Copy a file from the desktop and paste it in the contentEditable element and/or the input. If you paste an image and can be read, it will be shown in the output.
Extra info available in the console

Paste a file here

Firefox allows pasting both on the input and the div, and taking as source a file from the desktop or an image from the clipboard

It works in MacOs:


Safari. There's a file in the data, but it can't be read.