llms.txt
# Sublern
> Free browser extension that gives instant word translation, pronunciation and real-world examples when you hover any subtitle word while watching videos.
Sublern is a browser extension for language learners. It works on YouTube, Netflix, TED, Udemy, Rutube, Disney+, Prime Video, Twitch, Plex, Jellyfin and any site using Video.js, Shaka Player or Playerjs.
Available for Chrome, Firefox and Microsoft Edge.
## What it does
- Hover any subtitle word → instant translation popup appears on top of the video
- Translation covers 30 target languages
- Shows 3 real-world example sentences from native content
- Text-to-speech pronunciation by a native voice (one click)
- Auto-pauses the video while you read, resumes when you move on
- Save words to a personal vocabulary dictionary for later review
- Keyboard shortcuts for all major actions (no mouse required)
- Fully customizable: font size, position, colors, background opacity, example count
## Interface languages
English, Russian, Ukrainian, German, French, Spanish, Italian, Portuguese, Polish, Romanian, Dutch, Chinese (Simplified), Japanese, Arabic, Hebrew, Turkish.
## Pricing
Free. No account required. No premium tier. No ads.
## Extension links
- Chrome Web Store: https://chromewebstore.google.com/detail/gmmnakjodfopdbbjclnlaaaomngomaif
- Firefox Add-ons: https://addons.mozilla.org/en-US/firefox/addon/sublern/
- Microsoft Edge Add-ons: https://microsoftedge.microsoft.com/addons/detail/sublern/mjhlabbcmjflkpjknnicihkfnmbdfced
## Website
https://sublern.pro
Blog: https://sublern.pro/blog
Supported languages: en, ru, uk, de, fr, es, it, pt, pl, ro, nl, zh, ja, ar, he, tr
