Free Clipboard Viewer is a portable tool which can display, save and reload the contents of your clipboard.

At its simplest, you could use the program to check whether the clipboard is entirely empty (if not, clicking "Delete" clears it).

Copy and paste some text to the clipboard and it'll appear, usually in several formats. Select a chunk of text and an image in Chrome, for example, and the clipboard will hold the plain text in items called "Text" and "Preview", while the source code is held in "HTML Format".

This extra information can be useful for computer forensics. If a PC has an image in its clipboard, then running Free Clipboard Viewer may tell you which application placed it there, and - if it was copied from a browser - you'll also get the source URL.

Free Clipboard Viewer can also save the entire contents of the clipboard to a file, and reload them later. This might be useful for testing purposes, and also means you can restore the clipboard after rebooting, or even move it between PCs.