techdiagrams. on your desktop
The full editor, offline and local-first. Draw and run architecture
diagrams right on your machine — no login, no cloud, your work saved as
.techdiagram files on disk.
The same editor — nothing left behind
Local-firstEvery diagram lives on your machine. Nothing is uploaded, nothing phones home.
No accountOpen it and draw. No sign-up, no login, no subscription wall in the desktop app.
Real files on diskSave and open
.techdiagram files like any other document — version them, share them, back them up.Works offlineOn a plane, in a secure network, anywhere — the whole editor runs without a connection.
Native menus & shortcutsFile · Open · Save · Export, wired to your OS menu bar and keyboard the way you expect.
FreeThe desktop editor is free to download and use. Cloud sync and AI stay on the web app.
Early builds — a quick note on the first launch
These installers aren't code-signed yet, so your OS may flag an "unidentified developer." On macOS: right-click the app in Applications → Open → Open. On Windows: click More info → Run anyway. You only need to do this once.
Prefer the browser? The full editor also runs at editor.techdiagrams.net — no install needed.