Learn Korean from the shows and videos you already love.
Hover any word to understand it. Save the words and sentences you almost get. Review them a little each day.
Rest your mouse on a word. Save the sentence. Review it later.
Three small habits. Real Korean.
You learn words best inside sentences you nearly understand. Jupjup finds those sentences for you and makes saving them effortless.
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1Hover to understand
Rest your mouse on any Korean word — on a website, in a subtitle — and see what it means and how it's built.
2Spot the new word
When a sentence has just one word you don't know yet, Jupjup gently underlines it. Those are the easiest to learn.
3Save, then review
One click saves the sentence and a link back to the moment you heard it. A few minutes of review a day makes it stick.
Anywhere there's Korean.
Clickable subtitles on your favorite streaming sites, and word lookups on any page.
A word in a sentence is a word you remember.
Lists of words fade. A sentence from a scene you watched brings back the voice, the moment, and the meaning. Jupjup keeps each one together with a link to where you found it.
The details, if you care about them.
Jupjup is built on the same ideas many fluent learners swear by: comprehensible input, sentence mining, and spaced repetition.
- i+1 detection
- Every sentence on a page is checked against the words you know. Sentences with exactly one unknown word are marked; sentences full of unknowns are left alone.
- Known-word tracking
- Start from the National Institute of Korean Language's 5,800 learner words (choose 300 to all), then fine-tune by marking words as you go. Words you've reviewed for three weeks count as known automatically.
- Real morphological analysis
- Conjugated forms are split into stems, particles, and endings (먹었어요 = 먹 + 었 + 어요) with the dictionary form, so lookups and known-word tracking work on lemmas, not spellings.
- FSRS scheduling
- Reviews use FSRS-6, the open algorithm built into Anki. Set your target retention (90% by default) and daily new-card limit.
- Sentence cards with context
- Each card keeps the sentence, the target word or grammar pattern, its breakdown, your notes, and a link back to the page — or the exact second of the video.
- Anki & your data
- Send cards to Anki through AnkiConnect (its own note type, duplicates skipped), or export a file. Full JSON backup and restore. Nothing leaves your computer.
- Progress you can read
- Coverage of each frequency band, known words over time, a review heatmap, retention by week, and a two-week forecast.
- Grammar patterns
- Over 100 particles, endings, and multi-part patterns (‑고 싶다, ‑(으)ㄹ 수 있다, ‑(으)ㄴ 적이 있다…) recognized and explained in plain English.
Teaching Korean?
Jupjup is free for your students to use with any video or article you assign. We're building tools for classes — shared sentence sets and a simple view of what your students are learning. Tell us what would help, and we'll let you know first.
No AI
Real Korean from real people, and dictionaries written by humans. Nothing made up.
Yours alone
No account, no tracking. Your words and cards stay in your browser.
Fast & free
It runs right on your computer, so it's quick — even offline.
Questions
What level do I need to be?
It's most useful once you can read Hangul and know a few hundred common words. Beginners can still rest the mouse on any word to look it up.
Which sites does it work on?
Lookups work on any page with Korean text. Clickable subtitles work on YouTube, Netflix, Disney+, Prime Video, Max, and most video players — just turn on Korean subtitles.
How does it know which words I know?
You pick a rough starting point when you install it (like "the 1,000 most common words"), then click Know on words as you meet them. Words you've reviewed for a few weeks count as known automatically.
Does it work with Anki?
Yes. Send your saved cards to Anki in one click with the free AnkiConnect add-on, or download a file to import.
Does it work on my phone?
Not yet — it's for desktop Chrome, Edge, Brave, and Arc. Phone reviews are coming; leave your email and we'll let you know.
Is there a Mac app?
Not yet. We're thinking about one that works outside the browser too, in KakaoTalk, PDFs, and video apps. Want it? Leave your email.
Is it free? What happens to my data?
Free, with no account. Your words and cards stay in your browser, and nothing is uploaded unless you choose to share anonymous counts. Privacy details
What does "줍줍" mean?
Korean slang for picking things up — little finds and freebies. Here, it's the words you pick up along the way.
Start picking up Korean today.
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