How to Create a CSS Sprite Sheet

A CSS sprite sheet is a technique where you combine multiple images into a single file and use CSS background-position to display different sections. This reduces HTTP requests and improves page performance.

What you'll learn

  • What sprite sheets are and why they're useful
  • How to create a sprite sheet from individual images
  • CSS techniques to display specific sections
  • Interactive examples with dinosaurs
  • Performance benefits and best practices

Why use sprite sheets?

Benefit Explanation
Fewer HTTP requests One image instead of many = faster loading
Smaller total size Combined + compressed often smaller than sum of parts
Smoother animations Combine animation frames in one sprite
Easy state changes Hover/active states without extra requests
Browser caching Single file cached, reused across pages

How it works

  1. Combine images into one large PNG/JPG
  2. Calculate positions of each image within the sprite
  3. Use CSS background-image to load the sprite
  4. Set background-position to show specific sections
  5. Size container to show only one section

Note: Modern alternatives include SVG sprites and CSS Grid, but PNG sprites remain popular for performance.

Let's start → 02-creating-your-sprite.md