75-ball bingo

75-Ball Bingo Marker

Dab your classic 5x5 B-I-N-G-O card (with free center) from your phone or laptop. Saves progress locally and shows a checksum with timestamps.

Use caller

Your live card

Generated 1/27/2026, 6:03:55 PM

Card ID: 608fa4db-42a3-456e-9dc0-b7ac3c73f64b

Integrity: verified

Checksum fc2ef948

FREE free

New card ready to play.

Marked numbers

0 / 24

Nothing marked yet. Tap a square or type a number.

Saved state & integrity

Everything lives in your browser: card numbers, marks, timestamps, and a checksum. If the checksum ever disagrees with the saved data, we flag it here—handy for keeping play honest without a backend.

Created: 1/27/2026, 6:03:55 PM
Last saved: 1/27/2026, 6:03:55 PM
Checksum: fc2ef948
Snapshot: 608fa4db • 1/27/2026, 6:03:55 PM • checksum fc2ef948

Bring your own numbers

Enter 24 unique numbers between 1 and 75. The center is free and handled for you.

We validate uniqueness & range 1–75.

How the integrity badge works

Every card stores a timestamp, card ID, your marks, and a checksum in local storage.
The checksum is recalculated on load; if it doesn’t match, we flag it so everyone knows to reset.
No account or server required—perfect for honor-system games where you still want a paper trail.
Need to switch devices? Copy the snapshot text and paste it into a note for reference.