DubMog turns an online course's audio into your language while the class plays. It's a real-time AI dubbing extension for Chrome and Microsoft Edge: open a lecture on Udemy, Coursera, edX or your school's course site, pick your language, and listen — no subtitles to read. Here's what real-time dubbing is, why listening helps you learn, and how to set it up in a minute.
What real-time dubbing is
Real-time dubbing means speech is translated and spoken in another voice while the video is still playing — a couple of seconds behind the speaker, not after you upload a file and wait. DubMog recognises what the instructor says, translates it, and speaks it in your language with a natural AI voice. The original audio ducks underneath while the translation speaks, and a live transcript runs in the side panel.
It's AI video dubbing for the tab you're watching: speech-to-speech translation you listen to, instead of a video translator you have to read. More about speech-to-speech translation →
Why listening beats subtitles for learning
- Your eyes stay on the lesson. Slides, code and diagrams need your eyes. With voice translation you follow the explanation by ear instead of splitting your attention between the demo and a line of captions.
- You keep up with the class. Dense lectures are hard to read and follow at the same time. Hearing them in your language lets you learn at the instructor's pace.
- No captions needed. Many courses have subtitles in only one or two languages. DubMog works from the audio itself, so a course with sound can be dubbed — in 80+ languages with Pro Live.
How to dub a course, step by step
- Install DubMog from the Chrome Web Store — or from Microsoft Edge Add-ons if you use Edge. It's free.
- Open the course — a Udemy lecture, a Coursera video, an edX class or your school's course page — and start the video.
- Click the DubMog icon in the browser toolbar to open the DubMog panel.
- Pick your language, choose Standard or Pro Live, and press Start. DubMog dubs the tab you started it on.
Reading this on your phone? Browser extensions install on a computer — tap either button and send yourself the link.
Standard or Pro Live?
The extension has two modes. Start with Standard — it's free — and switch to Pro Live when you want the natural AI voice or a language Standard doesn't cover on your computer.
| Standard | Pro Live | |
|---|---|---|
| Price | Free | Uses DubMog minutes |
| How much | 30 minutes a day without an account; unlimited with a free account | As long as your minutes last — Live counts 3× the clock |
| Voice | Your browser's built-in voice | A natural AI voice |
| Languages | 20+ video languages, depending on your computer | 80+ languages |
| Speech recognition | Chrome: on your computer. Edge: Microsoft's online speech service (the tab's audio goes to Microsoft) | In the cloud — faster, nothing to download |
| Try it | Free | A free taste, a few tries a day |
Prices: Pro is $9.99 a month (600 minutes a month, about 200 minutes of Live) or $79.99 a year. Minute packs: 60 minutes for $1.99 (about 20 minutes of Live) and 180 minutes for $4.99 (about 60 minutes of Live); packs never expire. Checkout is in your local currency where available.
One account — Google, Apple or email — keeps your minutes and Pro in sync with the DubMog apps on iPhone and Android and at get.dubmog.com.
Tips for dubbing a course
- Use headphones. You'll hear the translated voice clearly over the ducked original.
- Keep the course tab open. DubMog dubs the tab you started it on, so leave that tab open while you learn.
- Long lectures are fine. There's no per-video limit — a two-hour section works like a short clip.
- Check a word in the transcript. The live transcript in the side panel lets you glance back at something you missed.
What works — and what might not
Works: any site whose video plays ordinary sound in the tab. Translate YouTube videos, dub online courses on Udemy, Coursera, edX and school platforms, and follow lectures, webinars, podcasts and live streams in your language.
Streaming services: DubMog makes no promise about any particular service. Netflix, Hulu, Disney+, Crunchyroll and other paid services protect their videos with DRM, and a protected player can hand extensions silent audio — when that happens, DubMog detects it and tells you instead of pretending. Standard is free, so trying it on what you're watching costs nothing. For videos you own, use DubMog Web Studio in your browser or the DubMog app.
Quick answers
Does DubMog work on Udemy and Coursera?
Yes. The DubMog extension for Chrome and Edge dubs online courses on Udemy, Coursera, edX and school course platforms while the class plays, and it works on any site whose video plays ordinary sound in the tab. If a site protects its audio, the tab comes through silent and DubMog tells you.
Is there a video length limit?
No. The DubMog extension has no per-video limit, so a two-hour lecture works as well as a short clip. Standard is free — 30 minutes a day without an account, unlimited with a free account — and Pro Live is limited only by your minutes.
Do I need to read subtitles?
No. DubMog speaks the translation over the video in a natural AI voice, so you listen in your language instead of reading captions. The live transcript is optional — it's there if you want to check a word.
Is DubMog free on Chrome and Edge?
Yes. The extension is free to install and Standard mode is free: 30 minutes a day without an account, unlimited with a free account. Pro Live uses DubMog minutes — Pro is $9.99 a month, and minute packs start at $1.99.
Get DubMog
Free for Chrome and Microsoft Edge. New to the extension? Read the DubMog for Chrome launch post.
DubMog is also free on iPhone and Android, with the same account.