Download Diagramon
Two packages for Windows 10 / 11 (x64), identical in features and both fully offline. No Node.js, no .NET — the WebView2 runtime your system already ships is enough.
Installer
RecommendedDiagramon_3.13.1_x64-setup.exe
Guided setup, and the app checks for updates on its own afterwards (the update package is this same installer).
Download China mirror (Gitee)Portable zip (nothing to install)
Diagramon-3.13.1-win-x64.zip
Unzip it anywhere and run diagramon.exe; uninstalling means deleting the folder.
DownloadSystem requirements
Windows 10 / 11 (x64). WebView2 runtime: already present on Windows 11 and on Windows 10 with Edge, and the installer fetches it if it is missing. Cloud accounts and AI features need a network; everything else works offline.
Updates and verification
The installer's own update check reads the very release this page links to. Every installer ships with a .sig signature and a latest.json manifest, and the updater verifies the signature before it installs anything.
Every release
Each past version, with its release notes and download links, is on the changelog page, newest first.