Paste your names, one per line. Pick how many groups you want. The split is random and balanced — and with a seed you get the same groups again later, which is what you need when a class complains about the draw.
The list is shuffled with a deterministic generator (mulberry32). With the same names and the same seed you get exactly the same groups, so a draw can be reproduced and checked. Group sizes differ by at most one, which is what you want for team exercises and classroom work.