Convert hdiff to svg Online: hdiff2svg

You can use Tom's Editor to easily convert images from
Horizontal difference image .HDIFF to Scalable Vector Graphics .SVG.
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.

SVG

Scalable Vector Graphics is an image format with extension SVG.