Subtitle Shield

Hide, blur, or flip YouTube and Bilibili captions so language learners listen first.

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Author

phj233

Daily installs

Total installs

Ratings

0 0 0

Version

0.2.0

Created

2026-06-12

Updated

2026-06-16

Size

44.7 KB

License

MIT

Applies to

Subtitle Shield

Subtitle Shield is a caption helper for language learners on YouTube and Bilibili. It adds a small, reversible layer of friction to captions so you can listen first and reveal text only when you need it.

Features

Supports YouTube and Bilibili.
Global enable/disable plus per-site toggles.
Caption modes: blur, flip with blur, hide, pause-only, and delayed reveal.
Configurable blur strength, delay time, and Bilibili caption position offset.
Hold a shortcut key to temporarily reveal captions.
Optional hover-to-reveal behavior.
In-page settings panel with drag, close, and minimize-to-floating-ball support.
Chinese and English UI.

Usage

After installing the script, open a YouTube or Bilibili video page and choose "Open settings panel" from your userscript manager menu. The panel lets you adjust caption mode, shortcut behavior, site toggles, and position offset.

Source code:

https://github.com/phj233/subtitle-shield