Version 1.0.1

Download Diagon.

One download, everything included — the layout engine, the editor and the offline AI that drafts diagrams from plain words. That AI lives inside the package, which is why it weighs more than your average app. Nothing ever leaves your machine.

30-day free trial starts on first launch — no account, no card · how buying works

Windows

Windows 10/11, 64-bit · 8 GB RAM recommended

Download · ≈ 1.7 GB

Diagon-Setup-1.0.1.exe

Download and run Diagon-Setup-1.0.1.exe.
Windows SmartScreen may warn that the app is new — this build is not yet code-signed. Choose “More info”, then “Run anyway”.
Pick an install folder and finish. Diagon opens from the Start menu or the desktop shortcut.

Linux · AppImage

Any modern 64-bit distro · 8 GB RAM recommended

Download · ≈ 1.7 GB

Diagon-1.0.1.AppImage

Download the AppImage, then make it executable:
chmod +x Diagon-1.0.1.AppImage
Double-click it (or run it from a terminal). No installation, no root.
If it doesn't start on Ubuntu 22.04+, install FUSE once:
sudo apt install libfuse2

Linux · Debian/Ubuntu

Debian 12+ / Ubuntu 22.04+ · 8 GB RAM recommended

Download · ≈ 1.7 GB

diagon_1.0.1_amd64.deb

Download the package, then install it:
sudo apt install ./diagon_1.0.1_amd64.deb
Launch “Diagon” from your application menu.

macOS

In the works — the Apple Silicon build has to be produced on Apple hardware, and it's next in line. Want a note when it lands?

Tell me when it ships

Good to know

Unsigned, on purpose (for now)

The 1.0 installers are not yet code-signed, so Windows shows a SmartScreen notice on first run. Verify your download against the SHA-256 checksums published with the release if you want certainty. Signed builds are planned.

Private by construction

Diagon has no telemetry and the AI runs entirely on your CPU — the app works with the network cable unplugged. Your diagrams are plain-text files that stay wherever you save them. See the licence and privacy notes.