A practical guide
Keep transparency available while trying a web-oriented file.
This route converts a still PNG into WebP locally. It is useful for websites that accept WebP and need a potentially more compact alternative to a detailed or photographic PNG. WebP can retain transparent pixels, so logos, cut-outs, and overlays do not need the solid background required by JPG.
The selected quality controls lossy color encoding, while alpha remains supported by the target format. That can introduce subtle changes around gradients, textures, and sharp colored edges, so inspect the preview instead of treating the conversion as automatically equivalent. Simple palette-style PNG graphics may already be smaller, and some external tools or upload forms may not accept WebP.