CSS Sprite Sheets: Combine Images to Reduce HTTP Requests
Sprite sheets merge multiple icons into one image, cutting HTTP requests. How to create and use CSS sprites in modern web projects.
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Tags: image, css, performance
CSS Sprite Sheets: Reduce HTTP Requests for Icons CSS sprites are a technique for combining multiple images into a single file, then using CSS to show only the relevant portion of the combined image for each icon or graphic. The purpose is to reduce the number of HTTP requests — in environments where each request has latency overhead, loading 40 icons as 40 separate files is significantly slower than loading one combined sprite sheet. This guide explains how sprites work, how controls which part of the sprite is visible, when sprites are still useful in 2025, and tools to generate them automatically. The Problem Sprites Solve In HTTP/1.1, browsers are limited to 6 simultaneous connections per hostname. Loading 40 icon images requires multiple sequential rounds of requests — even if each…
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