Protect GIFs from unauthorized use on the Web

Protect GIFs from unauthorized use on the Web.

To add hidden signatures to GIF- files select menu item Tools / Signature.

Button Sign chooses existing GIF- file and saves it together with hidden signature which was inputed into a field above this button.
Button Check checks presence of your signature in existing GIF- file.

Notes:

maximal text length of your signature is limited and depends on GIF coloring and size;
using of hidden signature slightly increases size of created GIF- file.