Toss your PNG files anywhere on this page to convert PNG to WebP free. Every file becomes a much smaller WebP with transparency intact, and your images stay completely private the whole time. No upload, no file cap, no signup.
The transparency problem, solved
The usual reason a huge PNG is stuck being a PNG is transparency: logos, product cutouts, UI elements. Convert to JPG and the see-through parts turn white. WebP supports full alpha transparency, so the cutout stays a cutout and the file still shrinks dramatically. It's the only sane web format for transparent images that need to be small.
How much smaller are we talking?
A lot. PNG stores every pixel losslessly, which is brutal for anything photographic or gradient-heavy. The same image as WebP is routinely a quarter of the size or less, at quality nobody can tell apart. The default here is Maximum (0.95); drop to Balanced or Smaller if you're squeezing thumbnails.
FAQ
Does the transparency really survive?
Yes. WebP has full alpha channel support, so transparent and semi-transparent areas come through exactly as they were in the PNG. No white boxes.
When should I keep the PNG instead?
When the image is going somewhere other than a website. Some desktop apps, older tools, and print workflows still want PNG. For anything served on a web page, WebP wins.
Are my images private?
Completely. Each image converts on the spot and saves straight to your Downloads folder. Your images are never uploaded, stored, or seen by anyone. Skeptical? Here's how to check.