Web Image Formats and Image Optimization

Learn the differences between common web image file formats and how to choose the right format for your website. This lecture covers JPEG, PNG, GIF, SVG, and WebP, including compression, transparency, animation, file size, and browser support. You’ll also learn practical techniques for optimizing images for faster website performance, including choosing the correct image dimensions, compressing files, checking file sizes, and using tools such as TinyPNG. The lecture also covers responsible image sourcing and copyright considerations when downloading images from the web. 00:00 Introduction: Images for the Web 00:37 Web Image Formats Overview 00:44 JPEG: Photographs and Lossy Compression 02:10 Recommended Image File Sizes 02:55 PNG: PNG-8 vs. PNG-24 04:02 When to Use PNG 04:48 GIF: Animation and Limited Color 05:55 SVG: Scalable Vector Graphics 07:22 WebP: Modern Web Image Format 07:56 Checking Browser Support with Can I Use 08:44 WebP Compression and Features 09:22 WebP and Figma 10:10 Optimizing Images for the Web 10:35 Export Images at the Correct Dimensions 11:07 Image Compression Tools 11:28 Sourcing Images Responsibly 12:40 Downloading an Image from Unsplash 13:11 Checking Image File Size and Dimensions 13:43 Compressing an Image with TinyPNG 14:38 Evaluating Compression Results 15:11 Building an Optimized Image Workflow