Seeded, with every game numbered. 126 games plus 1 if necessary. Free PDF, no ads, no sign-up.
With 64 teams every team plays in the first round, so there are no byes. Seed 1 plays seed 64, seed 2 plays seed 63, and so on.
It's double elimination: a team is out after its second loss. Seeds 1 and 2 start on opposite halves of the winners' bracket. Teams that lose in the winners' bracket drop into the losers' bracket ("Loser of 3" means the team that lost game 3 plays there next). Every team is guaranteed at least two games.
There are 126 games, plus one more if necessary: if the losers' bracket team wins the final, both teams have one loss and they play once more for the title. The sheet is two pages: the winners' bracket, then the losers' bracket and the final.
Game numbers match SportsGrove's brackets and the common printable sheets, so a printed copy lines up with a bracket you run online.