edX Video Translator
listen and read in your language.
DubTab translates edX lectures in real time — an AI voice dubs the professor in your language while translated captions follow on screen. Use either, or both.
Free 15-minute trial · No credit card · Works with free audit courses
Watch it translate a real course — unedited.
Lectures in your language — not around it.
The transcript is English-only — you decode the lecture instead of learning from it.
Pause, look a word up, rewind 10 seconds, lose the thread. Every few minutes.
A one-hour lecture takes two hours — and half of it never sinks in.
Listen in your language, with translated captions on screen when you want to read along.
No pausing, no dictionary — the AI voice keeps pace with the professor.
Auto catch-up keeps the dub in sync with the video, so the voice never drifts behind the lecture.
Translate an edX video in 3 clicks
1. Add DubTab to Chrome
One click from the Chrome Web Store — the free trial is included.
2. Open any edX course
Play the lecture as usual — verified track or free audit, it doesn't matter.
3. Turn on dub & captions
Pick your language once. The AI voice and translated captions start within seconds.
Built for studying, not just translating
Real-time AI dubbing
The voice speaks while the video plays — not a file you upload and wait for.
Translated captions too
Read along with the dub, or use captions on their own — both follow the lecture live.
Stays in sync automatically
Auto catch-up keeps the dub aligned with the video, so the voice never lags behind the professor.
No transcript needed
DubTab listens to the audio itself, so videos without subtitles still work.
Also on Coursera & more
One extension covers edX, Coursera, Udemy, YouTube and most video sites.
Windows desktop app included
Dub anything beyond the browser — local videos, meetings, any app's audio.
Doesn't edX translate courses itself?
Barely. edX's official Xpert AI translation covers two languages — and only if you paid for the verified track.
| Language | edX official (Xpert) | DubTab |
|---|---|---|
| Spanish | Verified track only | ✓ Real-time, any course |
| Arabic | Verified track only | ✓ Real-time, any course |
| Chinese | Not available | ✓ Real-time, any course |
| Japanese | Not available | ✓ Real-time, any course |
| Korean | Not available | ✓ Real-time, any course |
Changed your edX interface language? The videos stay English.
edX's language setting translates menus, not lectures. DubTab is the missing half: it translates the professor's voice itself, live.
Auditing for free? You get no official translation at all.
Xpert translations are reserved for paid verified learners. DubTab works the same on audit courses — CS50, MITx, HarvardX, all of them.
Most edX videos have English transcripts — but only English.
The interactive transcript is great if you read English fast. If you don't, DubTab gives you the same lecture in your language — spoken, captioned, or both.
Frequently asked questions
Your next edX course, in your language.
Install once — it starts dubbing the moment the professor starts talking.
Add to Chrome — FreeFree 15-minute trial · Works on Edge too · Windows app available