Websites
Articles, docs, forums — a language learning browser extension works on anything you read. Nothing to set up per site, designed to work without changing the page layout.
The language learning Chrome extension that turns browsing into vocabulary
Select any word on any page — see the translation instantly, hear it spoken, and save it with the context you met it in.
Works on any site, YouTube and PDF
https://wordbyword.io/demo
Nuances révélées par chaque mot
Apprendre des mots étrangers, c'est élargir délibérément son horizon intérieur. Chaque terme nouvellement acquis révèle une perspective insoupçonnée et transforme subtilement notre manière de percevoir le monde. À mesure que le lexique s'enrichit, la pensée gagne en justesse et en clairvoyance, en discernement, ouvrant la voie à une compréhension plus profonde et plus nuancée de la réalité qui nous entoure. Cette quête perpétuelle de savoir enrichit l' esprit...
63%
You understandthis page
“This word again. I looked it up already.”
From the page you’re reading to the words you know
Trainings run on the website — the extension is your collector.
- 01
Spot the words you don’t know
Spotlight colors them right in the text, so you see the gaps before you stumble into them.
- 02
Translate in one click
Select the word or double-click it: up to ten meanings, pronunciation, your own variant — saved together with the context it came from.
- 03
Rate it, and let it settle
Mark how well you know the word, from 1 to ✓. Trainings take it from there and bring it back right before you would forget.
flâner
Translation
A dictionary Chrome extension behind every word
Every popup is a full dictionary, not a one-line translation: up to 10 meanings as tappable chips, your own translation if you know better, pronunciation on the V key — male or female voice. Switch the language pair right in the popup.
Ce matin, les pêcheurs remontent leurs filets, et le marché ouvre sous un ciel nuageux. Quelques habitants flânent déjà le long du rivage.
Spotlight Mode
Spotlight turns every page into a map of your vocabulary
Turn on Spotlight and the page becomes a map of your vocabulary. Blue — words you haven’t met yet. Shades of orange — words you’re learning. No highlight — words you own. Works on articles, YouTube subtitles and PDFs, and updates the moment you save a word.
Comprehension
Will you understand this page? Know before you start
WordByWord scores any article, video or PDF against your vocabulary — not an abstract difficulty level. 95%+ is easy reading, 85–94% is your sweet spot, below 70% — maybe later. And it shows the shortest way up: “these 11 words add +6% understanding of this video.”
Le soleil se couche derrière le rivage, et la mer devient calme.
Pick a status — the word changes color in the text
Word statuses
Every word carries its status, from 1 to ✓
New, recognized, familiar, learned, known — five steps from first meeting to full ownership. Set them with keys 1–5 right in the popup, or let trainings move words up automatically.
A Chrome extension for language learning on every page you already visit
Books and papers open in WordByWord’s own viewer, because Chrome doesn’t let extensions translate inside the standard one. Local files included.
YouTube
Interactive subtitles: click any word to translate, the video pauses itself and resumes when you’re done. Jump between lines with ← →.
Why this language learning extension stays installed
Hear every word
Natural voices, male or female, for a single word or a whole sentence. HD voices come with Premium.
Learn in 50+ languages
From Spanish and Japanese to Icelandic and Swahili — learn several in parallel, the extension keeps them apart.
Unlimited basics, free
Translations and audio don’t run out.
Your words, exportable
Anki, CSV or printable PDF, any time.
Questions about the extension
The extension is free, translating and listening are unlimited. A free account adds saving and Spotlight; Premium removes monthly limits on trainings and AI — see pricing.
One click in the Chrome Web Store. Open any page, select a word — that’s the whole setup.
Any website, YouTube (with interactive subtitles) and PDFs in the built-in viewer. Netflix isn’t supported yet.
50+, from Spanish and Japanese to Icelandic and Swahili — several at once if you like. Here is the full list of supported languages.
Into your vocabulary on wordbyword.io: collections, statuses, trainings — and export whenever you want.
No. The overlay lives in an isolated layer and can’t interfere with a site’s own code or styles.
The extension handles the hardest part: turning what you already read and watch into your personal vocabulary. Add trainings on top, and words move from “seen once” to “known” — that’s comprehensible input plus spaced repetition, the two methods with the strongest evidence behind them.
Most extensions stop after showing a translation. WordByWord also saves the word with its context, tracks your progress and turns it into flashcards and spaced-repetition exercises.
Put your vocabulary on every page
Install in 10 seconds, select your first word, and let the web teach you. Your saved words will be waiting in the vocabulary trainer.
Works on any site, YouTube and PDF