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 v1.0.18 - September 7, 2026 - Added support for label and goto flow redirection in Activity diagrams. - Implemented timeline-accurate rendering for parallel blocks and fixed styled text positioning. - Added support for association classes in diagram rendering and layout engines. v1.0.17 - September 6, 2026 - Implemented simultaneous and parallel messages (`&` syntax) for Sequence diagrams. - Added comprehensive support for Advanced Style Selectors (`<style>`) and `MaximumWidth` automatic word wrapping in MindMap diagrams. - Added support for slanted and shifted sequence diagram arrows using exact coordinate offsets. - Added full support for Class diagram packages including correct nested layout rendering. v1.0.16 - September 5, 2026 - Added support for state diagram connection pins, entry/exit points, and concurrent sub-state dividers. - Implemented shallow `[H]` and deep `[H*]` history pseudo-states in the layout and rendering engines. - Enhanced Timing diagrams with hidden states (`{-}`) and robust lifeline definition support. - Improved MindMap orientation parsing and added support for generic type parameters in Class diagrams. - Added support for collapsed paths in JSON/YAML diagrams and updated SDL activity parsing logic. v1.0.15 - August 30, 2026 - Enhanced Sequence diagram delay markers with improved centering and dotted lifeline connectors. - Implemented `maxMessageSize` skinparam for automatic word wrapping in arrows and notes. - Improved metadata persistence (headers, footers, titles) across `newpage` breaks. - Added support for `ignore newpage` and refined `partition` group layouts. - Fixed multiple parser issues, including autonumber formatting and skinparam fallthrough bugs. v1.0.14 - August 5, 2026 - Improved how YAML and JSON diagrams are handled for better accuracy. - Updated the text styling to be more consistent across all diagrams. v1.0.13 - August 3, 2026 - Added smooth pinch-to-zoom and panning for all diagrams. - Improved automatic centering and fitting for better visibility on all screens. - New diagram support for JSON and YAML formats. - Fixed complex `if/else` parsing and corrected relationship routing in Activity diagrams. - Improved Class diagram line routing and ensured parity between browser and mobile rendering. - Smoother rendering transitions while typing to prevent flickering. 🚀 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 Sequence, Activity, Timing, Class, MindMap, and WBS 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 architectures, and technical hierarchies in real-time. Key functionalities include advanced WBS modeling, 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.