Breakout groups fail before they start when people default to their work friends and every table becomes an echo chamber of the same department. A team generator fixes that in one screen-share: it mixes the room fast, visibly, and without the "who wants to work together?" shuffle that eats the first five minutes of every workshop. Here's how to run it, and how to size the groups so they actually produce something.

Make breakout groups right now

Paste your attendee list into the Team Splitter, set the number of groups, share your screen. Free, browser-based, works on a phone from the front of the room.

How to make breakout groups in three steps

This is the part that's missing from most facilitation guides. It takes about forty seconds:

  1. Paste the attendee list. Copy names from the calendar invite or the participant panel into the Team Splitter, one name per line. Stray spaces and blank lines are cleaned up for you.
  2. Set the number of groups. Decide how many breakout rooms or tables you want — or use the table below to hit a target group size — and type it in (2 to 10).
  3. Generate and share. Hit the button and share your screen. Everyone sees the same split at the same moment, which is exactly why nobody argues with it. Then drop the names into your video platform's breakout rooms, or point people to tables.

Want new groups for the next round? Generate again — the split is random every time, so back-to-back runs almost never repeat, and each attendee meets a fresh set of colleagues.

What size should a breakout group be?

The generator asks for a number of groups, so work backwards from your headcount. Match the group size to the task — quick idea generation wants small groups, a build-something workshop can take more hands:

Use caseBest group sizeWhy
Icebreaker / lunch roulette4–5Enough people to spark conversation without a long round of intros.
Brainstorm / round-robin3–4Small enough that everyone has to contribute an idea.
Retro breakout4–6Wide enough to surface disagreement, still one conversation.
Workshop build / prototype4–6Enough hands to divide the work and still make a decision.
Debate / red-team vs blue-team2 groupsSplit the whole room in half to argue opposite sides.

To convert size into a group count, divide your headcount by the target size: 24 attendees in groups of four means 6 groups. When it doesn't divide evenly, the tool gives the extra people to the first groups, so 22 into 5 comes out as two groups of 5 and three of 4 — fine for any breakout.

Need a role mix, not just random?

Pure random is perfect for icebreakers and silo-busting. But for a cross-functional exercise — where you want one marketer, one engineer and one salesperson per group — a random split will occasionally hand you an all-engineering table. The fix is a 30-second sanity check: generate, glance at the groups, and if one is lopsided, move a person by editing the list and re-splitting. The tool doesn't store named lists between sessions, so keep your attendee list in the invite or a doc you can paste from each time.

Eight ways facilitators use it

  1. Workshop breakout groups. Fresh random groups for every session so each person builds the most new connections.
  2. Round-robin brainstorms. Small groups ideate, then re-generate so ideas cross-pollinate between new partners.
  3. Red-team / blue-team. Split the room in two — one defends a strategy, one attacks it.
  4. Retro breakouts. Break a big team retrospective into smaller groups so quiet voices get heard before you regroup.
  5. Hackathon teams. Randomise who works with whom to force unexpected, cross-team projects.
  6. Lunch roulette. Monthly random groups of four for a company lunch — the simplest silo-buster there is.
  7. Onboarding icebreakers. Mix new hires from different departments on day one so their network starts cross-functional.
  8. Offsite & team-building games. Fair, mixed teams for the scavenger hunt or trivia round with zero captain politics.

Two companions make the breakout itself run smoother: use the Name Picker to appoint a timekeeper or scribe in each group, and the random wheel to set a random speaking order in a retro so the same person doesn't always go first.

Frequently asked questions

What is the ideal breakout group size?

Three to five. Below three there's not enough friction for new ideas; above six the quiet voices drop out. Four is the sweet spot for a 20-minute breakout.

How do I split a large all-hands into equal rooms?

Paste every attendee and set the group count to your number of rooms. The tool deals people out evenly and gives leftovers to the first groups, so no room ends up empty.

Does it work on a shared screen or over video?

Yes — run it in a browser tab and share your screen so everyone sees the same split, then assign the groups to your platform's breakout rooms. Nothing to install; works on a phone.

How is this better than numbering off around the room?

Numbering off is slow past fifteen people and easy to game by swapping seats. A generator is instant, visibly impartial, and trivial to re-run for the next round.

Better meetings start with better groups. Split your room now, then see how the same tool handles classroom groups, sports teams and gaming lobbies — all on the team tools hub.