ReRender - PlantUML Renderer

Fast PlantUML renderer for your browser. Create activity, sequence and timing diagrams easily and privately without a server.

If you have any feedback on the extension, we'd greatly appreciate hearing from you. Please share your thoughts at info@chirila.ch. As we're still in the early releases, your feedback is invaluable in helping us identify bugs, improve the experience, and prioritize new features. Thank you for your support! 🔄 LATEST CHANGES v1.0.8 - July 22, 2026 - Enhanced Class Diagrams with support for advanced body separators, labeled groupings, and the `remove` command for pruning. - Implemented comprehensive note support with full Creole markup, allowing annotations on classes, members (A::member), or relationship links. - Introduced powerful display parameters for hiding members and visibility levels, alongside an improved layout engine with collision detection. v1.0.7 - July 21, 2026 - Implemented Class Diagram support (Parser, Layout, Painter) with inheritance, composition, aggregation, advanced body separators, and the `remove` command. - Implemented comprehensive note support with full Creole markup, allowing annotations on classes, members (A::member), or relationship links. - Introduced powerful display parameters for hiding members and visibility levels, alongside an improved layout engine with collision detection. v1.0.6 - July 20, 2026 - Added swimlane background colors and convergent path routing to activity diagrams. - Implemented specialized SDL shapes like input, output, and procedure. - Added global skinparam support to customize diagram colors and arrows. - Refined branch alignment and path merging for complex activity structures. - Added support for explicitly hiding participants in sequence diagrams. - Improved label parsing for complex `elseif` branches in activity diagrams. 🚀 WHY RERENDER? - Lightning-fast PlantUML rendering optimized for the web. - Runs entirely in your browser with no server connection required. - Modern, reactive editor with instant live previews. ✨ FEATURES - Live Rendering: Instant visualization of Class, Activity, Sequence, and Timing diagrams. - Modern UI: Clean, responsive interface with multiple themes (Classic, Nature, Matrix, OLED). - Complex Syntax: Full support for swimlanes, nested loops, and advanced flow control (detach/kill). - Private & Secure: All diagram data stays on your machine; no data is sent to a backend. - Pure Logic: Layout calculations performed entirely on the client-side for maximum privacy. 📝 DESCRIPTION ReRender is a high-performance, web-optimized PlantUML renderer. Unlike traditional tools that require a Java-based backend or cloud processing, ReRender parses and calculates diagram layouts directly in your browser using a custom local layout engine. It provides a reactive editing experience where users can visualize complex workflows, system interactions, and timing constraints in real-time. Key functionalities include complex activity parsing and a modular architecture that ensures speed, privacy, and reliability. ⚠️ DISCLAIMER ReRender is an independent project and is not affiliated with, sponsored by, or endorsed by the official PlantUML project or its creators. It is a separate implementation of the PlantUML syntax designed for modern web and mobile environments.