Guides
Clear, practical guides to working with images — choosing a format, hitting a file-size limit, sizing pictures for the web, and more. Each one pairs with a free tool you can use right in your browser.
JPG vs PNG vs WebP: Which Image Format Should You Use? What each format is best for, the file-size and quality trade-offs, and a simple way to choose the right one every time. How to Compress an Image to a Specific File Size (for Forms, Exams & Email) Stuck with an upload that must be under 100 KB or 20 KB? Here's how to hit an exact file size for forms, exams and email — step by step. What Image Size and Resolution Do You Need? A Practical Web Guide Pixels, file size and DPI finally untangled — with concrete recommended dimensions for the web, social media and print. How to Convert iPhone HEIC Photos to JPG Why iPhone .HEIC photos won't open elsewhere — and two ways to fix it for good, including the iPhone setting that prevents it. Favicon Sizes and Formats: A Complete Guide Which favicon sizes and formats actually matter today, the exact HTML to add, and how to generate the whole package in minutes.