A worked example
Eight participants and three groups produce groups of 3, 3 and 2. Click Draw groups to generate a new random allocation.
Random groups
Shuffle 2–128 participants into balanced groups. Export the draw without uploading anyone’s name.
YOUR LITTLE WORKBENCH
Random groups
Names stay on this page. Start with the example or enter your own participants.
Current preview follows the input order. Randomization happens only when you click.
How this is calculated
Shuffle with Fisher–Yates using browser crypto randomness, then deal participants across groups in order. Group sizes differ by at most one.
YOUR PLAN / LIVE RESULT
Balanced groups
2- Participants
- 8
- Largest group
- 4
- Smallest group
- 4
The first preview uses input order until you choose Draw groups. This tool does not handle seeding pots, skill balancing or auditable public lotteries.
Group 1
- Alex
- Casey
- Emery
- Gray
Group 2
- Blair
- Drew
- Finley
- Harper
Your detailed plan
8 rows · all included in CSV| Group | Position | Participant |
|---|---|---|
| 1 | 1 | Alex |
| 1 | 2 | Casey |
| 1 | 3 | Emery |
| 1 | 4 | Gray |
| 2 | 1 | Blair |
| 2 | 2 | Drew |
| 2 | 3 | Finley |
| 2 | 4 | Harper |
THE METHOD / 01
Know what goesinto your result.
Shuffle with Fisher–Yates using browser crypto randomness, then deal participants across groups in order. Group sizes differ by at most one.
Keep the assumptions clear
The first preview uses input order until you choose Draw groups. This tool does not handle seeding pots, skill balancing or auditable public lotteries.
A FEW USEFUL ANSWERS
Good to know.
Are my inputs uploaded?
No. Calculations run locally in your browser. The host still receives normal requests for website pages and assets.
Can I keep my result?
Export a CSV, or use Print / PDF and choose Save as PDF in your browser. Inputs are not saved between visits.
Do I need an account?
No sign-up, paid API or subscription is required. Both language versions use the same calculation logic.
MATCHKIND / TOOLKIT
A little help for every step.
01
Knockout bracket
Create a seeded bracket for 2–64 players, handle byes and click winners to advance them through the rounds.
Open tool02
Round robin
Generate single or double round robin fixtures for 2–32 players, with one bye per round for odd fields.
Open tool04
Court schedule
Schedule a single round robin over multiple courts with equal match slots and an explicit gap between slots.
Open tool