SVG vs PNG for Web Performance
SVG and PNG both work on the web, but they have fundamentally different performance profiles — here's how to choose the right format for each use case.
Performance Comparison
File size is the primary performance metric for web images.
| Metric | SVG | PNG |
|---|---|---|
| Simple logo | 2–10 KB | 20–100 KB |
| Complex illustration | 50–500 KB | 50–300 KB |
| Photograph | Not suitable | 100 KB – 2 MB |
| Retina support | Native (1 file) | Needs 2× version |
| DOM interaction | Yes (CSS/JS) | No |
| Browser rendering | CPU (path math) | GPU (pixels) |
When to Use SVG vs PNG on the Web
The right format depends entirely on what type of graphic you're serving.
- SVG: logos, icons, illustrations, charts, maps — any graphic with definable vector shapes
- PNG: photographs, complex realistic images, screenshots, raster artwork
- SVG for retina: one file serves all screen densities — eliminates 1x/2x/3x PNG sets
- PNG for photos: SVG photos are huge and stylized — PNG or WebP is always better for photography
Frequently Asked Questions
Does SVG load faster than PNG for logos?
Usually yes — a simple SVG logo is typically 2–10 KB vs 50–100 KB for an equivalent high-res PNG. SVG also doesn't need a separate retina version. For complex logos: measure both formats.
Should I use SVG or PNG for website icons?
SVG for icons is strongly preferred: single file for all sizes, CSS color control, crisp on retina, and typically 70–90% smaller than PNG icon sets.
When is PNG better than SVG for web?
Always for photographs. For complex illustrations with thousands of paths that would produce large SVG files. When the target browser is IE (full IE11 support dropped in 2022 anyway).
How do I measure if SVG or PNG is faster for my specific graphic?
Use Chrome DevTools Network panel: load both in separate tabs, compare Size and Time columns. PageSpeed Insights also shows image format recommendations for your actual pages.
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