Live native library
Search and saved format filters, subfolders, previews and filesystem watching in a focused three-pane interface.
Native on macOS · Local by design
Diagrams that keep up with humans and agents.
Create, edit, remix, version and recover architecture diagrams in one beautiful Mac library. Open files. Live previews. No account or tracking.
9 format familiesMermaid, Graphviz, PlantUML, D2, draw.io, Excalidraw, Visio and more.
7 languagesLanguage and system/light/dark theme controls are built into the welcome experience.
18 agent toolsConflict-safe create, edit, remix, history, Trash, restore, render and validation.
A complete lifecycle
The diagram editor is only half the product.
Diagram Studio handles the work around the canvas: finding, comparing, copying, remixing, recovering and safely collaborating with local agents.
Version and recover
Immutable source checkpoints, one-click restore and recoverable Trash before explicit destruction.
Agent-first, safely
Optional CLI, authenticated REST and MCP surfaces share the same files, lineage, history and Trash.
Open formats
Your diagrams remain ordinary files in a folder you choose. No proprietary cloud library or account lock-in.
Modern previews
Source, preview or split layouts with fit, zoom, visible syntax errors and SVG/PNG export.
Made for Mac
SwiftUI, native document windows, keyboard shortcuts, accessibility metadata and a sandboxed App Store build.
Mermaid · Graphviz · PlantUML · Nomnoml · D2 · draw.io · Excalidraw · Visio · SVG · PNG
Think in systems. Keep every version.
Diagram Studio for macOS is being prepared for the Mac App Store.