CRX id
pjcalmbgdeghknpdicbhmfnfmpmfajpi
pjcalmbgdeghknpdicbhmfnfmpmfajpi
Description from extension meta
A tool to place resizable, copyable, and deletable black boxes on any page for privacy when screen sharing.
Image from store
Description from store
draggable black rectangle lets you instantly mask any on-page content with a solid black box—no fiddly blur tools or incognito tabs required. Click the toolbar icon or hit Ctrl+Shift+Y (Windows/Linux) / ⌘+Shift+Y (macOS) to place a resizable, draggable overlay exactly where you need it. Need multiple masks? Just hit the copy button to clone an existing box. When you’re done, click the ✖ button to remove it.
Designed for seamless screen sharing, this extension ensures your passwords, private notes, or sensitive data stay hidden—even as you navigate or reload pages. Masks persist across navigation so you can focus on your call or presentation without interruption. No setup or configuration—install, click, and share with confidence.
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draggable black rectangle を使えば、面倒なぼかしツールやシークレットタブを開くことなく、ページ上の任意のコンテンツを黒いボックスで瞬時に隠せます。ツールバーアイコンをクリックするか、Ctrl+Shift+Y（Windows/Linux）または ⌘+Shift+Y（macOS）で、必要な場所にドラッグ＆リサイズ可能なオーバーレイを配置。複数箇所を隠したいときはコピー📄ボタンを押すだけで複製、終了時は✖ボタンで削除できます。
画面共有に特化した設計により、パスワードやプライベートノート、機密データをナビゲーション中やリロード中でもしっかり隠し続けます。マスクはページ移動後も持続するので、プレゼンやビデオ通話に集中でき、面倒な設定は一切不要です。安心してすぐにインストール＆利用を開始できます。
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[Version 0.2] Adopted Shadow DOM for the rectangle component to isolate it from page styles, ensuring a consistent design and control layout on any website.
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github:
https://github.com/yto/draggable-black-rectangle
developer:
yto （タツヲ）
https://x.com/yto
Latest reviews
- (2025-09-03) cridus rossi: I've reviewed the code of version 0.2 and I can confirm it doesn't do anything fishy at all. It only cares about its rectangles. Works as advertised. I'm glad this exists because another very similar extension was abandoned and doesn't work anymore now. The only thing I miss from that one, is being able to create a rectangle by right-clicking on the page and choosing a context-menu entry added by the extension itself. P.S. it would be nice to be able to resize the rectangle by dragging on any corner and not just the bottom-right one.