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School Alert Broadcaster
Zero-License W3C Web Push Architecture • Standalone Emailable Demonstrator
Standalone Portable HTML
đ
Synth Audio: ON
Control Room
Admin Broadcast Console
Instant Local Link
⥠Instant 1-Click Presets
đ¨ Lockdown
Invacuation drill
đĨ Evacuation
Fire assembly
âī¸ Weather
Early buses
Alert Severity Tier
âšī¸ Information
đ Urgent
đ¨ Emergency
Alert Title (Displays on Lock Screen / Banner)
Broadcast Instructions & Safeguarding Action
Initiate invacuation immediately. Lock all classroom doors, close blinds, stay out of sight, and silence mobile devices.
Authorised Dispatcher
Broadcast to All Classroom Screens
âĄ
đī¸
Recipient Awareness (Seen Receipts)
Awaiting delivery...
Latency: < 250ms • Target: All Windows, macOS, and iPadOS devices
Simulated Receiver Shell
Classroom Hardware Viewport
Dismiss Banner â
đĒ Windows 11
īŖŋ macOS Sequoia
đą iPadOS
đ Active Screen
đ Screen Locked
Self-contained offline demonstrator • Web Audio oscillator synthesis • No internet required