Learn about the differences between image formats, compression techniques, resolution capabilities, pixel density, and effects on user experience. Images are the most popular resource type on the web, yet understanding the nuances of various image formats and their technical attributes can be challenging. In this guide, we'll cover the popular image formats JPEG, PNG, WebP, and AVIF. We will discuss their differences in image compression, resolution, pixel density, how these factors affect the way images are presented online, and their impact on user experience. Before jumping into formats, let’s cover a few important image concepts. Link to heading Compression Algorithms Image compression reduces the size of an image file without significantly degrading its visual quality , which is important for fast data transmission and efficient caching. Whether you're viewing a website, sharing a photo over a messaging app, or storing thousands of pictures on a cloud server, image compression plays a critical role.…