The Android QHD Wallpaper size (1440×2560px)
1440x2560 pixels at 9:16 is the classic Quad HD (QHD) phone resolution, used by many higher-end Android flagships of the 16:9 era and still a solid high-resolution baseline. With substantially more pixels than Full HD, a wallpaper at this size stays crisp on dense phone panels, showing fine detail and smooth gradients that a 1080-wide file cannot quite match.
The standard 9:16 shape is shorter than the 19.5:9 and 20:9 panels on the newest phones, so on a very tall device this wallpaper may be centered with a slight crop or scaled to fit. On QHD 16:9 phones and as a high-resolution generic option, though, it fills the screen cleanly and gives the sharpest result thanks to its 1440-pixel width.
Because it is a higher-resolution size, make sure your source is large enough, ideally at least 1440x2560, so you are not upscaling a smaller image and losing the sharpness that is the whole point of QHD. Plan for the interface: Android lock screens show a clock in the upper area, and home screens fill the lower portion with icons, widgets, and the dock. Keep faces and focal points centered so they survive the clock overlay and any minor crop on taller phones. This tool resizes entirely in your browser, so your photo is never uploaded, it is free, and your original quality is preserved while the file is fit to the 9:16 frame. Phone specs vary, so verify your device.