# BingoBox

> BingoBox is a browser-based, zero-install interactive bingo caller and custom digital card generator SaaS platform designed for remote corporate teams, K-12 classrooms, and social events.

BingoBox enables event hosts, educators, and team leaders to run synchronized, real-time bingo games without requiring participants to download software or register accounts. Players join instantly by following a web link or scanning a QR code on any modern desktop, tablet, or smartphone browser. The platform supports standard 75-ball American bingo, 90-ball UK bingo, and customizable 3x3, 4x4, and 5x5 word, phrase, and image grids.

## Core Capabilities & Technical Specifications

- **Cryptographic Randomization:** Number drawing and card cell permutation powered by the Web Crypto API (`crypto.getRandomValues`) to ensure mathematically unbiased, duplicate-free distribution across up to 10,000 players.
- **Zero-Download Player Experience:** Fully web-based (HTML5, CSS3, ES6+ WebSockets). Compatible with iOS Safari, Android Chrome, and desktop browsers without native app installations or user account registration.
- **Automated Voice Calling:** Built-in speech synthesis caller engine with adjustable speeds, keyboard hotkeys (`Space` to draw, `Ctrl+Z` to undo, `N` for new game, `F` for fullscreen), and manual board toggle.
- **Real-Time Winner Validation:** Instant server-side verification comparing an individual player's board layout against drawn numbers in under 500ms when "Bingo!" is called.
- **Custom Word & Topic Generation:** Support for custom vocabulary, corporate icebreakers, company trivia, and themed events with flexible free-space placement.
- **Printable Vector PDF Generation:** 1-click PDF export supporting standard US Letter (8.5x11") and A4 paper in 1-up (large print/seniors), 2-up, or 4-up layouts without watermarks.
- **Data Privacy & Compliance:** Zero PII storage for casual players; COPPA and FERPA compliant for educational use; WCAG 2.1 AA accessible.

## Solutions & Platform URLs

- [Interactive Bingo Caller & Online Game Host](https://bingobox.me/): Real-time caller board with live statistics, full-screen projection, and automated audio callouts.
- [Virtual Team Building Bingo](https://bingobox.me/solutions/virtual-team-building-bingo.html): Remote team icebreaker generator optimized for Zoom, Microsoft Teams, Webex, and Google Meet meetings.
- [Classroom Bingo Maker](https://bingobox.me/solutions/classroom-bingo-maker.html): Ad-free educational tool for teachers to practice vocabulary, STEM, and math review with Chromebooks, iPads, or paper handouts.
- [Printable Bingo Cards PDF Generator](https://bingobox.me/generator/printable-bingo-cards-pdf.html): Free printable card creation utility with customizable grid dimensions, randomized card shuffling, and high-resolution PDF download.

## Optional Context & Full Documentation

- [Detailed LLM Documentation & Product Specs](https://bingobox.me/llms-full.txt): Complete feature matrix, schema definitions, use-case breakdown, and platform comparison benchmarks.