UNAUTHORIZED ACCESS DETECTED
This is a fake "system breached" / "access denied" lock screen that runs entirely in your browser. It looks alarming — a glitching headline, a CRT scanline overlay, a scrolling intrusion log, and an optional self-destruct countdown — but it is purely a pre-scripted visual prop. Nothing is hacked, scanned, locked, or encrypted, and no data ever leaves your browser. Every line in the "intrusion log" is randomly generated theater.
Pick a headline from the dropdown — SYSTEM BREACHED, ACCESS DENIED, SYSTEM LOCKED, SECURITY ALERT — or write your own custom headline and subline. Choose one of four alert colors (red, green, amber, or cyan), then decide whether to show the countdown timer and the intrusion log. Hit ACTIVATE to launch the warning screen, and use the FULLSCREEN button for the most convincing effect. Press H at any time to hide or show the control panel, and ESC to stop the simulation and return to the controls.
The breach screen works well as a harmless prank to leave on a friend's or coworker's monitor, as a "hacked computer" prop in films, YouTube videos, and live streams, and as an attention-grabbing visual for cybersecurity awareness demos, escape rooms, ARGs, and themed events. Because everything is local and scripted, it is completely safe to run anywhere.
If you like this one, try our fake hacking terminal, the hacker typer, the classic Matrix digital rain, or a retro boot sequence simulator — all free, all running right in your browser.