Image resizer is a piece of software that allows you to alter the dimensions of your images without distorting them or making them blurry. This is important, because correctly sized images can help improve user experience on websites, increase sales and build trust with customers. However, it is easy to get things wrong when using an image resizer if you don’t understand how it works.

When selecting an image resizer, look for one that offers a selection frame and grid to make it easier to select the parts of your photos you want to keep. This is especially helpful if you are trying to resize multiple images at once. You should also consider whether the software supports different file formats and allows you to convert your photos to a different format if needed.

Another useful feature that some image resizers offer is the ability to adjust an image’s aspect ratio. This means that you can enter a number into either the width or height fields and the tool will automatically calculate the other dimension to ensure that your image maintains its proportions.

You can find image resizers in many places online, including free tools such as BeFunky. Alternatively, you can use the built-in image resizer in Windows 10. Just open File Explorer and right-click an image to see the options for resizing it appear. This is the old PowerToy that was included with Windows XP and earlier and was a hugely popular way to bulk resize images so they would fit on 1.44MB floppy disks or be uploaded over a 56kbps dial-up modem.