PlantUML Renderer
Live PlantUML diagrams
Only for Mac
$1.99
Mac
Draft, preview, and export PlantUML diagrams on your Mac with a built-in snippet library and live rendering as you type.
PlantUML Renderer is a focused macOS editor for the PlantUML diagram language. Write your diagram on the left, see it on the right — instantly.
Whether you're sketching a quick sequence diagram, documenting a class hierarchy, or laying out a network topology, PlantUML Renderer keeps everything you need in one clean three-pane window: a snippet palette, a monospaced source editor, and a live preview that updates as you type.
Features
• Live preview — Diagrams re-render automatically a moment after you stop typing, so the picture stays in sync with the source.
• Built-in snippet library — Dozens of ready-to-use snippets organized by diagram type:
– Scaffolding (titles, headers, footers, themes, skinparams)
– Sequence diagrams (actors, participants, sync/async messages, alt/loop/group blocks, autonumber)
– Class diagrams (classes, interfaces, abstract classes, enums, inheritance, composition, aggregation)
– Use case diagrams (actors, use cases, include/extend, system boundaries)
– Activity diagrams (start/stop, conditionals, loops, fork/join)
– State diagrams (transitions, composite states, choice pseudo-states)
– Network diagrams (nwdiag networks, nodes, multi-homed hosts, routers, clouds)
– Components (components, packages, queues, databases, lollipop interfaces)
• Insert by click or drag — Click a snippet to drop it at the cursor, or drag it directly into the editor at the spot you want.
• Native macOS editor — A real monospaced text view with full undo/redo, find-in-text, and predictable rendering. No surprise autocorrect, no smart quotes mangling your code.
• Export anywhere — Save the rendered diagram as a high-quality PNG or a crisp scalable SVG, or save the raw .puml source for sharing and version control. Filenames are auto-suggested from your diagram's title.
• Helpful errors — When PlantUML can't parse your source, you get the server's diagnostic message and the offending line number — not a silent failure.
Designed for Mac
Built with SwiftUI and AppKit, PlantUML Renderer feels at home on macOS: resizable split panes, native toolbar, system fonts, light and dark mode, and standard keyboard shortcuts throughout.
Who it's for
Software engineers, architects, technical writers, students, and anyone who wants to capture an idea as a diagram quickly — without launching a heavyweight tool or wrestling with a browser-based renderer.
Note: Diagrams are rendered by the public PlantUML server at plantuml.com, so an internet connection is required.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Greg Boratyn, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Greg Boratyn
- Size
- 420.9 KB
- Category
- Developer Tools
- Compatibility
Requires macOS 26.5 or later.
- Mac
Requires macOS 26.5 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Greg Boratyn
