PNG to WebP: Smaller Files, Same Transparency
WebP keeps PNG transparency at a fraction of the file size. When to convert, quality settings that work, and a free in-browser converter.
By Formatly
PNGs are everywhere — screenshots, logos, graphics — and they’re heavy. WebP gives you the same transparency and near-identical quality at 25–35% smaller file sizes. If your site serves PNGs to browsers, you’re paying for bytes nobody can see.
When PNG → WebP makes sense
Do convert: photos saved as PNG, screenshots, web graphics, anything displayed in a browser. Don’t bother: tiny UI icons where the PNG is already a few KB, or files headed to print workflows that demand PNG.
The one real gotcha: WebP is lossy by default (it has a lossless mode, but the quality slider is what you’ll use). At 85–90% quality, the difference from the PNG is invisible — and the file is dramatically smaller.
Transparency survives the trip
This is the part people get wrong: converting PNG to WebP does not flatten transparency. WebP has a proper alpha channel, so logos and cutouts keep their see-through backgrounds. (Going the other direction, PNG → JPG, is what kills transparency — that conversion needs a background color.)
Do it privately, in batches
Our PNG to WebP converter runs entirely in your browser: drop a batch of PNGs, set the quality, download individually or as one ZIP. No uploads, no watermarks, no accounts. Pair it with the image compressor afterwards if you need files even smaller, or go the other way with WebP to JPG when an old app demands JPEG.