Google has just released a nifty Design Resizer to help quickly test your website in various mobile sizes to help check for responsive issues. It’s similar to the excellent viewport resizer Chrome extension that we’ve used for a while, but it doesn’t require any kind of browser extension.
To make it even better, we’ve created a simple bookmarklet for you to use so you can click a link on any website and instantly view it in the Resizer tool without having to type anything. Take the bookmarklet here and simply drag it up to your bookmarks bar –> Resize
If you’re not sure what a “bookmarklet” is, or how this tool might be useful, check out the short video below: