WebP is great for the web, but plenty of tools still refuse to open it: older photo editors, some content management systems, marketplace uploads, presentation software and design apps. Converting WebP to PNG gives you a universally supported file, and it keeps any transparency from the original intact.
PNG is lossless, so the converted file shows exactly what the WebP showed, but it cannot recover detail that a lossy WebP already discarded. Expect a larger file than the WebP, and for photographs it can be several times the size. An animated WebP is converted to a single still image using its first frame.
Because PNG is lossless there is no quality setting to choose. Each file keeps its name with only the extension changed, the dimensions are unchanged and nothing is added to the output. Drop in as many WebP files as you like and download them as one ZIP. Everything happens in your browser.
When it is worth doing: when you need to edit the image in software that does not read WebP, place it in a document or presentation, or upload it somewhere that lists only PNG and JPG. If you do not need transparency and want a smaller file, WebP to JPG is the lighter choice.
WebP is usually saved with lossy compression, while PNG stores every pixel exactly. The same picture therefore takes more space as a PNG.
Yes. PNG supports transparency, so transparent areas in the WebP stay transparent.
Only a still image is produced, using the first frame of the animation. PNG output here does not keep animation.
No. PNG is lossless, so the converted image matches the pixels of the WebP.
No. They are converted locally in your browser and never leave your device.