How SVG and PNG compare for page load speed, Retina displays, and bandwidth on the web.
Choosing between SVG and PNG for web assets affects page load speed, visual quality, and bandwidth costs. Here's a practical performance comparison.
File Size Comparison
For a simple 3-color logo: SVG ~3KB vs PNG @2× ~40KB. That's a 13× difference. For 20 icons on a page, SVG saves hundreds of kilobytes. For a photograph: PNG wins — SVG is impractical for photographic content.
Retina/HiDPI Screens
PNG requires 2× or 3× resolution images for Retina displays, doubling or tripling file sizes. SVG renders perfectly at any pixel density without extra files or bandwidth.
HTTP Requests
Inline SVG eliminates HTTP requests entirely — the icon is part of the HTML document. PNG images require separate requests (unless using CSS sprites, which add complexity).
Rendering Performance
Simple SVGs render faster than decoding PNG images. Very complex SVGs (thousands of paths) can be slower — but for typical web icons and logos, SVG wins.
Recommendation
Use SVG for: logos, icons, illustrations, charts, and any flat-color graphic. Use PNG for: photographs, screenshots, and images with complex textures. Convert your PNG assets to SVG wherever appropriate for faster page loads.