Create UML Diagrams
at the Speed of Thought

Turn text into beautiful sequence, class, use case, and flow charts instantly. No drag-and-drop hassle. Just type, and watch your diagram come to life in real-time.

Now Available on macOS

SparkChart Pro for Mac

Create beautiful sequence diagrams with our native macOS app. Enjoy a seamless, blazing-fast experience with full offline support and native file management. Supports both PlantUML and Mermaid syntax.

Lightning-fast native performance
Full offline diagram creation
Native macOS file management
Dark mode that matches your system
PlantUML & Mermaid syntax support
Download for macOS

macOS 11.0 or later • Free download

Everything you need

Powerful features designed for developers and architects who value speed and clarity.

Real-time Preview

See your changes instantly as you type. No waiting for renders.

Multiple Diagram Types

Create sequence, class, use case, and flow charts with simple, intuitive syntax.

Easy Sharing

Share your diagrams with a simple link or export to multiple formats.

Dark Mode

Beautiful dark mode support for late-night coding sessions.

Export Options

Export to SVG, PNG, or PDF for high-quality documentation.

Secure & Private

Your diagrams are processed locally in your browser for maximum privacy.