A free tool for app and website developers to get live viewport dimensions of any device.
Free • Proprietary
What is Viewport Sizer?
Viewport Sizer is a free tool for measuring viewport dimensions across any device. Simply visit the website to view your current viewport size. We've also compiled a list of all known modern devices, phones & tablets with all screen size specifications. It's the perfect tool for app and website designers looking to fine-tune their designs for specific screen sizes.