Yay, you can now translate words in video subtitles and on websites!

Where to watch

  • YouTube

    A site that needs no introduction :) Turn on YouTube dual subtitles on any video, and translate YouTube subtitles with AI when there are none in your language.


    What to do:

    • go to youtube.com, select the video,
    • enjoy watching and learning.
  • Netflix

    The world's most popular streaming service. Thousands of movies, shows, documentaries, and TV shows for every taste. Netflix dual subtitles show the original line and its translation together, so language learning with Netflix fits into your evening.


    What to do:

    • go to netflix.com, select a video,
    • if needed, choose audio in a language you are learning, e.g. English,
    • enjoy!
  • Amazon Prime Video

    Yet another famous streaming service with tons of movies, documentaries, TV shows etc. Prime Video dual subtitles work on movies and series alike.


    What to do:

    • go to primevideo.com, select a video,
    • choose audio in a language you are learning, e.g. Spanish,
    • that's it!
  • HBO Max

    One more big-name streaming platform packed with iconic series, blockbusters, original shows, and exclusive Warner Bros. content. HBO Max dual subtitles work on every show.


    What to do:

    • go to play.max.com, select a video,
    • choose audio in a language you are learning, e.g. Spanish,
    • that's it!
  • Crunchyroll

    Enjoy the largest collection of anime in one place. Now you can feel more confident watching videos that don't have dubbing/subtitles in your language, using English instead, which is always available. Learn Japanese with anime: Crunchyroll AI subtitles fill in the second line when your language is missing.

    What to do:

    • go to crunchyroll.com, select a video,
    • if needed, choose a language of audio in which you'd like to watch it,
    • enjoy your fav anime!
  • Bilibili.tv

    One of the largest video platforms for anime, Asian dramas and creator videos. Bilibili dual subtitles make it a good place to learn Japanese, Chinese or Korean.

    What to do:

    • go to bilibili.tv, select a video,
    • choose the subtitle language you're learning if needed,
    • enjoy watching and learning!
  • Coursera

    The most popular learning platform. Coursera dual subtitles help you follow lectures in the language you're learning.


    What to do:

    • go to coursera.com, select the course, and start watching the first lesson,
    • done!
  • Udemy

    The another cool learning platform. Udemy dual subtitles help you follow courses in English or another language you're learning.


    What to do:

    • go to udemy.com, select a course you'd like to learn,
    • start watching the first lesson,
    • you are all set!
  • LinkedIn Learning

    Learning platform from the #1 business social network. LinkedIn Learning dual subtitles help you take courses in the language you're learning.


    What to do:

    • go to linkedin.com/learning, select the course, and start watching the first lesson,
    • done!
  • TED

    TED (Technology, Entertainment, Design) is a famous global non-profit organization that hosts conferences with the aim of spreading worthwhile ideas through short, powerful talks. TED dual subtitles turn every talk into listening practice.

    What to do:

    • go to ted.com, select a video,
    • Yo are all set!
  • Domestika

    One of the largest platforms for creative online courses – design, illustration, photography, marketing, and more.

    What to do:
    • go to domestika.org, select a course and start the first lesson,
    • you are all set!
  • DW Learn German

    Free platform from Deutsche Welle offering structured courses, videos, and exercises to learn German at all levels.

    What to do:

    • go to learngerman.dw.com, choose a course or video lesson,
    • start learning right away!
  • Learn.cantrill.io

    A popular platform with in-depth courses on AWS and cloud technologies created by Adrian Cantrill.

    What to do:

    • go to learn.cantrill.io, pick a course and open the first lesson,
    • enjoy learning!
  • Shahid

    The leading Arabic streaming platform with movies, TV series, shows, and exclusive originals from MBC.

    What to do:

    • go to shahid.mbc.net, select a movie or series,
    • switch site language to English or French if neede,
    • sit back and enjoy!

How to watch

Hover over an unfamiliar word

Hover over an unfamiliar word

Hover over a word in the dual subtitles and the rest happens by itself:
  • the video pauses,
  • a pop-up dictionary shows the translation and what the word means in this scene,
  • the word is saved to your Wordbook.
Move the cursor away and playback continues. Prefer clicking? Turn off hover in Settings and double-click a word or select a phrase instead.
Rewind a line and pause

Rewind a line and pause

Missed a word? Press ← on the keyboard or the arrow to the left of the subtitle to jump back a line.

Press Space to pause or play.
Quickly review your latest words

Quickly review your latest words

Click the IS icon in the browser bar to open the extension window: your latest and most frequent words, plus the settings.
AI subtitle translator adds a translated second subtitle line

No subtitles in your language?

InterSub can translate subtitles with AI on the fly and show the translation as the second line. If the platform's subtitles in your language follow the dub and don't match what is said, turn on forced AI translation in Settings. The AI subtitle translator comes with every paid plan and the free trial.
Translator extension: a phrase in a news article translated from English to Spanish

Translate words on any website

Select a word or phrase on any page, or double-click a word, and the translation pops up with its context. It works as an instant translator for articles and as a YouTube translator extension for comments and video descriptions.
Remote Control for looking up words without getting off the couch

Remote Control for looking up words without getting off the couch

Look up the words from your smartphone. Scan the QR code on the video with your phone's camera and follow the link to Remote Control. Yay! Now you can pause or rewind the video and translate the words in the current subtitle from your phone!
Use hotkeys like a pro

Use hotkeys like a pro

  • ← / → rewind and fast-forward, Space pauses and plays
  • = / − make the main subtitles bigger or smaller; add Shift for the second line
  • ↑ / ↓ move subtitles up or down
  • Ctrl+I (Cmd+I on Mac) turns InterSub on or off on any site
  • S turns shadowing on or off
  • D turns dual subtitles on or off

How much is it

  • Free Plan

    • 14 day trial of Premium.
    • 15 new word lookups in subtitles and on websites per month
    • Unlimited dual subtitles, without the AI subtitle translator
    • Auto-save words to your vocabulary builder (Wordbook)
    • Limited access to vocabulary (Wordbook)
    $0 /mo
  • Pay-as-you-go

    • 50, 100, 200, or 500 word lookups in subtitles and on websites or requests to AI Language buddy
    • Unlimited access to your Wordbook
    • Unlimited dual subtitles with the AI subtitle translator
    • Weekly frequent words reminders
    • Limited access to words training mobile apps and bots
    from $1.49
  • Premium Plan

    Unlimited word lookups

    Unlimited dual subtitles

    Unlimited access to the Wordbook

    Weekly frequent words reminders

    • Access to word training mobile apps and bots
    from $6 /mo

What else you can do

Register

Register

What you get:
  • a personal account with all the words you looked up, their translations and export,
  • a 14-day free trial of Premium with every InterSub feature, AI subtitle translation included.
Practice saved words in Anki or our Telegram bot

Practice saved words in Anki or our Telegram bot

Your Wordbook is a vocabulary builder that fills itself while you watch. To learn new words from it, use Anki, our Telegram bot or another connected app.

Using a different app? Export your words as an Excel file and load them into it.
Spread a word about us and earn bonuses

Spread a word about us and earn bonuses

How it works:
  • someone signs up through your affiliate link,
  • when they pay for a subscription, we give them two extra weeks of access for free, and you get $5 in bonuses,
  • you can use the bonuses to pay for your subscription or withdraw them.

A video platform site doesn't open

Try with VPN

Try with VPN

If you already have a VPN, you know what to do. If not, install one, for example CyberGhost VPN (formerly ZenMate): it is free with some speed limits.

If the video lags, watch a couple of seconds with the VPN on, then pause, turn the VPN off and keep watching.