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Sublern

Translate any word in video subtitles with one hover

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What is Sublern?

Sublern is a Chrome extension that enables instant word translation directly from video subtitles. While watching videos on YouTube, Netflix, TED, and 10+ other platforms, you can hover over any subtitle word to see its translation, example sentences, and pronunciation. This removes the friction of pausing videos, opening dictionaries, or searching for terms separately. It is particularly useful for language learners who want to understand content in their target language without constant interruption. The extension works smoothly within your browser and requires no setup beyond installation. All translations are provided at no cost.

Key features

Hover-to-translate

Point at any subtitle word to instantly see its definition and translation

Pronunciation guides

Listen to correct pronunciation of words directly from the extension

Example sentences

View contextual examples showing how words are used in real situations

Multi-platform support

Works on YouTube, Netflix, TED, and more than 10 other video sites

No interruption

Translate without pausing or leaving your video

Free and simple

No account required, no hidden features locked behind payment

Pros & cons

Advantages

  • Completely free with no ads or premium paywalls
  • Works across many popular video platforms without switching tools
  • Includes pronunciation so you learn correct speaking, not just reading
  • Example sentences help you understand context and usage
  • Very easy to use; hover is faster than typing in a dictionary
  • Helpful for passive language learning while consuming content you enjoy

Limitations

  • Chrome extension only; unavailable for Firefox, Safari, and other browsers
  • Only works when video captions are present and properly formatted
  • Translation quality depends on the underlying language data, which may vary by language pair
  • Does not provide audio-based translations or speech recognition

Use cases

Learning a new language through watching films, TV shows, or documentaries

Understanding educational videos in your target language without constant pausing

Expanding vocabulary whilst watching international content

Supporting ESL and EFL learners studying English through media

Researching foreign-language content for academic or professional purposes

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Free

All features included: hover translation, pronunciation, example sentences, multi-platform support

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Get Sublern
  • Always free
  • No credit card