Jul 19, 2026

Intersub

Browser extension for language learning with dual subtitles and instant translations.
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Overview
What is Intersub?

InterSub is a browser extension designed for language learning and skill acquisition. It offers interactive dual subtitles and instant word translations on popular streaming and educational platforms like YouTube, Netflix, Prime Video, Udemy, Coursera, LinkedIn Learning, and TED. InterSub helps users learn new words easily while watching videos, automatically saving viewed words to a personal vocabulary.

Browser extension for language learning with dual subtitles and instant translations.

Core Features
Interactive dual subtitles
Instant word translations
Personal vocabulary tracking
Multi-platform support
Popular Use Cases
  • Learning English, Spanish, and other languages while watching shows on YouTube and Netflix.
How to use
  • Install the InterSub browser extension. Watch videos on supported platforms. Use dual subtitles for native and target languages. Hover over words for instant translations. Review saved words in your personal vocabulary.
Product Timeline
To be verified
Pricing
Intersub uses a Freemium pricing model. Pricing and features may change over time.
Free Plan
$0 /mo
14 day trial of Premium. 15 new word lookups per month, or unlimited with ads. Unlimited dual subtitles without AI translation on-the-fly. Auto-save words to vocabulary (Wordbook). Limited access to vocabulary (Wordbook)
Pay-as-you-go
from $1.5
50, 100, 200, or 500 word lookups. Unlimited access to your Wordbook. Unlimited dual subtitles with AI translation on-the-fly. Weekly frequent words reminders. Limited access to words training mobile apps and bots
premium Plan
from $5 /mo
Unlimited word lookups. Unlimited dual subtitles. Unlimited access to the Wordbook. Weekly frequent words reminders. Access to word training mobile apps and bots
Deal / Coupon
No coupon listed.
Verification
Tool status
To be verified
Pricing verified
To be verified
Founder claimed
No / To be verified
Source
Official website / Community submitted
Related Tags
AI WritingContent GenerationResearchEmail WritingSummarizationRewritingAcademic ResearchBrowser ExtensionFreemium
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