Stop resizing your browser
Use Polypane to see the full range of viewports for your site in a single overview. Resizing is as simple as dragging. See all viewports at once.
Detect breakpoints. Automatically
Create panes from all the breakpoints in your CSS with Polypane's breakpoint detection. One click gives you a full overview of your CSS breakpoints.
Or use popular devices
With a list of popular device sizes, checking to see if your site or app renders well on user devices becomes easy and fast.
Sync all your actions
Scrolling, clicks, navigation and hovers are automatically synced between all panes. Easily verify that your site works as intended on all viewports.
Generate a full overview screenshot with a single click. See your your site at all screen sizes and share it with anyone.
Use focus mode to work on a website with a single view center stage. Quickly resize the pane to try out different sizes or zoom out to show a 4K screen on your laptop.
With the quick switcher you can quickly change between CSS breakpoints or your selected panes.
Powerful developer tools
Polypane has your back when it comes to debugging your website, with powerful and modern devtools and your favorite Devtools extensions like the React or Vue.js Devtools.
Trying to fix a difficult layout bug? Toggle Layout debugging on and quickly find the element causing the issue.
Zoom your browser
Sometimes you just need to fit a 4K screen and an iPhone side by side. Zoom individual panes, or your entire browser, to get the view you need.
And much more
- Store your favorite pane sets in Workspaces
- Customizable device presets
- Layout stress-testing with random pane sizes
- Tons of keyboard shortcuts
- Reorder, resize and zoom individual panes
- Size panes in pixels, or in EMs
- Perfect with hot reloading tools
- Monthly updates