You've probably seen tag clouds on web pages, which aim to summarise a conversation or a collection of tags by using a word's size on a diagram to reflect its importance.
A tag cloud, or more generally a word cloud, is a neat way to summarize a document. It looks pretty, and actually tells you a lot more about the file than you might imagine.
So here's news of a free web site that will turn any document file from your PC into a word cloud. Just head to http://timc.idv.tw/wordcloud/en/# and choose the Local File option from the menu. Browse to the text file that you want to convert, and then wait a couple of seconds before clicking to see the finished results.
Plain text files work best, and the longer the better. As you can see from the example below. I guess you can probably tell what I was writing about.