes. Avoce translates the audio as it plays and never needs a caption track.
Why is YouTube’s Auto-translate sometimes missing?
Because that video has no caption track: the creator disabled captions, or YouTube did not generate any. Auto-translate works on top of a caption track.
Does it work on my phone?
The extension supports desktop Chrome and Edge only. On a phone, use avoce.ai/live with the microphone.