What is my browser window width?
This browser window is
wide, including the scrollbar.
If you resize the window, refresh the page to see the new width.
I added this tool to help with my CRO browser testing. When setting up an A/B test, it's essential the new variations look and function as required on all devices.
If they don't, you'll have to amend your CSS code for different @media breakpoints.
Knowing the pixel width of your current browser window makes this job much easier.
This works great on tools like CrossBrowserTesting.com.
TIP: While we're on the subject of @media breakpoints. In Google Analytics, record the breakpoint a user is viewing. It's much more insightful and relevant to you than the Device Category. You can learn more about it in this handy blog post I wrote.