InterSub
Browser extension for learning languages with dual subtitles and hover translation
Introduction
InterSub shows subtitles in your native and target languages at the same time on sites like YouTube, Netflix, Prime Video, Udemy, Coursera, LinkedIn Learning and TED. Hovering over a word gives an instant translation, and looked-up words are saved to a personal vocabulary list.
- Added on
- Nov 2, 2026
- Website
- intersub.cc
- Pricing model
- Freemium
Product information
What is InterSub?
InterSub is a browser extension for Chrome, Edge and Firefox that supports language learning through interactive dual subtitles and instant word translations on streaming and course platforms.
How to use InterSub?
Install the extension, watch videos on a supported platform, turn on dual subtitles, hover over words for translations and check saved words in your InterSub Dashboard.
Core features of InterSub
- Interactive dual subtitles
- Instant word translation
- Personal vocabulary tracking
- Multi-platform support
Use cases of InterSub
- 1Learning English, Spanish or other languages while watching YouTube and Netflix
Frequently asked questions about InterSub
Which browsers does InterSub support?+
Google Chrome, Microsoft Edge and Firefox.
Where do the words I look up in InterSub go?+
They are saved automatically to your vocabulary in the InterSub Dashboard.
Which category is InterSub in?+
InterSub is listed under AI Translator.