How to resize an image
Open an image, type the width or height in pixels, and download. With "Keep aspect ratio" on, the other dimension adjusts automatically so the photo never looks stretched.
Common sizes
Profile pictures: 400×400. Instagram post: 1080×1080. Instagram portrait: 1080×1350. YouTube thumbnail: 1280×720. Full HD wallpaper: 1920×1080. Passport-style photo grids often ask for specific pixel dimensions too — check your form's requirements and type them in exactly.
Does resizing reduce file size?
Usually, yes — fewer pixels means fewer bytes. If you need to hit an exact file size in KB, use our Compress Image tool instead, which targets a byte size rather than dimensions.