Why Chrome keeps giving you WebP
Sites serve WebP because it is small. Chrome’s Save image as often keeps that format. Older Photoshop, some printers, Word, and upload forms still want JPG or PNG.
Convert it locally
Drop the .webp on Stayontab. The browser already knows how to decode WebP, so this is usually instant. JPG has no transparency: holes become white. If you need the hole, use WebP to PNG instead.
Rename is not conversion
Changing .webp to .jpg in Explorer does not re-encode the file. The header is still WebP. Software that sniffs bytes will still refuse it. You need an actual JPEG encode — which is what this page does, in the canvas, on your device.
Ready? Use the WebP to JPG converter — files never leave this device.