Dual Subtitles: Subtitle Translator, SRT Download by Tanglement

Dual Subtitles shows two subtitle lines at once, the original and your language, on Netflix, YouTube, Prime Video, Disney+, Max, Crunchyroll and TED. Free with no account: unlimited dual subtitles whenever the site has both languages, plus 30 translated minutes a day.

Built for language learning: click a word for its meaning, save it with its sentence, and review it in Anki.

• Uses the site's own subtitles in your language when they exist (YouTube auto-translate, Netflix's other tracks), so the second line is free and unlimited
• Otherwise translates the line into 52 languages, Japanese, Chinese, Korean and Turkish included. Works without an API key, or connect DeepL, Google Cloud, LibreTranslate or your own local LLM (Ollama, LM Studio)
• Click any word: the video pauses and you get its translation and dictionary definitions. Save words with their sentence and export them to Anki
• Style each line separately: size, colour, background, opacity, weight, top or bottom
• A and B buttons on the video show or hide either line at any time
• Download subtitles as SRT or VTT where the licence allows it: TED talks and Wikimedia Commons, plus a built-in player that turns your own subtitle file into a bilingual SRT/VTT
• No account and no sign-in. Subtitles are read from what your player already loaded

Free: unlimited dual subtitles whenever the site has both languages, 30 translated minutes a day, 20 word look-ups a day, 50 saved words, all styling, all permitted downloads.
Pro: unlimited translated minutes, unlimited look-ups and saved words, Anki/CSV export of your words. €2.49 a month, €19.99 a year, or €29 once.

Streaming services forbid downloading their subtitles in their terms, so on those sites Dual Subtitles displays them and never saves files.

Dual Subtitles is not affiliated with Netflix, YouTube, Amazon, Disney, Warner Bros. Discovery, Crunchyroll or TED. Their names only describe where it works.