Extract vocabulary words with definitions
Get a learner-friendly word list with definitions, difficulty, and example sentences — built for ESL.
This free tool scans any YouTube video and pulls out the key vocabulary words — each with a definition, a difficulty indication, and an example sentence drawn directly from the video. Great for language learners studying authentic content, students tackling academic vocabulary, or anyone who wants to build subject-matter fluency from video.
How to build vocabulary from a YouTube video
- 1Paste the video URL — a lecture, documentary, interview, or language-learning video.
- 2Extract the vocabulary — the tool identifies notable words, defines them, and shows how they're used in the video.
- 3Study or export — review in the browser or copy the word list into flashcards, a doc, or a study app.
Why use it
- Words in real context — every word comes with the sentence it appeared in — far stickier than a dictionary list.
- Difficulty flagged — spot which words are basic review and which are genuinely new.
- Export to flashcards — copy the word list straight into Anki, Quizlet, or the Flashcards tool above.
- Free — no account.
Frequently asked questions
How does the tool decide which words to extract?+
It identifies words that are significant to the video's topic — domain-specific terms, higher-register vocabulary, and words unlikely to be known by a general audience — rather than pulling every word or just high-frequency stopwords. Common words like "the" or "and" are filtered out.
Is this good for language learning?+
Yes — it's well-suited to learners studying authentic native-speaker content, since every word comes with a real example sentence from the video rather than a textbook definition. It works best on content that is mostly talk-heavy (interviews, vlogs, podcasts) where natural vocabulary appears in full context.
Does each word come with an example sentence?+
Yes — each entry shows the sentence or phrase from the video where the word appeared, so you see it used the way a real speaker uses it, not just an abstracted definition.
Can I export the vocabulary list to Anki or Quizlet for flashcard study?+
The output is plain text you can copy directly. Paste into Anki's import dialog (tab-separated) or Quizlet's import function. For a ready-made card set from the same video, try the [Flashcard Generator](https://veridive.com/tools/flashcards) alongside this tool.
Is the vocabulary builder free?+
Yes — completely free, no account, no sign-up. Extract vocabulary from as many videos as you need.
Do I need to create an account or install anything?+
No — it's a browser-based tool. Paste a URL on desktop or mobile; no extension required.
Does it work on videos without captions?+
It reads the video's transcript, so captions are required. Most public videos have auto-generated captions. Note that auto-captions can mishear proper nouns and technical terms — always verify any word you plan to study against the audio.
Which languages does the vocabulary extraction work for?+
The tool works on videos in English. Results for videos in other languages depend on caption quality and may be less reliable — we don't officially claim support for other languages at this time.
Does it rate words by difficulty?+
Yes — each word gets an indication of difficulty (e.g. basic, intermediate, advanced) so you can focus study time on genuinely unfamiliar terms rather than words you already know.
Can I build vocabulary from across an entire channel or series?+
This free tool handles one video at a time. [veridive](https://veridive.com) lets you save many videos and query across them — useful for systematically building vocabulary from a whole course or content series.