Overview

Mainframe turns a pile of remote machines into a single wall you can watch at a glance. Add your PCs, servers, and VPSes and they appear as live RDP viewports in a grid you can size from 2×2 all the way to 6×6. The wall is view-only so nothing gets touched by accident; expand any tile for full control, go true-fullscreen, or yank a single screen out into its own free-floating desktop window and place it wherever you like.

A This-PC panel shows your own machine's address, name, and username so you always know exactly what to connect to, and a toast pops the moment any connection drops. Connections are saved with passwords encrypted by Windows DPAPI and reconnect on launch. It runs from the system tray and updates itself silently. Free to use — claim your license key and download it straight from this page.

• Live RDP wall, 2×2 up to 6×6, view-only by default
• Expand for full control, true-fullscreen, or pop out to a floating window
• This-PC panel + drop alerts so you're never guessing
• Saved connections (DPAPI-encrypted), tray, silent auto-updates

Add your first connection

Click any empty tile (or ☰ Mainframe → Add a connection) and enter the target's host or IP, your username, and password. Mainframe connects and the tile becomes a live view-only viewport. Add as many as you like — grow the grid from 2×2 up to 6×6 in Settings → General. Connections are saved (passwords encrypted with Windows DPAPI) and reconnect automatically next launch. The target PC must have Remote Desktop turned on (Windows Settings → System → Remote Desktop).

Control, fullscreen & pop-out

The wall is view-only so nothing gets touched by accident. Click the ⛶ button on a tile (or double-click its name) to expand it for full control, then ⛶ Fullscreen to fill the whole screen (Esc exits). Prefer it on a second monitor? Hit ▣ Pop out to float that viewport in its own movable, resizable desktop window — the grid keeps its place with a placeholder until you return it. Right-click any tile to reconnect, edit, pop out, or remove it.

Find this PC & watch for drops

Settings → This PC lists this machine's address, computer name, all IPv4 addresses, and username with copy buttons — exactly what to type on another computer to reach it. The Connections tab is a live dashboard of every slot and its status, and if any connection drops you'll get an on-screen toast naming it so you can reconnect. Mainframe runs from the system tray and updates itself silently.

Install & activate

Download Mainframe above (or from your account), run the installer, and launch it. On first run, paste your license key from your account to activate — it binds to this computer. The full account, key, and install walkthrough is in the getting-started guide.

Need a hand?

Check the troubleshooting tips, browse the FAQ, or reach us from the contact page — we read everything.

See also

Head to the Mainframe product page to download it, or read the guides for our other free tools:

• CLI Assistant docs — Desktop companion for your AI coding CLIs
• CarbonCopy docs — Real-time folder backup for Windows
• Master Keybind Chart docs — Every shortcut, one place
• Synthasize Me docs — Browser-free music sequencer & synth
• AdGenie docs — Design studio for content creators
• Turnstyle docs — DJ turntables for your desktop
• Immersion docs — Audio-reactive OBS overlays for streamers
• Clip Lab docs — Cut clips out of long recordings, instantly
• Easy NVidia Updater docs — NVIDIA drivers, always up to date — quietly
• Kernel docs — A fast, GPU-accelerated Windows terminal