Remote display control
Blackscreen is a desktop client for operators who need to lock down a workstation display, input, and messaging — quietly, from a single panel.
Every capability in the client, shown as it appears on the workstation.
A borderless, always-on-top layer covers every connected display. No window chrome, no taskbar bleed-through — a clean black field across the full desktop.
Block input at the operating system level while the screen is active. Operators toggle keyboard and pointer independently from the device dashboard.
Push a titled message over the black screen — instructions, warnings, or hold notices — without lifting the overlay or unlocking input.
Your backend sends commands over HTTPS to change device state — black screen, input lock, and messages — without touching the machine directly.
Operators sign in through the client. Tokens are stored in the OS keychain — never written to disk in plain text — with automatic refresh and logout on failure.
Managed machines stay ready. Launch on boot, check for updates on startup, and install new versions without interrupting the operator workflow.
Environments where the display must be controlled, not just observed.
Blank auxiliary displays during sensitive briefings while keeping the operator station under central command.
Lock candidate screens between sessions, push instructions, and block input without physically attending each desk.
Take a shared machine offline visually during maintenance or content rotation — input blocked, screen dark.
Guide a user through a fix while their screen shows only what you want them to see.
Pause a class uniformly — one command, every monitor, every keyboard — then resume when ready.
Reduce shoulder-surfing and unauthorised interaction on workstations handling restricted material.
Per-seat licensing for teams that manage remote displays. Volume discounts available.
Starter
$9/seat/mo
Up to 25 managed devices
Team
$6/seat/mo
26–250 managed devices
Enterprise
Custom
250+ devices or on-premise
Or write to sales@shadowgrow.com
Install the desktop client on the machine you intend to manage.
Download the ZIP, extract, then run Blackscreen.exe. If Chrome blocks the direct .exe, use the ZIP instead.
Apple Silicon build. If macOS says the app is “damaged”, open Terminal and run:
xattr -cr "/Applications/Black Screen Controller.app"
Or right-click the app → Open → Open again.
Download .dmg