Wordle is an online tool that generates word clouds from input text. A word cloud displays words more prominently based on frequency in the source text. To create a word cloud with Wordle, the user copies and pastes text into the website, clicks "Go" and a word cloud is instantly generated. The cloud can be customized further by clicking "Randomize" and adjusting font and color settings. When complete, the user can save the word cloud to the public gallery.