Enter the number of players as 4, 8, 16 or 32. Next, enter all of the players names, ensuring that there are as many lines in the textbox as the number provided in step 1. Select your options, and then hit the "generate" button.
Now use the selection boxes when a player wins to denote that they are moving forward in the tournament. And don't forget to have fun!
PureBracket is released under the terms of the MIT Open Source License. Check out the repo on GitHub.