About WebP to JPG
You saved an image from a website, it came down as a `.webp`, and the program you want to use refuses to open it. That is very nearly the only reason anyone searches for this conversion, and JPG is usually the right destination.
Why not PNG? Both PNG and JPG are universally supported, so either solves the compatibility problem. The difference is size. WebP is a compressed format, and converting to PNG — which is lossless — commonly makes the file *ten times larger* because PNG cannot discard anything. JPG is also lossy, so the file stays a sensible size. Unless you specifically need transparency, JPG is the better target.
The transparency caveat. JPG has no alpha channel. If your WebP has transparent areas — most logos, icons and product cutouts do — those areas become white. That is usually what people expect, and it is better than the black background a naive conversion produces, but it is permanent. If the transparency matters, convert to PNG instead.
About quality loss. Both formats are lossy, so this is a re-encode: the WebP was already compressed, and the JPG compresses the decompressed result again. At quality 90 the second pass is essentially invisible. It is worth knowing the principle though — every lossy round trip costs a little, so convert from the best original you have rather than from an already-converted copy.
Animated WebP gives you only the first frame. JPG cannot hold animation at all. For an animated source you need GIF or a video format, neither of which is produced here.
A note on file size. Because both formats are compressed, the JPG will usually land in the same ballpark as the WebP — sometimes slightly larger, sometimes smaller, depending on the image. That is quite different from converting to PNG, where a tenfold increase is normal.
Batch up to 30 files at once. Everything runs in your browser using its own image codecs, so nothing is uploaded, there is no queue, and there is no size limit imposed by someone else's server.
Questions
Why can nothing open my WebP file?
WebP is well supported in browsers but not in much desktop, print or older design software. JPG is opened by essentially everything.
Should I convert to JPG or PNG?
JPG unless you need transparency. Converting to PNG is lossless and often makes the file around ten times larger.
What happens to transparent areas?
They become white, because JPG has no alpha channel. Convert to PNG if you need transparency kept.
Does converting lose quality?
It is a lossy re-encode, but at quality 90 the difference is invisible. Always convert from the best original you have rather than a converted copy.