bilibili
Smart Track Detection
Automatically enables the ai-zh / ai-cn / zh-CN subtitle track. If a video has no Chinese track, it falls back to the ai-en track so translation still works.
04 · browser extension
bilisub translator
real-time dual subtitles for bilibili
browser extension · translation
- artist
- fazza abiyyu
- date
- 2026
- role
- extension development
- medium
- JavaScript · Extension APIs · Google Translate
- status
- on view
- firefox add-on
- addons.mozilla.org ↗
- edge add-on
- microsoftedge.microsoft.com ↗
statement
A browser extension that adds real-time multi-language subtitles to Bilibili videos — fire-and-forget translation that just works, across Chrome, Edge, and Firefox, with 100+ target languages.
- mechanism auto-detects the ai-zh / ai-cn subtitle track; falls back to ai-en when absent.
- display dual subtitles rendered in the player, original and translation side by side.
- lineage built on the bilibili-double-subtitle architecture, tuned with immersive-translation concepts.
100+ languages
3 browsers
2 platforms
MIT license
the problem
great videos, locked behind one language
Bilibili hosts a universe of content that non-Chinese viewers never reach. Native AI subtitle tracks exist, but only in Chinese or English — everyone else watches blind.
the answer
translation that disappears
BiliSub detects the available AI subtitle track (falling back gracefully), translates it in real time to any of 100+ languages, and renders dual subtitles inside the player — no copy-paste, no second screen, no friction.
exhibited artifact
notable installations
features & integrations
in-player ui
Dual Subtitle Display
Original and translated lines render together in the player — readable, positioned, and out of the way of the content.
zero-lag tuning
Fire-and-Forget Translation
High-precision realtime translation concepts adapted from Immersive Translate, tuned for a smooth Bilibili watching experience.