Bracket Maker is a free online tournament bracket generator. Open the page and the bracket is already there: choose single elimination, double elimination or round robin, set the number of teams, type the names. Seeds and byes are placed for you. A bye is not drawn as an empty game, so a 9-team bracket looks like a 9-team bracket. Enter scores, or tap the team that won, and winners move on.
Printing is free at every size. The bracket fits one page up to 32 teams; larger ones are split across pages so the lines stay wide enough to write on. A PNG download is there for documents and slides.
Nothing needs an account. With a free account you can save a bracket and get one live link: everyone who opens it sees each score as it goes in. For the day of the event, a pass adds a scorers' link, so helpers at each court enter results from their own phones, and a big-screen view for a TV or projector. An event pass is $4.99 once; a season pass is $39 for 12 months.