Image Resizer

Resize to exact pixel dimensions

Many places ask for an image of a specific size: a passport-style photo for an online application, a profile picture, a product photo for a store, or a banner for a website. Enter the width or height in pixels and, with Lock aspect ratio on, the other side is calculated for you so the picture is not stretched.

Aspect ratio, explained

Aspect ratio is the relationship between width and height. A 4000 × 3000 photo has a 4:3 ratio; scale it to 800 pixels wide and the matching height is 600. If you turn the lock off and type both numbers yourself, the image is squeezed or stretched to fit, which makes faces look wrong. To change the shape of an image without distortion, crop it first with the Image Cropper, then resize it.

Common target sizes

Online forms usually state their requirements in the instructions, often as both dimensions and a maximum file size. Resize first to meet the dimensions, then check the size with the Image File Size Checker and compress if needed.

Resizing many images at once

Add up to 50 images and resize them in one go. With Lock aspect ratio on, every image is resized to the width you enter (or the height, if that is the box you typed in last) and keeps its own shape, so a portrait and a landscape photo both come out 1200 pixels wide without being stretched. With the lock off, every image becomes exactly the width and height you enter. Each row shows the size it will become before you click Resize, and you can download the results individually or as a ZIP.

Shrinking versus enlarging

Making an image smaller works well, because the extra detail is simply averaged away. Making an image larger cannot add detail that was never captured; the browser smooths between pixels, so a small picture blown up looks soft. If you need a large image, start from the largest original you have.