- Are the cards actually unique?
- Yes — within a batch, no two cards are byte-for-byte identical. The generator picks a fresh shuffle for each card and rejects any that matches one already issued. For Classic Numbers the entropy is huge (75-choose-24 then column-permuted, billions of arrangements), so this is trivially true. For Custom Words with a small pool the combinatorial ceiling is smaller — if you only provide the exact minimum number of items, you'll get the same items rearranged on each card, which is still hundreds of distinct arrangements for 25 cards.
- How do I print them?
- Hit the Print button after generating. Your browser's print dialog opens with the cards as the document — they're laid out responsively, two per row on most screens, one per row at small widths. Each card has CSS page-break-inside: avoid so a card never gets split across two pages. For best results print in portrait, A4 or US Letter, default margins.
- What's the difference between 75-ball and 90-ball?
- 75-ball is the standard US format — 5×5 grid with B/I/N/G/O column headers, each column drawing from a specific range (B=1-15, I=16-30, etc.) and a free space in the middle. 90-ball is the UK format — numbers 1 through 90 drawn without column constraints, traditionally on a 3×9 ticket but commonly adapted to 5×5 here. Pick Classic Numbers for 75-ball, Number Range (1-90) for 90-ball.
- Can I add my own items — names, phrases, emojis?
- Yes — that's what Custom Words mode is for. Paste your items into the textarea, one per line. The tool warns you if you don't have enough unique items for the card size (you need 9 for 3×3, 16 for 4×4, 24 for 5×5 with free center, 25 without). Emojis, multi-word phrases, anything that fits in a cell works — keep it short so it doesn't overflow.
- Is the free space negotiable?
- It's a toggle. The traditional US bingo card has a FREE space in the center of a 5×5 grid — it counts as a marked cell from the start. Turn it off if you want every cell to require a draw; you'll need 25 unique items (or 25 numbers in the pool) instead of 24. The toggle is disabled for 3×3 and 4×4 cards because there's no traditional center cell to free.
- How many cards can I make at once?
- Up to 25 per generation. That's enough for a classroom or a small party, and keeps the print preview manageable. If you need more, generate a batch, print it, and run another batch — the cards in batch B won't be identical to batch A unless you happen to hit a collision in a tiny pool.
- Is anything sent to a server?
- No. The items you paste, the cards generated, the print — all of it lives in your browser. Nothing is uploaded, logged, or stored. Close the tab and it's gone.
- What's a good item count for a 5×5 custom bingo card?
- Aim for 30-40 unique items, not exactly 24. More items means each card draws a different subset, so the cards feel meaningfully different — not the same 24 phrases in a different order. A list of 40 items across 25 cards gives you a richer game and the math works out: choose 24 of 40 is over 40 billion possible cards.
