Miscellaneous
Tournament Bracket Generator - Single Elimination
Generate and fill a single-elimination tournament bracket. Enter up to 64 team or player names, then click to advance winners round by round.
Tournament bracket formats
- Single elimination: one loss eliminates a player/team. Simple and fast. With n participants, there are n-1 total games. Used in most major sports playoffs.
- Double elimination: requires two losses to be eliminated. Fairer than single elimination but takes up to 2n-1 games. Common in esports and smaller tournaments.
- Round robin: every participant plays every other participant. Most fair, but requires n(n-1)/2 games. Too many games for large fields.
Seeding and byes
Seeds rank participants by expected performance so the best competitors meet late in the bracket, not early. When the number of participants isn't a power of 2, some participants get a "bye" - an automatic advancement in the first round.
How many rounds does a bracket need?
For single elimination, the number of rounds is the ceiling of log₂(n):
| Participants (n) | Rounds needed | Total games |
|---|---|---|
| 2 | 1 | 1 |
| 4 | 2 | 3 |
| 8 | 3 | 7 |
| 16 | 4 | 15 |
| 32 | 5 | 31 |
| 64 | 6 | 63 |
| n (any) | ⌈log₂(n)⌉ | n − 1 |
Every single-elimination bracket always plays exactly n − 1 games regardless of the number of rounds, because each game eliminates exactly one participant.
Swiss system
The Swiss system is an alternative format where every player participates in every round - nobody is eliminated. Players are paired against opponents with a similar score: in round 1 pairings are random; from round 2 onward, players are paired against others who have the same or closest win/loss record. After a fixed number of rounds (usually ⌈log₂(n)⌉), the player with the highest score wins. The Swiss system is widely used in chess and trading-card game tournaments because it determines a clear ranking without requiring elimination games.
Bracket fairness and seeding placement
Proper seeding prevents the two strongest competitors from meeting too early. The standard placement for a 4-person bracket puts #1 vs #4 on one side and #2 vs #3 on the other, so the top two seeds can only meet in the final. For 8-person brackets the standard seeding is 1/8, 4/5, 2/7, 3/6, which ensures #1 and #2 cannot meet before the semifinal, and #1 and #3 cannot meet before the semifinal either.