Turn the image into an optical illusion
Scroll horizontally and select the type
Upload the image with the file dialog or by dragging and dropping it onto the dashed area
There are number of popular "hidden image" illusions on the Internet. Like John Lennon, WWF Panda or Hidden Animal illusion that took over the Internet.

How about creating one of your own?

Just select an image and there you go! You can download the result.
The tool is absolutely FREE.

To see the hidden image step away from the screen, zoom it out, or shake your head fast. The image is practically invisible if you look at it directly and at a regular distance.
Close
You can now download the resulting image
Use the "Open in a new tab" button if the image does not load
Download
Open in a new tab
May not work in some browsers