Convert hdiff to webp Online: hdiff2webp

You can use Tom's Editor to easily convert images from
Horizontal difference image .HDIFF to WebP .WEBP.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

HDIFF

Horizontal difference image is an image format with extension HDIFF.

WEBP

WebP is an image format with extension WEBP.