Convert PNG to WebP — transparency kept, nothing uploaded
PNGs are wonderful for editing and terrible for page weight — a full-color screenshot or product image saved as PNG can be many times larger than it needs to be for the web. WebP solves this while keeping the feature PNG users care about most: alpha transparency. Drop your PNGs here and they are re-encoded as WebP by a WebAssembly build of the codec, running entirely inside your browser. No server receives your files, no account is needed, and batch conversion means you can process an assets folder in one go. Use the quality slider to trade size against fidelity; transparency survives either way.
How it works
- Drop .png files below (multiple at once works).
- Set the quality — higher preserves more detail, lower shrinks further.
- Download the resulting .webp files.
Frequently asked questions
Will transparent backgrounds survive the conversion?
Yes. WebP fully supports alpha transparency, so logos, icons, and cut-out images keep their transparent regions exactly as in the PNG.
Is the WebP output lossy?
This tool encodes lossy WebP at the quality you choose, which is where the big size savings come from. At quality 85+ the difference from the PNG is very hard to spot; for pixel-critical graphics you may prefer to keep the PNG.
How big are the savings for typical PNGs?
Often dramatic — photographic or screenshot content stored as PNG can shrink by 70–90%, because PNG is lossless and was never designed for that kind of image. Simple flat-color graphics see smaller (but still real) gains.
Do you store or even see my images?
Neither. Conversion happens in your browser through WebAssembly — there is no upload step at all, so there is nothing for us to see, store, or delete.