Bingo Card Generator
Paste one item per line, keep or remove the free center, choose a seed, and create reproducible cards ready for printing.
Cards ready
- Processed items
- Ignored blank lines
- Cards
- Free center
- Seed
Private by design: Your title, items, seed, and cards stay in this browser tab. They are not uploaded, stored, or added to the URL.
Create a custom batch
Enter an optional title such as Team Bingo, then paste one item per line. A free-center card needs at least 24 unique items; a card without the free center needs at least 25. Blank lines are ignored and counted in the receipt. Exact duplicates are refused with bounded source-line details.
The full input is capped at 20,000 UTF-16 code units, each processed item at 60 UTF-16 code units, and the processed list at 200 items. These limits keep generation and printing predictable.
Reproduce the same cards with a seed
The visible default seed is toolneko-bingo-v1. The same exact processed items, title, free-center setting, card count, and seed produce the same ordered layouts with this version of the engine. A changed input retires the previous result and its print authority immediately.
The generator uses SHA-256 through the W3C Web Cryptography API to initialize a deterministic shuffle. The seed controls reproducibility; it is not cryptographic randomness and must not be used for gambling, security, or fair prize selection.
Print the current cards
Each card is a semantic 5×5 table. Print CSS targets US Letter portrait paper with 0.5 inch margins and keeps one complete card on each page. Browser and printer settings can still scale or clip output, so check the print preview and use the matching paper size.
This version does not create hosted games, accounts, invitations, or public links. It does not create PDF files or direct downloads. A browser may independently offer a PDF destination in its print panel.
Private browser-local processing
The tool builds text-only cells in this tab. It does not interpret item markup, upload entries, write them to storage, add them to the URL, or send them in analytics. Analytics uses only fixed action categories for generate, print, clear, and validation errors.
Frequently asked questions
How many items do I need for a bingo card?
Use at least 24 unique nonblank items with the free center enabled, or 25 without it. You can provide up to 200 items; each card draws from the full list.
Can I make the same cards again?
Yes. Keep the same exact title, processed items, free-center choice, card count, and seed. The versioned browser engine will reproduce the same ordered cards.
Are duplicate items allowed?
No. Exact duplicates are refused with their source lines so every non-free cell on a card stays unique.
Does this make a PDF?
No. It creates print-ready HTML cards and opens your browser's print flow. Your browser may offer Save as PDF, but the tool does not create a PDF file.
Are my bingo items uploaded or saved?
No. Titles, items, seeds, and cards remain in the current browser tab and are retired when you leave or restore the page.