You had a clean logo, icon, or sticker saved as a .webp file. The background was see-through — exactly what you wanted. Then you converted it to JPG, and now there's a flat white box sitting behind it. The transparency is gone, and the image looks wrong on anything that isn't a white page.
The fix is fast: convert the WebP to a PNG instead, in your browser, without uploading anything. Here's why JPG did that and why PNG doesn't.
What's actually going on
WebP supports an alpha channel — the technical name for transparency. Just like PNG, a WebP file can store pixels that are fully transparent, fully opaque, or anything in between. That's why logos, icons, and stickers are so often saved as WebP: it keeps the transparency and the file stays small.
JPG has no alpha channel. None. It physically cannot store a transparent pixel. So when you convert a transparent WebP to JPG, the converter has to put something in every see-through spot — and the default is white. That's the white box you're seeing. It's not a bug; it's JPG doing the only thing it can.
PNG, on the other hand, has an alpha channel and is lossless. Convert your WebP to PNG and the transparent areas stay transparent, with no quality loss anywhere in the image.
The fix: convert to PNG, in your browser
Drag the file in, click download, done. Batch upload supported.
Open the WebP to PNG converter →The conversion runs locally in your browser, so the image never leaves your device. There's no upload, no account, and nothing for anyone else to see. If you have a folder of WebP graphics, drop them all in at once and download them as a ZIP.
When JPG is actually the better choice
PNG isn't always the right answer. If your image is an ordinary photo with no transparency — a screenshot, a product shot, a holiday picture — there's nothing for the alpha channel to protect, and PNG will just give you a much larger file for no benefit. In that case JPG is the smarter pick: smaller and universally compatible.
If that's your situation, use the companion converter and article instead: Saved an image and it won't open? It's probably WebP. covers the WebP-to-JPG path in full.
The trade-off to know about
Keeping transparency isn't free. PNG files are larger than both WebP and JPG — sometimes several times the size — because PNG is lossless and doesn't use the newer compression tricks WebP relies on. For a logo or icon that's usually fine; the files are small to begin with. Just don't be surprised when a PNG export weighs more than the WebP you started with.
One more thing: if your WebP is animated, the converter saves the first frame only as a still PNG. PNG can't hold an animation, so the motion is dropped.