DemoCast

DemoCast: a lightweight presentation mirroring companion.

DemoCast helps presenters create a clean mirror window for browser-based demos, screen sharing, walkthroughs, training sessions, and live presentations. Instead of constantly switching display modes or hunting for the right window during a demo, DemoCast gives you a focused mirror experience designed for presenting. Start a capture, place the mirror where your audience can see it, and use presenter controls like blackout and focus shortcuts to keep the session moving. DemoCast is built for: - Conference speakers - Technical trainers - Consultants - Sales engineers - Microsoft 365 and Power Platform presenters - Anyone who demos software live Current features: - Open a dedicated mirror window - Capture a tab, window, or screen using browser capture controls - Presenter-friendly mirror layout - Blackout overlay for hiding the mirror temporarily - Configurable blackout color - Countdown timer overlay - Keyboard shortcut support - Mirror focus shortcut - Performance presets and monitoring tools - Confidence monitor popout - Lightweight local settings Privacy-first by design: - DemoCast does not collect, sell, or share personal data - DemoCast does not inject scripts into websites - Screen capture is handled by the browser using standard browser permission prompts - Settings are stored in the browser DemoCast is intended to be simple, focused, and easier to use than full broadcast tools when you just need a clean presentation mirror.