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Ultralab

One self-contained file. No runtime to install, no installer, no account. Put it where you want it and run it.

Latest — 2026-09-01

Ultralab 0.9.0

The shelf becomes a shop window, every page explains itself, and a lab can save what it is.

Windows (x64) · 136 MB Linux (x64) · 128 MB Lab-host scripts · 19 KB

File	Size	SHA-256
Ultralab-0.9.0-win-x64.exe	136 MB	6da15fba3cf6d08161550c926f52ec953adae20336a0836b70fcb45275166aab
Ultralab-0.9.0-linux-x64	128 MB	2497e101a572952c56f2db88037f5432cd602328100b2f0de164890f83c4f805
Ultralab-0.9.0-scripts.zip	19 KB	15e95135dfbe6817cc64b06659e0984e39a9f1eb8f2ea7626204e5e48f3b6825

Check what you downloaded

Every file above has a SHA-256 next to it. You are downloading a program that will run on your own machine with access to your own files, so it is worth the twenty seconds.

Windows

Get-FileHash .\Ultralab.exe -Algorithm SHA256

Compare the hash with the one on this page. They match or you do not run it.

Linux

sha256sum ./Ultralab
chmod +x ./Ultralab

The download has no execute bit; that is normal for a file off the web.

Windows will warn you. Ultralab is not code-signed — a certificate costs more per year than this project has ever cost to run. SmartScreen will say "unrecognised app"; More info → Run anyway is the way past it. If that is not a trade you want to make, check the hash above first, or build it yourself from source.

Which one do I want?

Your situation	Take	Then
A Windows PC, and the containers will run somewhere else (or in WSL)	win-x64	Run it. It opens a window. See Getting started.
A Linux box that will run the containers itself	linux-x64	Copy it to `/opt/ultralab/`, `chmod +x`, run it.
A Linux box with no screen attached	linux-x64	`--provision` to create the first login, then `--serve` for the household page.
Windows, and you want the lab on the same machine	scripts	The WSL setup script builds you a Linux lab host and puts the Linux binary on it.

The lab-host scripts

The scripts archive holds everything that runs beside Ultralab rather than inside it. None of it is required — Ultralab works without any of it — but each one saves an evening:

setup-wsl-lab-host.ps1 — turns a Windows machine into a working Linux lab host: WSL2, systemd, Docker, the binary in /opt/ultralab, provisioned and ready. It asks for a password rather than carrying one, and every step that changes the host fails loudly instead of reporting a green tick it has not earned.
expose-lab.sh and providers/ — an optional front door for the household page, through Cloudflare Tunnel, Tailscale, ngrok, or something you write yourself. Read providers/README.md before you use any of them.
compose.yml — the human-readable template. Ultralab renders its own file with absolute paths; this one is for reading.
ultralab.service, ultralab.desktop — systemd unit and desktop launcher for a Linux host.

Or build it yourself

You need the .NET SDK 10 or newer, and nothing else.

git clone https://github.com/stevepcave68-sudo/ultralab.git
cd ultralab
dotnet test tests/Ultralab.Core.Tests/Ultralab.Core.Tests.csproj
dotnet run --project src/Ultralab.Desktop

The published binaries above are made by tools/release.ps1 in that repository, from the tag matching the version.