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LeitnerPlus
LeitnerPlus for YouTube and Netflix

Learn languages from the shows you already watch

The extension adds dual subtitles and a hover dictionary to YouTube, YouTube Music and Netflix, and turns the words you save into cards you review with spaced repetition.

See all platformsChrome, Edge and Brave on desktop · Firefox, Safari and Android coming soon

Dual subtitles and a hover dictionary

See each line in the language you learn and in yours. Hover a word for its meaning, part of speech and pronunciation.

The whole video as a transcript

Follow along beside the player, jump to any line, and search what was said. Pinyin, Japanese readings and Korean romanization appear above the line.

Add card from any word or line

One click saves a word, a phrase or a sentence. The card keeps the video and the second it came from.

Words colored by what you know

Saved words keep their color and underline in every video, so new, learning and due words stand apart.

That outfit is way too formal for a picnic, and a bit over the top.

  • New
  • Learning
  • Relearning
  • Review
  • Due

Practice in the extension

Three ways to practice the cards from the video you’re watching, without leaving it.

  • ReviewRate the cards from this video: Again, Hard, Good or Easy.
  • ShadowingHear a line, say it back, and compare.
  • DictationHear a line and type what you hear.

Export subtitles

Download a video’s subtitles as text, CSV, JSON or HTML, or as a deck you can import into Anki.

Export subtitles
  • Text
  • CSV
  • JSON
  • HTML
  • Anki deck
Both languages, with timestamps.

Your cards on the website

Everything you save shows up on leitnerplus.com. Review there with the scene, sort by source and edit any card.

  • outfitdas Outfit, die KleidungDue
  • tackygeschmacklos, kitschigLearning
  • over the topübertriebenReview

Where it runs

Free on every platform. Netflix works on desktop only, because it doesn’t play in mobile browsers.

Available

Windows, macOS and Linux

Chrome, Edge and Brave
  • YouTube
  • Netflix
Add to Chrome (opens Chrome Web Store in a new tab)
How to install
  1. Open the Chrome Web Store listing and choose Add to Chrome.
  2. Pin LeitnerPlus to the toolbar.
  3. Open the extension and choose Connect.
Coming soon

Desktop and Android

Firefox
  • YouTube
  • Netflix: desktop only
How to install
  1. Open the Firefox Add-ons listing and choose Add to Firefox.
  2. Allow it to run on youtube.com and netflix.com.
  3. Open the extension and choose Connect.
Coming soon

iPad, iPhone and Mac

Safari
  • YouTube
  • Netflix: desktop only
How to install
  1. Get the LeitnerPlus app from the App Store. The extension comes inside it.
  2. Turn it on in Settings › Safari › Extensions and allow it on youtube.com.
  3. Open youtube.com in Safari and choose Connect.
Coming soon

Android tablets and phones

Lemur Browser
  • YouTube
  • Netflix: desktop only
How to install
  1. Install Lemur Browser from Google Play.
  2. In Lemur, open the Chrome Web Store and add LeitnerPlus.

Tip: turn on “Desktop site” on youtube.com.

Questions

Is it free?
Yes. The extension and your LeitnerPlus account are free, with every feature.
Which browsers are supported?
Chrome, Edge and Brave on desktop today. Firefox, Safari and Android are coming soon. See Where it runs above.
Which sites does it work on?
YouTube, YouTube Music and Netflix. YouTube Music asks for permission the first time you turn it on.
How do I connect my account?
After you add it, open the extension and choose Connect. A LeitnerPlus tab opens; sign in there and the extension is connected. You can also open the connect page yourself.
Where do my cards go?
To the space you pick in the extension. You can move cards between spaces on the website later.
What about my privacy?
The extension has no analytics or tracking, and translations go from your browser straight to Google. Read what it stores and how to delete it on the extension privacy page.