Guides.
Plain answers about images, PDFs and file sizes.
KB, MB and GB Explained in Plain WordsWhat KB, MB and GB really mean, how many of one fit in another, and why a website may reject a file that looks small enough.JPG vs PNG vs WebP: Which Image Format Should You Use?A simple guide to choosing between JPG, PNG and WebP, with clear advice for photos, logos, screenshots and websites.How Image Compression Works Without Ruining Your PhotosWhat happens when an image is compressed, why quality falls slowly and then suddenly, and how to keep photos looking good.How to Prepare a Photo and Signature for Online FormsA step-by-step way to meet the size, shape and format rules on online applications, and avoid last-minute upload errors.Why Your PDF Is So Large, and How to Make It SmallerWhat makes PDFs heavy, how to get past email attachment limits, and when compressing can hurt your document.