天上天下、唯我独尊。
Tenjō tenge, yuiga dokuson.
Throughout heaven and earth, I alone am the honored one.
How it works
Your watch session is the study session
DoubleTake is a desktop Chrome extension for learning Japanese through anime and video. It adds Japanese and English subtitles, timing alignment, word lookup, and Anki capture while you watch.
Press play
Start an episode on Netflix or Crunchyroll and watch the way you already do.
Read along, live
Dual Japanese and English subtitles render over the player, with alignment tools for timing differences.
Look up a word
Click a word in the subtitle or transcript to see its reading and meaning.
Save it as a flashcard
Keep a word or the whole line — with its sentence, reading, and timestamp — in one click.
Export to Anki
Send your saved cards to Anki and review them on your own schedule.
Where it works
First-class support for Netflix, Crunchyroll, and Prime Video
Support for many sites with a standard HTML5 video player is experimental. Compatibility varies by site.
The feature set
Watch.Understand.Remember.
Eleven features, sorted by the moment in an episode you actually reach for them.
Explore the featuresWatch
視聴4getting the right lines on screen, in time
- Dual subtitles + Romaji — three styled overlay slots
- Three subtitle sources — native, fetched, or your file
- Subtitle alignment — drift fixed line by line
- Subtitle appearance — size, color, spacing, position
Understand
理解5breaking a line down without losing the scene
- Instant word definitions — reading, meaning, JLPT, frequency
- Kanji stroke order — play, step, and replay any character
- Live transcript search — find a line, jump to it
- Playback automation — pause, loop, condense, skip gaps
- Transcript row styles — Card, Spotlight, Cinema
Remember
記憶2keeping what's worth keeping
- Save vocabulary — with sentence, reading, episode, timestamp
- Create vocabulary cards — build the card, export to Anki
Every feature listed here runs live on the features page — inside the real interface, not a screenshot.
FAQ
Questions about DoubleTake
DoubleTake has first-class support for Netflix, Crunchyroll, and Prime Video. Support for many sites that use a standard HTML5 video player is experimental.
DoubleTake currently requires Google Chrome on a desktop or laptop.
DoubleTake includes a 7-day free trial. Continued access afterward requires a paid subscription.
No. DoubleTake can use the show's Japanese subtitle track, search for another subtitle file, or let you add your own SRT file.
DoubleTake includes automatic subtitle alignment for offsets and drift. Alignment can still fail for some titles or subtitle releases, and timing controls remain available.
DoubleTake is for people learning Japanese through anime and video. You can show or hide Japanese, romaji, and English lines as your listening improves.
No. Saved words stay in DoubleTake with the sentence, reading, and timestamp. You can export them to Anki when you want.
No. DoubleTake adds subtitles inside your browser. It does not change the video stream, download the video, or control your account.
Your settings, cached subtitles, and saved study data stay in your browser. The extension sends only limited, content-free events for the rating and feedback prompt; it does not send subtitles, transcripts, saved study data, or viewing activity for analytics. Account and subscription checks use DoubleTake services, while optional subtitle and dictionary features contact their providers. The website uses limited analytics. See the Privacy Policy for details.
Your next episode can teach you Japanese.
Launching in Sept. 2026. Join the waitlist and we'll let you know when it's ready.