A 64 team bracket is the largest standard knockout: six rounds and 63 games, the shape most people know from big college and school tournaments. Here it opens as one seeded list of 64; for four regions of 16, tick Split into 4 regions above the bracket.
The draw at 64
Every first-round pair adds up to 65: 1 v 64, 32 v 33, 16 v 49, 17 v 48 and so on. Seeds 1 and 2 sit in opposite halves, seeds 1 to 4 in different quarters and seeds 1 to 8 in different eighths, so the bracket only brings the favourites together in the late rounds if they keep winning.
Filling in a big bracket
Paste all 64 names at once (one per line, or a single line with commas). The summary line shows 64 teams and 63 games; nothing has a bye. Then pick round by round. Your picks are saved in this browser as you go, so a half-finished bracket is still there tomorrow. When an early pick changes, the later picks that depended on it are cleared, and the round tabs show what’s left.
Office pools and group picks
Everyone can fill the same 64-team bracket and send their picks with Share result: the link holds the names and the picks, and opens in a dialog with the champion and the final. Compare picks side by side, or tick Blank bracket and print empty sheets for a pool on paper.
Printing
The PDF keeps the whole bracket on one landscape page, 32 teams per side, with the final and champion box in the middle. A PNG of the same bracket works well in a group chat.