YOUTUBE · TRANSLATE & LISTEN
Translate YouTube. Listen in English.
Follow a Japanese video in English. Turn on translated subtitles, then hear the translation while the video keeps playing.
See how it worksWaiting time shortened
Browser extension preview · Requires readable video captions
From watching to understanding.
01
Start with the original
Open a supported YouTube video with captions. Keep the video and its context in view.
02
Turn on translation
Choose English and switch on Translate subtitles. Follow the translated words alongside the video.
03
Turn on narration
Switch on Read translation to hear the English text. Control translation and narration separately.
Before you press play
Does it work without captions?
This preview translates captions CastReader can read from the video. It does not transcribe videos without captions, and it is not for live streams.
Is this the creator’s own dubbed audio?
No. CastReader reads the translated captions with a synthetic voice. It does not clone the speaker’s voice or lip-sync the video.
Can I use subtitles without narration?
Yes. Translate subtitles and Read translation have separate switches. You can follow the translated text before deciding to listen.
I can see English captions. Why is there no narration?
Caption translation does not start reading automatically. Turn on Read translation and keep the video playing through a captioned section. When watching the recording on this page, use its separate sound button.
Find the right next step
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