2026 roundup

Best Chrome extensions for vocabulary

How the top vocabulary extensions compare: in-page lookup, AI tutoring, flashcards, and video mining — including Vocabulary Mastery, eJOY, Relingo, Migaku, and Immersive Translate.

Add Vocabulary Mastery to Chrome See Vocabulary Mastery

A “vocabulary extension” can mean three different products: a popup dictionary, a flashcard miner, or a tutor that makes you use the word. Mixing those jobs is why comparison tables feel unfair.

This guide groups Chrome extensions by what happens after you click a word. Translation-only tools are listed so you do not install a tutor when you wanted a gloss, or the reverse.

The shortlist

Each tool wins a different job. Rank yourself by platform and review style, not by a single score.

Vocabulary Mastery

Learn the word in this sentence, practice it, review in a story

YouTube: Companion: TalkClips Captions

Web: Select on any webpage, AI definition, sentence feedback, mastery levels

Watch-out: Not a full-page translator. Not Anki.

eJOY English

Dictionary plus games and saved-word review

YouTube: Video features available

Web: Hover lookup and word bank

Watch-out: Heavier product if you only wanted in-context tutoring.

Relingo

Video + web vocabulary in one brand

YouTube: Dual subtitles

Web: Page lookup

Watch-out: Compare review depth with a dedicated tutor loop.

Migaku

Mining to Anki / hardcore SRS

YouTube: Yes

Web: Yes

Watch-out: Highest power, highest setup.

Immersive Translate

Reading foreign pages with bilingual translation

YouTube: Not its main job

Web: Excellent page and document translation

Watch-out: Translation is not the same as vocabulary mastery. Pair with a tutor if words do not stick.

Language Reactor

Vocabulary that starts from Netflix/YouTube subtitles

YouTube: Excellent

Web: Not a general webpage tutor

Watch-out: Wrong tool if your problem is articles, not episodes.

How to choose

You read a lot and forget words by the next page

You need save + review, not only hover. Vocabulary Mastery, eJOY, Relingo, or Migaku. Immersive Translate alone will not close the loop.

You watch more than you read

Start with a YouTube caption extension (see the YouTube roundup), then add a webpage tutor if you also browse.

You already live in Anki

Migaku or Language Reactor export will fit better than TalkClips until we offer export.

You want AI to check a sentence you wrote

That is Vocabulary Mastery’s gap versus most dictionaries. You look up, then produce, then get feedback.

FAQ

What is the best free vocabulary Chrome extension?

Most serious tools have a free tier and a paid cap. Vocabulary Mastery can be installed free; AI volume follows your TalkClips plan. Compare limits on each Chrome listing rather than assuming “free” means unlimited.

Is a translator enough to learn vocabulary?

It is enough to understand the page. Retention usually needs retrieval — a story, a card, or a sentence you produce. That is the difference between Immersive Translate and a tutor extension.

Can I learn vocabulary from YouTube and from articles together?

Yes with TalkClips: TalkClips Captions on YouTube and Vocabulary Mastery on the web share one account and one word list.

Start with Vocabulary Mastery

Select any word while you browse. Get AI definitions, practice sentences, and review with stories that use your saved vocabulary.

Add Vocabulary Mastery to Chrome

Vocabulary MasteryOur webpage tutor Best YouTube language learning extensionsVideo half of the same problem eJOY alternativeDictionary-plus-games comparison Migaku alternativeWhen you do not want Anki