WEBP usually needs far fewer bytes than PNG for the same picture. The trade is that this page writes lossy WEBP at 92% quality, so small differences are discarded to get there. Transparent areas, though, are kept as they are. Both file sizes appear when it finishes, so you can judge whether the saving was worth it.
This page loads no libraries at all. The work is done by the browser itself. Your file is read on your own machine and never sent anywhere. Open your browser’s network tab and watch while you use it.
No. It is written at 92% quality, so detail is discarded to save space. There is no lossless setting on this page, so keep the PNG if you need a copy that matches pixel for pixel.
Yes. No background is painted behind the picture, so transparent pixels stay transparent. Converting to JPG is the case where those areas turn white instead.
That happens with small flat graphics, where PNG was already efficient. You still get the WEBP. The page does not compare the two and pick for you, but it shows both sizes, so the decision stays yours.
No. It takes one file per run: drop several and the first one is converted. The result appears with a preview and a download button, and then you can pick the next file.
Everything here is free and works the same way, in your browser.
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