SVG vs PNG: When to Use Vector Images on the Web
SVG and PNG both support transparency, but they work very differently. Here's when to choose vector (SVG) over raster (PNG) — and when not to.
Both SVG and PNG are common formats for logos, icons, and web graphics. Both support transparency. But they work fundamentally differently, and choosing the wrong one can mean blurry logos, unnecessarily large file sizes, or graphics that look bad on high-resolution screens.
The Core Difference: Vector vs Raster
PNG is a raster format. It stores an image as a fixed grid of pixels — a specific number of dots with specific colors. Scale it beyond its original dimensions and it gets blurry, because there are no extra pixels to fill in the detail.
SVG is a vector format. It stores an image as mathematical instructions — draw a circle here, fill with this color, draw a line from point A to point B. Scale it to any size and it re-renders perfectly sharp, because the instructions always produce crisp output.
When to Use SVG
Logos. A company logo needs to look sharp on a business card, a website, a billboard, and a mobile screen — all at different sizes. SVG handles all of these from a single file.
Icons and UI elements. Navigation icons, buttons, and interface graphics are almost always better as SVG. They're tiny in file size, perfectly sharp on retina and HiDPI screens, and can be styled or colored with CSS.
Illustrations with flat colors or gradients. Charts, diagrams, infographics, and geometric illustrations are natural SVG territory.
Simple graphics where file size matters. A simple SVG logo might be 2–5 KB. The same graphic as a high-resolution PNG might be 50–200 KB.
When to Use PNG
Photographs and complex images. Photography contains millions of colors and continuous gradations — representing that mathematically as vector paths is impractical. Use PNG (or JPG/WebP).
Screenshots. Screenshots are inherently raster images captured pixel-by-pixel. PNG preserves every pixel exactly.
Images with semi-transparent pixels. PNG supports full alpha transparency including partial transparency, which SVG handles less naturally for complex images.
When SVG isn't supported. Email clients and some older applications don't render SVG reliably. PNG is the safe fallback.
Side-by-Side Comparison
| SVG | PNG | |
|---|---|---|
| Scales without blurring | Yes | No |
| Transparent background | Yes | Yes |
| Best for | Logos, icons, illustrations | Photos, screenshots |
| File size (simple graphics) | Tiny | Larger |
| Editable with code or CSS | Yes | No |
| Email client support | Limited | Universal |
Converting SVG to PNG
Sometimes you need a PNG version of an SVG — for email, for a platform that doesn't accept SVG, or to generate a specific pixel size for an app icon or social media:
- SVG to PNG — export your SVG as a PNG at any size
- SVG to JPG — convert to JPG (note: loses transparency)
- SVG to WebP — modern format with transparency support
Frequently Asked Questions
Can I edit an SVG like a regular image? SVG files are XML text files. You can open them in a text editor or a vector tool like Figma, Illustrator, or the free Inkscape. You can also style them with CSS directly on the web.
Should my website logo be SVG or PNG? SVG, almost always. It's sharp at every resolution, typically much smaller in file size, and you can change its color with CSS without editing the file.
My SVG looks fine but the exported PNG looks blurry — why? When converting SVG to PNG, the output pixel dimensions matter. A 100×100 px export will look blurry on a 2× retina screen. Export at 2× the display size (200×200 px for a 100×100 display) to get a sharp result.