Learn Japanese on YouTube & Bilibili
The Langly Chrome extension adds interactive subtitles, a one-tap dictionary, and automatic progress tracking right on YouTube and Bilibili — plus a free library of Japanese videos graded into five difficulty levels.
Get the Chrome extension🇯🇵 Select a difficulty level
How it works
- Pick a video at your level. Filter the library by level and topic — news, daily life, culture, gaming and more.
- Watch with interactive subtitles. The Langly Chrome extension takes over right on the video page — tap any sentence for a breakdown with readings and translations; any word opens a learner's dictionary written for Japanese learners.
- Watch your hours add up. Langly counts every minute of input automatically and shows your progress along the level roadmap on the study report.
Features
- Chrome extensionLangly lives where you already watch — the extension adds subtitles and the dictionary right on YouTube.
- Interactive subtitlesReplay a line, or step to the previous or next one, with a single tap or arrow key.
- One-tap dictionaryTap any word for a learner-friendly definition, paired with clips of it spoken in real videos.
- Five difficulty levelsVideos are graded from Super beginner to Advanced by measuring the words they actually use.
- Visual reportSee how much you've learnt at a glance, and how many hours are left to reach the next level.
- Saved words & Anki exportSave words as you watch and export them to Anki whenever you want.
FAQ
Is Langly free?
Yes — browsing the library, watching with interactive subtitles, the learner's dictionary and the study report are free.
How do I watch the videos?
On YouTube itself. The Langly Chrome extension is the heart of the experience: it adds interactive subtitles, the one-tap dictionary and automatic time tracking to the videos you watch, so you learn on the sites you already use.
What is comprehensible input?
Learning by watching and reading things you can mostly understand. You pick material slightly below your ceiling, watch a lot of it, and the language sticks — the method behind Dreaming Spanish, applied to Chinese.
I'm a complete beginner. Where do I start?
Start with Super beginner videos — slow, visual Chinese that assumes almost nothing. Watch daily, and move up a level when the current one feels easy.
How are videos graded into levels?
Langly measures every video's vocabulary against its whole Chinese corpus and assigns one of five levels, from Super beginner to Advanced — so the level reflects the actual words used, not a guess.
How many hours of input do I need?
As a rough roadmap: about 50 hours to clear Super beginner, 150 total for Beginner, 300 for Low intermediate, 600 for High intermediate, and 1200 to reach Advanced. Langly tracks your hours automatically as you watch.
Start watching today
The library is free — pick a video, and let the Chrome extension turn it into a lesson with interactive subtitles.