PNG vs WebP: The Transparency Question

PNG and WebP both keep a transparent background, so for a logo or cut-out the choice isn't about transparency at all — it's about smaller files versus works-everywhere. WebP wins on size, often by a lot. PNG wins on compatibility, still. Which matters more depends entirely on where the image is going.

This is a narrower question than JPG vs PNG, because JPG is out of the running the moment transparency is involved — it has no alpha channel, so a transparent logo saved as JPG comes back with a white box around it. Both formats here can do the job. The question is which does it better for your case.

What they share

Both carry a full alpha channel, so partial transparency — the soft edge on a cut-out, a drop shadow fading to nothing — survives in either. Both are the right answer for logos, icons, product cut-outs, and anything with see-through areas. If you're not sure what that channel actually is, our guide on alpha transparency is the place to start.

Where they differ

Choose WebP when it's for the web

A transparent PNG can be surprisingly heavy — lossless compression has little to work with once an image has photographic or shaded content. WebP stores the same transparent image at a fraction of the size, which is exactly what a fast-loading page wants. PNG to WebP converts a logo or a whole folder, and because WebP also has a lossless mode (push the quality slider to 1), you can get a pixel-identical copy that's usually still smaller than the PNG — see lossless compression for why that's possible. Our WebP explainer covers the format in full.

Choose PNG when it has to work everywhere

Some older design tools, certain print and print-on-demand services, a few CMS uploaders, and the occasional email client still won't take a WebP. If the file is going somewhere you don't control — a client's machine, a print shop, a marketplace listing — PNG remains the safe default. If you've been handed a WebP logo and your software rejects it, WebP to PNG gets you back to the universal format with its transparency intact.

First, make sure it's actually transparent

Neither format can preserve transparency that isn't there yet. If your logo or subject still sits on a solid background, you need to cut it out first — Remove Background does that on your device and outputs a genuine alpha channel, and our guide on removing a background is blunt about the most common way people then lose the cut-out: saving it as JPG. Whichever of PNG or WebP you land on, don't let the file pass through JPG on the way.

And if the PNG you already have is simply too big, Compress PNG shrinks it without touching the alpha channel — a middle path when switching formats isn't an option.

FAQ

Does WebP support transparency like PNG?
Yes — WebP has a full alpha channel, including partial transparency, so soft edges and fades come through exactly as they would in PNG.

Is a transparent WebP smaller than a transparent PNG?
Usually, and often by a wide margin. Even WebP's lossless mode tends to beat PNG on size while staying pixel-identical.

Should I use PNG or WebP for a logo on my website?
WebP, for the smaller file — with a PNG fallback if you need to support very old browsers or hand the logo to software that might reject WebP.