Resize your document to test responsive layouts.
easy way to resize any website to test responsive layouts using a list of most popular cellphones and their viewport.
Window and Viewport Precise Resizer(精确调整窗口或可视窗口大小)
Responsive design testing tool to test any website’s responsiveness – it only takes 2 seconds! Emulate various screen resolutions.
This extension displays Chrome’s viewport dimensions when resizing the browser window.
Viewport detector for bootstrap 3
Overlay current page in Google Resizer tool (https://material.io/resizer/). HTTPS only.
This extension displays Chrome’s viewport dimensions when resizing the browser window.
Take a screenshot of the current tab viewport and glitch it. Iteration of 'Page Glitcher' by zky829
Simple extension for the new Google Resizer.
Darkens portions of the screen to aid focus
Chrome window resizer