A browser extension for learning Dutch
Learn Dutch by reading what you'd read anyway.
Leesje quietly underlines the Dutch words you don't know yet — on any page, in any tab — so the news, the recipe, the forum post you were already reading becomes the lesson.
Add to Chrome — it's free
Also works in Edge. No account needed to start.
Het weer wordt woensdag grillig
Vandaag is het bewolkt met af en toe zon. In het noorden kan het opklaren, maar in de avond is er kans op buien.
opklaren
to clear up
Known
Study
1,240words known
37on this page
92%page understood
How it works
One click on a word is the whole lesson.
No flashcard deck to open first, no separate app to remember to use. Leesje meets you on the page you're already on.
1. It underlines what's new
Every word you haven't marked known gets a quiet mark — nothing else on the page changes.
Vandaag kan het in het noorden opklaren.
2. You tap it, once
The translation and a second real example sentence show up right there, no lookup required.
uitlatento walk (a dog)
3. It comes back on schedule
Send it to your deck and spaced repetition brings it back right as you're about to forget it.
uitlaten
Beginner · due in 8h
What's inside
Everything past the highlight.
The underline is where it starts. What happens after is the rest of the app.
- FlashcardsEvery word you send to your deck gets scheduled with spaced repetition — sooner if you struggled, later if you didn't.
- Four trainersDe/Het, past tense, fill-the-gap, and word order — short drills built from words you've actually seen.
- Clipboard readerPaste in a text from anywhere — a lyric, an email, a textbook page — and read it the same way.
- Progress you can seeA daily streak, a review chart, and a page-by-page comprehension score that actually moves.
This week
Words marked known18
Cards reviewed142
Day streak6
Page comprehension, average81%
Download
Get Leesje wherever you read.
The extension does the reading and highlighting. The phone app keeps your deck with you for reviews on the go — same account, same words, synced.
iOS
Review your deck on the go. In review with Apple — not out yet.
Android
The same deck, the same reviews. Wrapping up testing now.
