Random Team Generator

Yes, and this is worth a word because most shuffles are not. The naive approach — walk the list swapping each name with a random one — is measurably biased towards certain arrangements, so the same pairs recur more often than chance. This uses Fisher-Yates, which picks only from the names not yet placed, and that property is covered by tests rather than assumed.

The teams come out within one person of each other. Seventeen people into five teams is four fours and a three, not four fours and a one — the names are dealt out one at a time, like cards, rather than sliced into blocks. In "people per team" mode the last team takes the remainder rather than the leftovers being dropped.

Not yet. Constraints turn a shuffle into a rather different problem — with enough of them there may be no valid arrangement at all, and a tool that quietly gives up on one is worse than one that never offered. If you need it, the practical version is to draw and then swap two names by hand. Say so on the contact page if it would be useful.

Yes — it will divide list into groups of any kind, so breakout rooms, table plans, project pairs, review rotas and secret-santa clusters all work the same way. It does not do secret santa properly, though: that needs everyone to draw somebody who is not themselves, which is a different arrangement problem.

No. The draw happens in your browser and nothing is sent anywhere. A class list or a list of colleagues is real personal data, and there is no reason for it to leave the room to be shuffled.

Not deliberately, and that is on purpose. A reproducible draw means somebody can keep re-rolling a seed until they like the result, which defeats the point of drawing at all. Copy the teams when you get a split you are happy with.