Can two people have the same name?

Yes. Each line stays distinct; use Name #2 or Name #3 when a rule must reference a later duplicate.

Does 'keep apart' mean different rows?

No. It prevents direct left, right, front, or back adjacency. It does not require different rows or block diagonal proximity.

What makes the selection random?

The tool uses the browser's Web Crypto getRandomValues source and unbiased integer selection. Filters and constraints change the eligible set, not the chance among remaining valid choices.

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Secure browser-local randomizer

Random seating chart generator

Place every participant into a rectangular grid without merging repeated names. You can pin specific people to exact coordinates and keep selected pairs from sharing an edge.

Tool controls

ローカル名簿の受け渡し

名前だけを渡します。出欠、タグ、制約、重み、画像、結果は引き継ぎません。

このブラウザ内だけに保存します。別端末へ移す場合はJSONをエクスポートしてください。

このツールは 1～20 件の名前に対応しています。

名簿JSONをインポート

ParticipantsOne participant per line. Repeated names stay as separate rows.

RowsColumns

Fixed seatsUse Name -> row,column for seats and Name -> Name for separated neighbors.Neighbors to keep apartUse Name -> row,column for seats and Name -> Name for separated neighbors.

Set the options, then generate a result.

How it works

Enter participants and choose a grid of up to 10 × 10 seats.
Add optional fixed seats and neighbor-separation rules.
The solver searches randomized valid layouts and shows every coordinate, including empty seats.

Worked example

A 3 × 4 grid with ten participants contains two labeled empty seats. A fixed entry such as Lee -> 1,3 always occupies row 1, column 3.

Limits and checks

The grid has 1–100 seats and must be large enough for every participant.
Separated pairs may not share a horizontal or vertical edge; diagonal seats are allowed.
Impossible fixed-seat or separation combinations produce an error and are never silently ignored.

Privacy

Entries and results stay in this tab by default. Only when you choose to save a roster are its names stored in this browser. Tags, constraints and results are not included in the roster handoff. Tool values are not sent to URLs, analytics or servers; export happens only when you choose it.

Frequently asked questions

Can two people have the same name?: Yes. Each line stays distinct; use Name #2 or Name #3 when a rule must reference a later duplicate.
Does 'keep apart' mean different rows?: No. It prevents direct left, right, front, or back adjacency. It does not require different rows or block diagonal proximity.
Do my entries leave this device?: Entries and results stay in this tab by default. Only when you choose to save a roster are its names stored in this browser. Tags, constraints and results are not included in the roster handoff. Tool values are not sent to URLs, analytics or servers; export happens only when you choose it.
What makes the selection random?: The tool uses the browser's Web Crypto getRandomValues source and unbiased integer selection. Filters and constraints change the eligible set, not the chance among remaining valid choices.