Check and Change Screen Size

by app-comcent-develop · comcent.co.jp · Tools

Established publisherManifest V3 Free

View in Chrome Web Store Data as of 21 Oct 2026

With this extension, you can easily check and change your screen and window sizes. You can save your settings as presets.

Users

+1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#147K

#123K among extensions

Version

0.1.4

updated 7 Sep 2026

Users

monthly, 4 months

Latest, 21 Oct 2026: 23 usersMove the mouse over the chart for any month

Ratings count

monthly, 4 months

Latest, 21 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 Check and Change Screen Size

It helps you quickly adjust and verify viewport sizes for responsive checks, QA workflows, and screenshot preparation. Key features: Always-on window size display on all websites One-click copy of width x height to clipboard Preset list with width, height, X, and Y position Edit mode to add, update, and delete presets Quick apply row for temporary size/position changes (without saving) Toggle visibility from the extension icon (with badge indicator when hidden) Supports both Japanese and English UI Great for: Front-end developers testing breakpoints QA teams validating fixed viewport scenarios Anyone needing fast, repeatable window size control