PNGifier

PNG vs SVG: What's the Difference?

PNG is a raster format — a fixed grid of pixels. SVG is a vector format that describes shapes with maths, so it scales to any size without losing sharpness. Use SVG for logos, icons, and illustrations; use PNG for photographs, screenshots, and anything with fine raster detail.

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What's the real difference: raster vs vector?

PNG stores an image as a grid of coloured pixels. SVG stores a set of instructions — paths, shapes, and text written in XML — that the browser draws on demand. The practical consequence is scaling: enlarge a PNG and the browser has to invent pixels, so edges blur; enlarge an SVG and it re-renders perfectly, because it's redrawn from the maths every time.

PNG vs SVG at a glance

FeaturePNGSVG
TypeRaster (pixels)Vector (maths)
ScalingFixed resolutionInfinite, lossless
Stored asBinaryXML text (editable)
PhotographsExcellentImpractical
Animation / stylingNoYes (CSS, SMIL)
Best forPhotos, screenshotsLogos, icons, line art

Which makes smaller files?

It depends entirely on the image's complexity. A simple icon as SVG can be a few hundred bytes — far smaller than the same icon as a PNG. But file size for SVG grows with the number of shapes, so a detailed illustration can balloon, and a photograph as SVG is either gigantic or simply not feasible. Rule of thumb: flat graphics favour SVG; photographic or textured detail favours PNG.

How do editing and animation differ?

Because an SVG is text, you can open it in a code editor, tweak a colour or path by hand, style it with CSS, and animate it — all without losing quality. A PNG is a flat raster you edit in a pixel editor, and every edit is baked into fixed pixels. For interactive, themeable, or resolution-independent graphics, SVG is far more flexible.

Is there a catch with SVG?

One worth knowing: because an SVG is code, it can contain embedded scripts. Only use SVGs from sources you trust, or sanitise them before displaying user-supplied files. A PNG is just image data and can't execute anything, which makes it the safer choice for untrusted uploads.

How do you convert between PNG and SVG?

Going from vector to raster is easy and exact: convert SVG to PNG to produce a fixed-size image for platforms that don't accept vectors. Going the other way means tracing, which only suits simple graphics — see what a PNG is for why a photo can't become a clean SVG.

Frequently asked questions

Can you convert PNG to SVG?
Only by tracing — automatically redrawing the image as vector paths. That works well for simple, flat graphics like logos, but it approximates the image and is unsuitable for photographs.
Is SVG always smaller than PNG?
No. For simple shapes an SVG can be a few hundred bytes, far smaller than a PNG. But for a photograph an SVG would be enormous or impractical, while PNG handles it efficiently.
Does SVG lose quality when you scale it?
No. SVG re-renders sharply at any size, from a favicon to a billboard. A PNG enlarged beyond its pixel dimensions becomes soft or blocky.
Which is better for a logo?
SVG. A vector logo stays crisp at every size and can be restyled with CSS. Keep a PNG version only for places that don't accept SVG, like some social platforms.