Architecture modelling for macOS. A native PlantUML editor with live preview, model-first persistence, and support for eight diagram types. No cloud. No subscriptions. Just a tool that works.
VUML is purpose-built for macOS, delivering a fast, private, and focused modelling experience without compromise.
Write PlantUML syntax in a dedicated code editor with syntax highlighting and real-time diagram preview in a split-pane interface.
See your diagrams render as you type. The preview pane updates automatically, giving you instant visual feedback on every change.
Define architectural elements once in a SQLite-backed model and reference them across multiple views and diagrams using the .vuml format.
A full modal editing engine built into the text editor. Navigate, edit, and compose diagrams with the keyboard efficiency of Vim.
No internet connection required. No telemetry. No data collection. Your architecture models stay on your machine, always.
Built entirely with Swift and SwiftUI. No Electron, no web views, no third-party dependencies. Runs natively on Apple Silicon and Intel.
From high-level enterprise architecture to detailed class diagrams, VUML covers the full spectrum of software and systems modelling.
Pay once, own it forever. Free updates included. Choose the option that suits you best.