Key features
- preset window sizes for common device widths
- custom size creation with adjustable width and height
- one-click resize applied to the current window
- add and delete function for managing your own size list
- rotate option to flip between vertical and horizontal orientation
- works across any standard website
What Window Resizer does
Window Resizer is a one-click utility that resizes your current browser window to a preset or custom size, useful for previewing how a page looks at mobile, tablet, or desktop widths. It's aimed at web developers and designers who need to check responsive layouts without manually dragging window edges each time.
Custom sizes and rotation
Beyond the built-in presets, you can add your own custom sizes by setting a specific width and height, then delete them later if you no longer need them. A rotation option lets you flip the current size between vertical and horizontal orientation, which is handy for checking how a layout adapts to portrait versus landscape.
Where Window Resizer doesn't work
The extension resizes the browser window itself, so it works on regular websites but not on Chrome's internal pages, a blank new tab, or the Chrome Web Store gallery. If a resize doesn't seem to apply, check that you're on a standard webpage rather than one of these restricted page types.