Anki Chrome extension: flashcards from the videos you watch
InterSub works as an Anki Chrome extension for the words you meet in videos. Watch Netflix, YouTube, Udemy or Crunchyroll with dual subtitles, look up a word, star it, and it syncs to an InterSub deck in Anki on your computer and phone. No copying words by hand.
How to send words from videos to Anki
Install InterSub
Add the free InterSub extension to Google Chrome, Microsoft Edge or Firefox from the install page. Right after installation, choose which language to translate from and which to translate into; dual subtitles are on by default.
Save words while you watch
Open a show on Netflix, a YouTube video or a course. Hover over a word in the subtitles: the pop-up dictionary translates it and saves it to your Wordbook. Star the words you want to learn.
Sync with Anki
In Anki, open Tools → Preferences → Syncing, enter https://app.intersub.cc as the self-hosted sync server, click Close, then Sync, and log in with your InterSub email and password. Your starred words appear in the InterSub deck. For Android and iPhone, see the Anki sync guide.
What you get with Anki and InterSub
Review vocabulary from the shows you watch. Every card is a word you met in a real scene, with the line it came from, which makes it easier to remember than a word from a list. Review vocabulary in Anki, then hear it again in the next episode.
You choose what goes into Anki. InterSub saves every word you look up to your Wordbook, a vocabulary builder that fills itself while you watch. Only the words you star sync, so your deck holds the words you want to learn.
Spaced repetition. Each time you remember a card, Anki shows it again later; each time you forget, sooner. Your review time goes to the words you are about to forget, not to the ones you already know.
Your computer and your phone. The same InterSub deck syncs to Anki on desktop, AnkiDroid on Android and AnkiMobile on iPhone and iPad.
Anki + InterSub for any subject. Learning a language from films, following medical school lectures or taking CS50 online: look up the terms you don't know while you watch and learn them in Anki later.
Dual subtitles, the pop-up dictionary, hotkeys and the other tools that fill your Wordbook: see all features.
The best app for language learners ive ever seen
Frequently asked questions
What is Anki?
Anki is a flashcard app for desktop and mobile built on spaced repetition. It schedules reviews by how well you recall each word, so you keep new vocabulary without cramming.
How does InterSub integrate with Anki?
InterSub works as an Anki Chrome extension: it syncs the words you star in your InterSub Wordbook to Anki, where they appear as flashcards in the InterSub deck. Each new sync adds the words you have starred since. Anki sync comes with the Pay-as-you-go and Premium plans, and you can try it during the 14-day Premium trial. See plans and prices.
Which words sync to Anki?
Only the words you mark with a star in your Wordbook. InterSub saves every word you look up, so the star lets you choose what goes into your flashcards. New words can take a few minutes to show up in Anki.
How do I sync my InterSub Wordbook with Anki on Android?
Open AnkiDroid, tap the ≡ menu and go to Settings → Sync. Scroll down to Custom sync server, tap Sync URL, enter https://app.intersub.cc and tap OK. Go back to the main screen, tap the sync button and log in with your InterSub email and password. Your starred words appear in the InterSub deck.
What should I do if my Anki sync isn’t working?
If you see “Conflict between decks on this device and AnkiWeb”, choose “Download from AnkiWeb”: your starred words sync and your existing decks stay as they are. If you signed in to InterSub with Google, Facebook or Chrome and have no password, open your InterSub profile, copy your email and click the pencil icon to set a password. Then log in to Anki with that email and password.
Screenshots and tips are in the Anki sync guide. More questions about InterSub? See all answers in our FAQ.
Other cases
Vocabulary trainer
Practice the words you looked up in our Telegram bot, with spaced repetition.
Pop-up dictionary
Hover over a word in the subtitles or select it on a website to see its meaning in context.
YouTube dual subtitles
Lectures, tutorials and talks on YouTube with two subtitle lines and a pop-up dictionary.
Netflix dual subtitles
Watch Netflix series and films with two subtitle lines and a pop-up dictionary.
Udemy dual subtitles
Dual subtitles and a pop-up dictionary for every Udemy course.
Learn Japanese with anime on Crunchyroll
Watch Crunchyroll anime with Japanese and English subtitles at once.
Get Started with InterSub
InterSub is a free browser extension for Chrome, Edge and Firefox. Install it, connect Anki and turn the words from your videos into flashcards. Anki sync comes with Pay-as-you-go and Premium, and every new account starts with a 14-day Premium trial.