For courses, lectures and webinars, in Chrome
Translate online courses and lectures as they play
No subtitles in your language? DubBuddy dubs what the teacher says, as the lesson plays.
DubBuddy listens to the lesson in your tab and speaks it in your language about 3 seconds behind, with the teacher’s voice underneath. Or read along: each sentence appears with its translation, and the transcript stays for your notes.
DubBuddy is a Chrome extension for computers. It does not run on phones or tablets.
How to follow a course in your language
The full setup guide- 1
Add DubBuddy and paste a Gemini key
Once: add the extension to Chrome on your computer and paste a key from Google AI Studio on its welcome page.
- 2
Play the lesson in Chrome
On the course site, or wherever the video is embedded, on your computer. Pause and rewind as usual: DubBuddy follows what the tab plays.
- 3
Click the DubBuddy icon and press Start
The side panel opens. Pick your language under “Translate to” and press Start. With the panel open, the icon or Alt+Shift+D starts at once.
- 4
Keep the transcript
Switch the mode to Transcript before Start. After Stop, copy the lines or save them as a text file, each with its time; History keeps them on this device too.
Where we tested it
Tested by hand on 8 November 2026, in Chrome on a Mac, with Transcript only and a translation. Sites change their players; one that is not in this table may work too.
| Site | What played | Result |
|---|---|---|
| Udemy | What played: A free preview lesson on a course page, without an account | Result: Works. Lessons inside a paid course were not tested. |
| TED | What played: A talk on ted.com, after its ad | Result: Works |
| Vimeo | What played: A public video; many course and webinar videos are hosted there | Result: Works |
Not tested: lessons on Coursera, edX and LinkedIn Learning, which need an account; Skillshare and Khan Academy; webinar platforms that need registration; and the web versions of Zoom, Google Meet™ and Microsoft Teams. A player protected against copying (DRM) gives DubBuddy no sound.
Udemy, TED, Vimeo and the other names here belong to their owners; DubBuddy is not affiliated with them.
Webinars
- Watch the webinar in its web version, in a Chrome tab: DubBuddy hears tabs, not desktop apps.
- In a question-and-answer part, other people’s voices go to Google too. For meetings or anything private, turn billing on: on the free tier, Google may use the audio and people at Google may read it.
- Meetings: Google Meet™, Zoom and Microsoft Teams, on the home page.
Tips for lessons
- Playing faster costs less: Google bills by the minute of audio sent, so an hour of video played at 2× is billed as about 30 minutes. The dub is about $2.21 an hour at Google’s paid-tier prices on 30 October 2026 (Google’s price list ↗).
- Rewinding sends that part again, and it is billed again.
- If DubBuddy takes the lesson for another language, set the spoken one under “Spoken in”, in Transcript only.
- A session lasts up to 150 minutes; press Start to go on.
Course questions
On the free preview lessons of a Udemy course page, yes: we tested them, without an account, on 8 November 2026. Lessons inside a paid course were not tested; a player protected against copying gives DubBuddy no sound.
Their lessons need an account, so they were not part of our test. A lesson that plays with sound in a Chrome tab, and is not protected against copying, is heard the same way as any other.
Yes. In Transcript only, each line appears as it is said, with its translation under it if you like, and stays in the panel after Stop. Copy the lines, or save them as a text file, each with the time since Start; History keeps them on this device too. DubBuddy saves text, not subtitle files.
In its web version in Chrome, yes: DubBuddy hears the tab, not desktop apps. Other people’s voices in a question-and-answer part go to Google too. For meetings or anything private, turn billing on: on the free tier, Google may use the audio and people at Google may read it.
DubBuddy charges nothing. Google bills your key: about $2.21 an hour for the dub at its paid-tier prices on 30 October 2026, about a quarter of that for Transcript only. Played at 2×, an hour of video is billed as about 30 minutes.
No. DubBuddy is a Chrome extension for computers, and Chrome on phones runs no extensions.
Follow your next lesson in your language
Add DubBuddy to Chrome, paste a Gemini key, and press Start when the lesson plays.
DubBuddy is a Chrome extension for computers. It does not run on phones or tablets.