Best Browser Extensions for Learning Korean With Viki (2026)

For Korean-specific study on Viki, start with Kimchi Reader. Choose Migaku if you want the strongest built-in capture-and-review loop, Sabi if passive watching is your problem, or VinnerVi if you mainly want a simpler bilingual subtitle overlay.

If a “best language-learning extension” list recommends a tool without first proving it supports Viki, the list has already failed the easiest test. This comparison only ranks tools whose current first-party material explicitly names Viki: Kimchi Reader, Migaku, Sabi, and VinnerVi. Then comes the harder question: which one actually helps you learn Korean instead of merely translating the next line?

Quick picks: which Viki extension fits your Korean study?

One current-status note before we go further: Viki’s own Learn Mode was removed effective July 31, 2023. If an old tutorial tells you to switch it on, you have found archaeological instructions, not a hidden setting.

How I ranked them: what survives the scene?

A Viki extension can make subtitles more convenient and still leave your Korean almost untouched. The better test is what remains after the useful line disappears from the screen.

This Watch → Notice → Capture → Review model is an editorial decision framework, not a published learning-outcome benchmark. The product features below are current vendor-documented capabilities; I am not pretending anyone ran a controlled study proving that Extension A produces 17% more Korean per episode. That would be very impressive spreadsheet cosplay.

1. Kimchi Reader: best for serious Korean-specific Viki study

Kimchi Reader is the strongest match when the hard part is not “What does this subtitle mean in English?” but “What is this Korean form actually doing?” Its current Chrome Web Store listing explicitly names Viki and describes Korean-specific lookup with definitions, grammar breakdowns, hanja origins, idioms, frequency rank, Korean and English dictionary information, dual Korean-English subtitles, vocabulary states, and sentence mining. Its web-extension manual also explicitly names Viki.

That Korean-first focus matters. Suppose you see 진짜?. A translation can give you “Really?” and technically finish its job. A learner still needs another question: Really? said to whom? Bare 진짜? is casual. If you blindly recycle it with a professor when your intention is respectful surprise, you have learned the English gloss but not the Korean choice.

Choose Kimchi Reader if: you already know some Hangul/basic Korean and your biggest leak is morphological, grammatical, or lexical detail disappearing while the drama keeps moving.

Skip to Migaku if: you care less about Korean-specific linguistic depth and more about getting captured material into a self-contained review loop with minimal assembly.

As of August 22, 2026, its store listing describes a paid subscription with a seven-day free trial and no card required. Treat pricing and trial terms as time-sensitive.

2. Migaku: best all-in-one capture and built-in review loop

Migaku explicitly lists Rakuten Viki among its supported streaming sites and includes Korean among its languages. Its current extension materials describe interactive subtitles, dictionary and contextual explanations, frequency information, learning statuses, line/subtitle browsing and replay, and one-click media-rich flashcards that can preserve a sentence with native audio, screenshot, and audio context. Migaku also has its own spaced-review system, with Anki export as an option rather than the only destination.

That gives Migaku a very strong answer to what survives the scene? The useful line does not have to become a handwritten note called “cool phrase from episode 6 maybe around minute 31.” It can become a reviewable item with the media context attached.

Choose Migaku if: you keep noticing good Korean but never review it, or you dislike stitching together separate lookup, capture, screenshot, and SRS tools.

Choose Kimchi Reader instead if: your priority is Korean-specific analysis—especially the language details that sit between “dictionary meaning” and “I can reuse this naturally.”

Its current store material advertises a ten-day no-card trial. Again, that is a current access detail, not a permanent promise.

3. Sabi: best if watching keeps turning passive

Sabi currently names Rakuten Viki and Korean and describes dual subtitles, Whisper-generated subtitles, word translation with grammar/examples, vocabulary lists, spaced-review flashcards, auto-pause/customization, and in-video fill-in-the-blank and multiple-choice activities.

Its interesting advantage is not “more subtitle stuff.” It changes the learner’s job. If your normal Viki routine is:

• see Korean;
• think “yeah, I know that”;
• watch another 43 minutes;
• discover tomorrow that apparently your brain filed nothing;

then retrieval prompts can be more useful than another dictionary panel.

Choose Sabi if: passive familiarity is your main enemy and you want the video experience to ask something back from you.

Important limitation: AI/Whisper-generated Korean text is not automatically an authoritative transcript. If you are going to copy a Korean sentence into a production deck, imitate its register, or memorize an exact ending, verify the wording against a trustworthy Korean-text source first.

As of August 22, 2026, Sabi’s current store listing advertises a seven-day trial with no card. Treat that as changeable.

4. VinnerVi: best if you mainly want bilingual meaning support

VinnerVi is the deliberately simpler choice. Its current first-party site explicitly lists Viki in Streaming Mode and says it reads the show’s own subtitles, translates them live, and displays the original and selected language side by side.

If your actual problem is “I lose the plot when I remove English,” this can be exactly enough. A second language line can keep you inside the scene without forcing you into a vocabulary database, grammar analyzer, or flashcard routine you did not ask for.

Choose VinnerVi if: bilingual comprehension is the immediate goal.

Choose one of the first three instead if: you want Korean-specific form analysis, durable capture, or scheduled review. A second English line can rescue the plot without rescuing the Korean.

The vendor currently describes a no-card trial and roughly one streaming credit per minute. Those access details can change.

Korean depth check: translation is not register

Here is a small way to see why the comparison matters. These are controlled teaching examples, not quotes from a Viki drama and not claimed outputs from any extension.

The point is not that one extension is guaranteed to produce every explanation above. The point is that English meaning alone is not enough to tell you whether a Korean line is safe to reuse. A Korean-first analysis tool earns its keep when it helps you notice the form, relationship, and word choice you would otherwise flatten into one translation.

Try the Korean yourself before opening the models

Produce three short answers. Do not reveal the models until you have committed to your own version.

• A close friend says something surprising. Say a casual “Really?”
• A professor says something surprising. Say a polite “Really?”
• Say “I made a promise” naturally in Korean.

Why Language Reactor is not in this Viki ranking

Language Reactor is well known for video language learning, but fame is not Viki compatibility evidence. Its current official Getting Started page describes its browser-extension video tools for Netflix and YouTube. Current first-party research for this article did not verify Rakuten Viki support.

So I am not ranking it here. That is an evidence boundary, not a claim that Language Reactor can never work with Viki under any circumstance. If its official support changes, the comparison should change too.

Which Viki extension should you test first?

Pick the sentence that sounds most like your current problem.

Give the winner one Viki scene before you subscribe

Do not marry the extension after reading its Chrome Store vows. Give it one scene.

No fake score needed. If your problem is review and the saved line never reaches a usable review queue, the extension failed your important test even if it has 47 other buttons. If your problem is Korean register and the tool only gives you English translation, same story.

If Viki is not your only study environment

Once you have the Viki-specific tool sorted, you may also want a consistent video-study workflow elsewhere. You can explore FunFluen for video study on supported video pages.

This is not a claim that FunFluen works on Viki. For the exact Viki workflow in this article, stick to the four options above whose current vendors explicitly document Viki support.

If you want the broader learning method behind these choices—not just one extension—see media-based language learning.

FAQ

Stop collecting extensions. Collect usable Korean.

The best Viki language-learning extension is not the one with the longest feature page. It is the one that fixes the stage where your Korean currently disappears.

Need Korean-specific analysis? Start with Kimchi Reader. Need the line to become a review item? Migaku. Need watching to push back and make you retrieve? Sabi. Need a cleaner bilingual bridge so you can keep following the scene? VinnerVi.

Compatibility gets a tool into the shortlist. What survives the scene decides whether it stays in your browser.

Sources

• Rakuten Viki Help: Sunsetting of Learn Mode Feature
• Chrome Web Store: Kimchi Reader
• Kimchi Reader Manual: Web Extension
• Chrome Web Store: Migaku
• Chrome Web Store: Sabi
• VinnerVi Subtitles
• Language Reactor: Get Started