Polypane is a browser built from the ground up to create websites and apps. Polypane is the only browser that lets you develop a website for all viewports and devices at once, and gives you the best overview of them.
View your site at all sizes
Stop resizing your browser. Use Polypane to see the full range of viewports for your site in a single overview. Choose from popular device sizes, your css breakpoints or resize panes manually. More Info »
All your actions are synced
Interact with one pane and all other panes will automatically follow your actions. Scrolling, clicks and hovers are automatically shared between panes. Easily verify that your site works as intended on all viewports.
With a single click you can generate a screenshot with a full overview of your site at all screen sizes and share it with anyone.
Layout debugging, CSS stress-testing & Chromium-based devtools. Polypane has all the tools you need to create modern websites and apps.