Why you keep ending up with WebP files
Browsers and websites serve WebP because it's roughly 25 to 30 percent smaller than JPG at comparable quality, so right-clicking and saving a picture increasingly hands you a .webp file. The format is excellent for the web and awkward almost everywhere else: older photo viewers, printing kiosks, some Office versions, upload forms, and plenty of desktop software still expect JPG or PNG and reject WebP outright. If you've ever renamed a .webp to .jpg and had it still refuse to open, that's why — the extension changed but the data didn't.
What happens when you convert
Drop your .webp files and each one is decoded by the browser, painted onto an off-screen canvas in a Web Worker, and encoded as a JPG — the whole pipeline runs on your hardware. Because nothing is transmitted during conversion, speed depends only on your device, and there is no copy sitting on a server afterward for you to wonder about. Convert a whole batch at once: three files process in parallel, every result shows its original and converted size, and downloads come individually or bundled into one ZIP. No account, no daily quota, no watermark.
A note on transparent WebP images
Some WebP images carry an alpha channel. JPG cannot represent transparency, so any transparent regions get filled with solid white during conversion. For a logo or sticker that needs its transparent background kept, choose PNG as the target instead — there's a separate WebP to PNG tool on this site for exactly that case.