v1.4.0Release notes

Download Diagon.

One download, the whole app — the editor and the layout engine that draws your diagrams. Diagon has no telemetry and never uploads a diagram. It has no AI of its own; you can connect the assistant you already use, and that connection is off until you switch it on.

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

01Packages

3 builds

Pick your platform

Windows

Windows 10/11, 64-bit

Download · ≈ 100 MB

Diagon-Setup-1.4.0.exe

01Download and run Diagon-Setup-1.4.0.exe.
02The installer is signed by Soverain s.r.o. If SmartScreen still shows a notice while the certificate is new, choose “More info”, then “Run anyway”.
03Pick an install folder and finish. Diagon opens from the Start menu or the desktop shortcut.

Linux · AppImage

Any modern 64-bit distro

Download · ≈ 130 MB

Diagon-1.4.0.AppImage

01Download the AppImage, then make it executable:
```
chmod +x Diagon-1.4.0.AppImage
```
03Double-click it (or run it from a terminal). No installation, no root.
04If it doesn't start on Ubuntu 22.04+, install FUSE once:
```
sudo apt install libfuse2
```

Linux · Debian/Ubuntu

Debian 12+ / Ubuntu 22.04+

Download · ≈ 100 MB

diagon_1.4.0_amd64.deb

01Download the package, then install it:

sudo apt install ./diagon_1.4.0_amd64.deb

03Launch “Diagon” from your application menu.

macOS

Soon

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

02Good to know

2 notes

Good to know

Signed builds

Installers from 1.1.0 on are code-signed by Soverain s.r.o. (Azure Trusted Signing); SmartScreen notices fade as the certificate earns reputation. Verify your download against the SHA-256 checksums published with the release if you want certainty.

Private by default

Diagon has no telemetry and no account, and the editor works with the network cable unplugged. Your diagrams are plain-text files that stay wherever you save them. If you connect an AI assistant, what it reads from your open diagram is sent by that assistant to its own provider, under your agreement with them. See the licence and privacy notes.