Chrome Extension Japanese Learning Free for N5

Immerse Japanese

Learn Japanese while you browse.

Words on any webpage swap to Japanese. Hover to reveal the kanji, kana, and romaji. No separate study sessions, no flashcard apps — just language immersion woven into what you're already doing online.

Add to Chrome — Free View pricing →

What is Immerse Japanese?

Immerse Japanese is a Chrome extension built around one idea: the most effective way to learn a language is to be surrounded by it. Rather than isolating study into a separate app or session, it brings Japanese directly into your existing browsing — replacing words on the pages you already read.

Hover over any swapped word to see its full entry: kanji form, kana reading, and romaji. On YouTube, subtitles are replaced the same way. The extension draws from a JMDict-based vocabulary set, filtered by JLPT level so you're always seeing vocabulary appropriate to where you are in your learning.

Features

Passive Word Replacement A configurable percentage of words on any webpage are swapped to their Japanese equivalents automatically — subtle enough to read through, strong enough to learn from.
Hover Reveal Hover any swapped word to see the kanji, kana reading, romaji, and English meaning in a clean tooltip overlay.
YouTube Subtitle Support On YouTube, video subtitles are processed the same way — words replaced inline so you can learn while watching.
JLPT Level Targeting Free for N5 (basic vocabulary). Unlock N4 through N1 with a one-time upgrade — so the vocabulary you see always matches your current level. Paid
Replacement Density Control Adjust what percentage of words get replaced — from a gentle introduction to full immersion. Paid
No Account Required Everything runs locally in your browser. No login, no data collection, no subscription dashboard.

JLPT Levels Explained

The Japanese Language Proficiency Test (JLPT) has five levels. N5 is the entry point — around 800 common words. N1 represents near-native reading ability. Immerse Japanese is free at N5, giving absolute beginners a no-risk way to start. Unlocking higher levels adds vocabulary from N4 through N1 progressively, so intermediate and advanced learners always see relevant words.

Pricing

Immerse Japanese is free to use at N5 level — no time limit, no credit card. Unlock all levels with a one-time payment.

Free — N5

$0

No account required · always free

  • N5 vocabulary (~800 words)
  • Word replacement on all pages
  • Hover reveal: kanji, kana, romaji
  • YouTube subtitle support

Full Access — N4 to N1

$4.99

One-time · yours forever

  • All JLPT levels: N5 through N1
  • Expanded vocabulary for intermediate & advanced learners
  • Replacement density control
  • All future vocabulary updates included

Payment & Delivery

Payments are processed securely by Stripe. Full Access is a one-time purchase — there are no recurring charges. Access is activated immediately as digital access to the Chrome extension. No physical goods are shipped.

See our Refund Policy for details.

System Requirements

  • Google Chrome (latest version recommended)
  • Works offline — vocabulary data is bundled locally
  • Windows, macOS, Linux, or ChromeOS