Mobile Viewport Switcher

by knocker · Tools

Manifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

Apply a shared responsive viewport to user-selected websites

Users

−2 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#322K

#255K among extensions

Version

1.0.0

updated 1 Sep 2026

Users

monthly, 1 months

Latest, 16 Oct 2026: 3 usersMove the mouse over the chart for any month

Ratings count

monthly, 1 months

Latest, 16 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Mobile Viewport Switcher

登録したWebサイトを、指定したスマートフォン幅のviewportで表示するChrome拡張機能です。サイトごとに適用・無効を設定でき、縦画面・横画面それぞれのviewport幅を指定できます。 Chrome Debugger APIを使用してブラウザのviewportサイズを変更します。User-Agentやページ内容は変更・収集せず、外部サーバーへの通信も行いません。