PNG vs SVG: Raster Bitmap vs Scalable Vector Graphics
Technical comparison between Portable Network Graphics (PNG) and Scalable Vector Graphics (SVG).
Choose SVG for logos, UI icons, line art, and typography that must scale infinitely without pixelation. Choose PNG for high-detail raster photography, complex textures, and screenshots where vector curves would be too complex.
Technical Specification Matrix
Direct architectural comparison between PNG and SVG
| Feature / Metric | PNG Specification | SVG Specification |
|---|---|---|
| Underlying Technology | Raster bitmap pixel grid | XML coordinate geometry & Bézier curves |
| Resolution Scalability | Fixed resolution (pixelates when enlarged) | Infinite resolution (sharp at any scale) |
| Alpha Transparency | 8-bit alpha channel (256 levels of opacity) | Full path fill and stroke opacity |
| File Size Behavior | Increases with pixel dimensions (width x height) | Increases with path complexity and node count |
| CSS & JS Interactivity | None (Static image element) | Fully scriptable, stylable, and animatable |
| Best For | Screenshots, photos with transparency | Logos, icons, laser cutting, UI vectors |
Decision Matrix: Which Format Should You Use?
Recommended format choices by practical real-world scenario
Renders razor-sharp on Retina 4K displays and mobile phones from a single lightweight vector asset.
Captures pixel-perfect UI elements, anti-aliased fonts, and subtle gradients without complex node geometry.
Machine toolheads follow vector paths and outlines directly; raster pixels cannot be routed directly without vectorization.
SVG files with millions of Bézier nodes cause browser rendering lag and huge file sizes; PNG rasterizes them compactly.
Frequently Asked Questions
Expert answers to common PNG vs SVG questions
Can I convert a PNG image into a vector SVG?
Does SVG load faster than PNG on websites?
Will SVG look pixelated on high-DPI displays?
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