Think. Type. See. Communicate.

Apple silicon Mac (M1 or later), macOS 12 or newer. There is no Intel, Windows or Linux build — the editor in your browser runs on all of them.

You own your files, full stop.
Plain .dgmo text on your disk, in your folders, under your control. No cloud, no account.
Type a line, see the diagram. Instantly.
A real native macOS app — launches in under a second, redraws as you type, and click any shape to jump straight to the line that drew it.
Free. Actually free, not freemium-with-an-asterisk.
No trial, no license key, no seat count, no upsell modal. Download it, use it forever, and ship it to your whole team without filing a procurement ticket.
50 chart types for the work you actually do.
Sequence and flowcharts for engineers; org charts, gantt timelines, and kanban boards for managers; sankey, bar, pie, and quadrant for whoever has to make the deck.
Open it from your terminal.
brew install diagrammo/dgmo/dgmo also installs a diagrammo command:diagrammo . opens the current directory, diagrammo foo.dgmo opens a file. See /dev for details.