Explainer1 min readUpdated June 29, 2026

What is SVG?

Short answer

SVG (Scalable Vector Graphics) describes an image as shapes and paths in XML text rather than a grid of pixels. Because it is math, not pixels, it stays sharp at any size, which makes it ideal for logos, icons, and illustrations.

Vectors, not pixels

PNG and JPG store a fixed grid of pixels, so enlarging them shows blur or blocky edges. SVG instead stores instructions, such as 'draw a circle here', which the browser renders crisply at any size.

<svg viewBox="0 0 100 100">
  <circle cx="50" cy="50" r="40" fill="#2563eb" />
</svg>

An SVG is readable text

When SVG is the right choice

Logos and icons that must stay sharp on every screen
Illustrations and diagrams with flat colors and shapes
Graphics you want to style or animate with CSS
Tiny file sizes for simple shapes

When to avoid it

SVG is a poor fit for photographs. A photo has too much detail to describe as shapes, so it would produce a huge, complex file. Use JPG, WebP, or AVIF for photographs instead.

SVGs can contain scriptsBecause SVG is code, a malicious SVG can embed scripts. Treat SVG files from untrusted sources with care, just like any other code.

Try it: SVG PreviewPreview and inspect SVG markup locally in your browser.Open tool

References

Questions

Is SVG better than PNG?

For logos, icons, and flat illustrations, yes, because it scales without losing quality. For photographs, no, because a raster format like JPG or WebP is far more efficient.

Can I edit an SVG in a text editor?

Yes. SVG is XML text, so you can open and edit it in any code editor, change colors and sizes, and even animate it with CSS.

Do these tools upload my images?

No. Utilumo's image tools decode, edit, and export pictures inside the browser tab. The files are never uploaded or stored on a server.