Window Resizer

Resize your browser window to common device and screen sizes in one click.

Window Resizer sets your browser window to an exact pixel size, instantly. Open the popup, click a preset, and the current window snaps to that size, centered on your screen. Type your own width and height into the custom field for anything not in the list; the last size you entered is remembered for next time. Built for people who check how a site looks at a specific resolution: front-end developers, designers, QA, anyone taking clean screenshots. WHAT'S IN THE POPUP • Quick actions — Maximize, Center, Left half, Right half • Laptop and desktop presets, from HD up to 4K • Tablet presets in portrait and landscape • Phone presets covering small, standard and large handset widths • Custom size — enter any width × height, saved for next time • A live readout of the window's current size, with the matching preset highlighted DETAILS • Sizes are capped to your screen's work area, so a preset larger than your monitor still fits on screen instead of running off the edge • Multi-monitor aware — resizes the window on whichever display it's on • Only the browser window is resized; the page content is not scaled or zoomed PRIVACY Window Resizer has no server and no analytics. The only thing it stores is the last custom width and height you typed, kept locally in your browser so the fields are pre-filled next time. Nothing is ever transmitted anywhere. Open source. Not affiliated with Apple, Google, Microsoft or Samsung; device names are used only to label common screen resolutions.