Compare software

Language ReactorMirumoji
Freemium

Free to use, with additional features in a paid tier.

 Free

Free and open source under the MIT licence.

Browser extension Web, Self-hosted
  • Dual subtitles on Netflix and YouTube
  • Uses real native material instead of textbook content
  • Clickable word lookups in subtitles
  • Whisper-based subtitle generation
  • Depends on third-party streaming sites that can change their players
  • Proprietary
  • Only for learning Japanese
  • Requires Docker setup
Browser extension Self-hosted
Closed source Open source
License not stated License: MIT
Not stated if an account is needed Not stated if an account is needed
Needs internet Not stated if it works offline

Checked September 23, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.