Resize images to exact dimensions in your browser.
Resize a picture to exact pixel dimensions or by percentage for websites, social media, forms and email. Smaller dimensions mean smaller files, which load faster and upload more easily.
Lock the aspect ratio so the image is not stretched. If you need a different shape, crop first and then resize.
Making a picture smaller keeps it sharp, but enlarging a small picture makes it blurry, because new pixels must be guessed. Start from the largest original you have.