SVG Sprites vs Icon Fonts: Which to Choose

SVG Sprites vs Icon Fonts

For years, icon fonts like Font Awesome dominated web icon delivery. They packed hundreds of glyphs into a single font file and let developers insert icons with CSS classes. However, SVG sprites have largely replaced icon fonts as the preferred approach. Here is why.

Rendering Quality

Icon fonts are rendered as text by the browser, which means they are subject to font anti-aliasing algorithms. On some systems — particularly Windows with ClearType — icons can appear blurry, uneven, or misaligned. SVG sprites render as vector graphics with pixel-perfect precision at every size and on every platform.

Multi-Color Support

Icon fonts are limited to a single color per glyph because they are treated as text characters. You can only change the color with color in CSS. SVG sprites support unlimited colors, gradients, and even animations within a single icon.

Accessibility

Screen readers often announce icon font glyphs as random characters or skip them entirely, requiring extra ARIA attributes to work correctly. SVG icons can include <title> and <desc> elements that screen readers understand natively, providing better out-of-the-box accessibility.

<!-- Icon font (needs extra ARIA) -->
<i class="fa fa-home" aria-hidden="true"></i>
<span class="sr-only">Home</span>

<!-- SVG sprite (accessible by default) -->
<svg role="img" aria-labelledby="home-title">
  <title id="home-title">Home</title>
  <use href="#icon-home"/>
</svg>

File Size

For small icon sets (under 50 icons), SVG sprites are significantly smaller than a full icon font. Icon fonts include every glyph in the set even if you only use a handful. With SVG sprites, you include only the icons you actually use.

CSS Control

SVG sprites support fill, stroke, stroke-width, opacity, and CSS transforms on individual parts of an icon. Icon fonts only support properties that apply to text: color, font-size, text-shadow.

Migration Path

If you are currently using an icon font, migrating to SVG sprites is straightforward: export each icon as an SVG file, combine them into a sprite, and replace <i class="fa fa-x"> with <svg><use href="#icon-x"/></svg>.