Comparison
SVG vs PNG: When to Use Vector vs Raster Images for Web, Icons, and Logos
TL;DR
| SVG | PNG | |
|---|---|---|
| Type | Vector (math) | Raster (pixels) |
| Scalability | Infinite (no pixelation at any size) | Fixed resolution — scales up blurry or via AI upscaling |
| File size (small icon) | ~1-3 KB (compressed text) | ~2-10 KB |
| File size (photo) | Very large — vectors can't represent photos efficiently | ~200 KB-2 MB (compressed pixels) |
| CSS styling | Full CSS control (fill, stroke, animations) | No inline CSS — use img tag styling only |
| Transparency | Any shape (vectors are inherently masked by shape) | Alpha channel per pixel (8-bit) |
The options in depth
SVG
The vector powerhouse — icons, logos, illustrations, diagrams.
SVG describes images as XML: <circle>, <rect>, <path>, <text>. It's infinitely scalable and can be styled with CSS and animated with JavaScript. Icon libraries (lucide, Heroicons) ship exclusively in SVG. The downside: complex SVGs with thousands of nodes can be slower to render than an equivalent PNG, and SVG can embed <script> — unsanitized user uploads can carry XSS payloads.
Good for
- ·Icons and logo libraries
- ·Diagrams and data visualizations
- ·Any image that needs to look sharp on 1×, 2×, and 3× screens
Avoid when
- ·Photographs (SVG can't represent photos efficiently)
- ·User-uploaded images (XSS risk)
- ·Very complex illustrations with thousands of paths (render performance)
PNG
The pixel-perfect raster — screenshots, photos, images with transparency.
PNG is a lossless raster format supporting full alpha transparency. It's the right choice for screenshots (exact pixel representation matters), images that require a precise alpha mask, and photos where lossless quality is essential. PNG is larger than JPG or WebP for photos, but its lossless compression guarantees zero quality loss.
Good for
- ·Screenshots (exact pixel representation)
- ·Images with text overlays
- ·Transparency without the SVG security implications
Avoid when
- ·Icons needed at multiple resolutions (SVG)
- ·Photos (WebP is ~5× smaller for equivalent quality)
Which one should you pick?
→ SVG or PNG for my website icon?
SVG — always. It's smaller (2-3 KB vs 5-10 KB), infinitely sharp, and theme-aware (can respect prefers-color-scheme via CSS). Use PNG only for screenshots and photos.
Common pitfalls
- ⚠SVG can be an attack vector: user-uploaded SVGs can contain <script> or event handlers that execute when loaded in an <object> or <iframe> tag. Serve SVGs inside <img> tags to prevent script execution.
- ⚠PNG compression is lossless — it compresses by reducing redundancy, not by discarding quality. A 300 KB PNG saved from Photoshop and a 300 KB JPG at 80% quality are very different: the PNG has no artifacts.
Frequently Asked Questions
Can I convert SVG to PNG?
Yes — use our SVG to PNG Converter. The SVG is rasterized at the dimensions you select. For icons needed at multiple sizes, export at 2× and 3× to avoid pixelation.