What is 4Subtitles?
An upcoming language-learning tool: interactive, real-time subtitles with instant word-by-word understanding for films, series, YouTube and books — in the language you’re learning. A Language Reactor alternative.
Does it work with Netflix and YouTube?
It’s built for the content you already watch — streaming, YouTube, and your own files.
What if a video has no subtitles?
Whisper-class AI speech recognition generates accurate subtitles in real time — interactive learning works even where subtitles don’t exist.
Is my data private?
Privacy by design: no ads, no tracking, your data stays yours.
Is this legal in Germany?
Yes. Germany’s private-copy right — Privatkopie, §53 UrhG — covers copies you make for your own personal use, like learning a language from what you already watch.
When can I try it?
Join the waitlist — one email the moment it’s ready. Beta testers get it free, for life, on release.