Why did you build this? "We built this because creating and sharing UML diagrams shouldn't be complicated or expensive." Most existing UML tools are either desktop-heavy, require expensive licenses, or lack real-time collaboration features. Developers and architects needed a modern, web-based solution that combines the power of PlantUML with the convenience of real-time editing, instant sharing, and professional presentation modes. We wanted to democratize diagram creation - making it accessible to everyone from solo developers to enterprise teams. What's new and unique about your launch compared to alternatives? Revolutionary Features That Set Us Apart: Dual-Mode Sharing System: Unlike competitors, we offer both "Full Editor" links (recipients can edit code) and "Preview-Only" links (clean presentation mode) - perfect for different collaboration scenarios. Advanced Import Capabilities: First PlantUML editor with native support for importing from encoded PlantUML URLs - copy any PlantUML link from anywhere and paste it directly into our editor. Professional Viewing Modes: Full-screen presentation mode for meetings Distraction-free viewer mode Embed-friendly preview system Intelligent Editor Features: Monaco-powered editor with PlantUML-specific autocomplete Real-time syntax validation with detailed error messages Code folding and advanced find/replace Comprehensive Template Library: Pre-built professional templates covering all major diagram types (sequence, class, use case, activity, component, state, network, ER diagrams). Version History & Collaboration: Built-in revision tracking with restore capabilities and permission-based sharing. Zero-Setup Experience: Works instantly in any browser - no downloads, no installations, no account required for basic use. What are you most proud of in this launch? "We're most proud of solving the 'PlantUML URL encoding mystery' and creating the most user-friendly PlantUML experience available." Technical Achievement: We cracked PlantUML's complex 3-step encoding algorithm (UTF-8 → Deflate → Custom Base64), enabling seamless import from any PlantUML source. This was a significant technical challenge that no other web editor had solved completely. User Experience Innovation: We transformed a traditionally developer-only tool into something accessible to business analysts, product managers, and technical writers. The combination of our help panel, template library, and intuitive interface makes UML creation approachable for non-technical users. Enterprise-Ready Features: Built authentication, collaboration, and sharing features that make this suitable for professional teams while keeping the core functionality free and accessible. Community Impact: We've created a tool that bridges the gap between technical accuracy and visual presentation - developers can create precise diagrams while stakeholders can easily view and understand them. Give us your feedback, comments & also share valuable feature requests if any!

PlantUML Web Editor

Create, collaborate, and share UML diagrams

Create, collaborate, and share UML diagrams