Learn everything about SVG — how it works, what it can contain, and when to use it over PNG or JPEG.

SVG stands for Scalable Vector Graphics. It is an XML-based image format designed for two-dimensional vector graphics. Unlike raster formats such as PNG and JPEG — which store images as a fixed grid of colored pixels — SVG describes images using mathematical definitions of shapes, paths, text, and colors.

Why SVG Matters

The most important property of SVG is resolution independence. Because each element is defined mathematically, the browser can render it perfectly at any zoom level. A logo stored as SVG looks identically crisp whether displayed as a 16-pixel favicon or a 10-meter-wide print banner. There is no blurring, no pixelation, and no quality loss at any size.

This makes SVG the format of choice for logos, icons, UI elements, infographics, diagrams, maps, and any graphic that needs to appear at multiple sizes across different devices and screen resolutions.

How SVG Files Work

An SVG file is a plain-text XML document. You can open any SVG in a text editor and read its structure. The browser reads the XML and renders shapes mathematically — no matter how far you zoom in, edges remain perfectly smooth.

SVG supports basic shapes (rectangles, circles, ellipses, polygons), arbitrary paths (Bezier curves and arcs), text, gradients, clipping, masking, filters, and animations. It can also embed raster images via the <image> element.

SVG vs Raster Formats

SVG excels at graphics with defined shapes, solid colors, and clear edges — logos, icons, illustrations, charts, and UI elements. For these use cases, SVG files are often smaller than PNG equivalents and always sharper. However, SVG is not the right format for photographs. A photograph contains millions of unique color values with no clear geometric structure, making vector representation impractical.

When Should You Use SVG?

  • Logos and brand marks at many sizes
  • Icons for web interfaces and apps
  • Infographics, charts, and data visualizations
  • Maps and diagrams users may zoom into
  • UI illustrations (onboarding screens, feature graphics)
  • Graphics that need CSS/JavaScript animation or interaction

How to Create SVG Files

Design tools like Adobe Illustrator, Figma, Sketch, and Affinity Designer all export SVG natively. The free, open-source Inkscape saves directly to SVG. You can also write SVG by hand in any text editor since it is XML. For converting existing PNG images, tools like Shape to Vector analyze pixels and trace shapes into vector paths automatically — perfect for logos, icons, and flat illustrations.