Free wallpaper resizer for any phone

The same size as your screen in pixels, for example 1080 by 2400 on many Android phones. Open this page on your phone and tap This phone to use its exact size. A wallpaper that matches the screen is not zoomed or cropped by the launcher.

Some launchers zoom a wallpaper so it can move as you swipe between home screens, and pictures with a different shape than your screen get cropped. Resizing to the exact screen shape fixes the crop. Turning off wallpaper scrolling in your launcher fixes the zoom.

Not if you start with a big enough picture. The tool scales with high-quality smoothing and saves a high-quality JPEG. Very small pictures will look soft when stretched to a full phone screen.

Museums publish public-domain paintings you can use freely. Tessera sets a new museum painting as your wallpaper every day, already sized for your screen.