SVG vs PNG: Which One Do You Actually Need?

SVG and PNG both show images, both support transparency, and both open on every modern device. That's where the similarity ends. Choosing wrong doesn't break anything immediately — it just means your logo looks fuzzy on a banner, or your website takes four seconds to load a photo it didn't need to.

The one difference that matters

A PNG stores pixels: a fixed grid of coloured dots. An SVG stores instructions: draw this curve, fill it with that colour. Everything else follows from that.

Because an SVG is instructions, it has no resolution. It's redrawn at whatever size you ask for, so it's equally sharp on a favicon and on a lorry. Because a PNG is pixels, it has exactly one native size — enlarge it and you're stretching dots.

The flip side: instructions only work for things you can describe geometrically. A logo is a few dozen shapes. A photograph of a beach is millions of subtly different pixels, and no sane set of instructions describes it. That's why PNG isn't obsolete and never will be.

Use SVG for

• Logos and wordmarks — the whole point is that they turn up at every size
• Icons, especially on the web, where they stay sharp on high-density screens
• Line art, diagrams, charts, maps, stamps and signatures
• Anything going to a printer, an embroidery machine, a laser cutter or a vinyl cutter

Use PNG for

• Photographs and anything photographic
• Screenshots — text and interface antialiasing are pixel data, not shapes
• Complex artwork with fine texture, grain or painterly detail
• Anywhere a platform simply refuses SVG, which is still most social networks and many marketplaces

Two things people get wrong

The first is assuming that saving a PNG as .svg makes it a vector. It doesn't. Some tools will happily wrap your pixel grid inside an SVG file — the extension changes, the file is still pixels, and it still turns to mush when enlarged. If your "SVG" contains a tag starting with <image, that's what happened, and your printer will notice.

The second is thinking SVG is always lighter. For a logo, an SVG is often a few kilobytes against a PNG's hundreds — a real win. For a photo, tracing it into vector can produce a file many times larger than the PNG, because you've replaced a compact pixel grid with thousands of individual shapes. Lighter isn't a property of the format; it's a property of the match between format and content.

So what if you only have a PNG?

That's the common case, and it's fixable when the content suits it. If your logo is flat colours or line art, tracing reconstructs it as real curves and you get a genuine SVG out the other end. If it's a photo, no tool will turn it into good vector — and any tool claiming otherwise is selling you a poster filter.

VectorPop does the tracing part on your own machine: drop the PNG, pick a preset, watch the preview, export the SVG. It's free for three exports a day, and your images never leave your computer — which matters more than people admit when the logo belongs to a client.