Granted once per browser to verify the subtitle and explanation experience.
Subi for YouTube
AI bilingual subtitles for YouTube.
Click any word, phrase, or sentence to understand it in context.
in context
The meaning is explained from this sentence and scene, not copied from a generic dictionary entry.
Once you see it in context, it makes sense.放到语境里，你就能理解了。
Stays with the video
Read original and translated subtitles without copying links or switching tabs.
Explain what you click
Open a word, phrase, or full sentence in the context of the current scene.
Charges for completed work
Credits are calculated after successful generation. Failed requests do not consume credits.
One subtitle. Three levels of understanding.
Read both languages, inspect the difficult part, then understand what the whole sentence means here.
Keep watching while you learn.
The subtitle list, contextual explanations, and subtitle export stay beside the player.
Bilingual subtitles
Keep the original structure visible while reading the translation.
Words and phrases
See the current meaning, tone, and common expression without leaving YouTube.
Whole-sentence context
Understand idioms, sarcasm, and cultural references in the scene.
Open YouTube and start watching.
Subi is a browser extension, so the learning workflow stays on the original video page.
Install
Load the current Chrome extension build once.
About two minutesOpen a video
Subi reads available captions and prepares the selected language direction.
No uploadWatch and inspect
Captions generate in segments, and matching cached work is reused.
Inside YouTubeCredits follow the content generated.
A long video may contain very little dialogue. Subi charges after successful work instead of using video duration alone.
Open a video0 credits
Failed generation0 credits
Completed subtitlesActual usage
Context explanationActual request
Try it first. Upgrade when you need more.
An anonymous browser gets one trial allowance. A free Google account receives credits each calendar month.
Granted each calendar month after Google sign-in. Standard translation quality only.
Viewing-hour estimates use a medium dialogue density. Actual usage depends on caption length, quality, and explanations.
What to know before you start.
Why does Subi use Google sign-in?
Sign-in keeps credits, plans, and checkout results in sync. Subi does not ask you to create another password.
Will a refresh sign me out?
No. The session normally lasts 30 days unless you sign out, it expires, or browser site data is cleared.
Does opening a video consume credits?
No. Credits are calculated only after subtitles or explanations are generated successfully.
Does Subi reuse previous translations?
Yes, when the video, caption source, target language, and quality level match an existing cached result.
Can I cancel a subscription?
Yes. Until the Creem customer portal is connected, email [email protected] for subscription management.