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 v1.0.14 - 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. v1.0.12 - July 29, 2026 - Advanced Class diagram routing with turn-penalty optimization and quadrant-aware collision avoidance. - Implemented automatic inheritance hierarchy detection to prioritize vertical parent-child placement. - Added support for perfectly straight relationships between aligned classes and optimized margin attachment sorting. - Refined diagonal routing logic to favor clean 1-turn L-shapes and prevent edge-sliding lines. v1.0.11 - July 26, 2026 - Enhanced Class diagram layout with smart relationship routing and improved note connectivity for better readability. - Implemented intelligent label positioning for relationship arrows to automatically prevent overlap with attached notes. - Improved SVG rendering robustness by centralizing filter ID management and expanding diagram bounds to prevent clipping. - Refined Activity diagram layout with dynamic swimlane scaling and optimized decision branch logic. v1.0.10 - July 25, 2026 - Added new WBS charts with easy numbered lists and icons. - Add lines or titles to tasks and change how they look. - Fixed empty gaps so your work looks the same on any screen. v1.0.9 - July 22, 2026 - Added `extends` and `implements` keywords for automatic generation of inheritance and realization relationships. - Implemented individual class and relation overrides for colors, line styles (bold, dashed, dotted), and multi-directional gradients. - Enhanced the syntax toolbar with dedicated buttons for rapid class and timing diagram construction. 🚀 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.