Why WebP Usually Beats PNG for Images That Need Transparency

PNG's long-standing role

PNG has been the default choice for images needing transparency since long before most modern alternatives existed — logos, icons and graphics with transparent backgrounds are still very commonly saved as PNG simply out of habit and broad compatibility.

What WebP does differently

WebP, a more modern image format, supports the same kind of alpha-channel transparency that PNG does, but uses more advanced compression techniques developed decades after PNG's original design. The practical result is that a WebP version of the same image with the same transparency typically comes out noticeably smaller in file size than the equivalent PNG, at visually similar quality.

Why file size still matters for transparent graphics

Transparent PNGs are often used for things like logos and icons that appear repeatedly across many pages of a website, so their file size directly affects how fast every one of those pages loads. Shrinking a frequently-reused transparent graphic with WebP compounds across every page view.

The main trade-off: compatibility

WebP is now widely supported by modern browsers, but some older software, email clients and design tools still don't recognize it, which is why PNG remains the safer default in contexts where you can't control what will open the file.

Try it yourself

Our PNG to WebP converter preserves your image's transparency while typically producing a smaller file, right in your browser.