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 v1.0.28 - October 26, 2026 - Added native rendering and toolbar support for Mermaid diagrams across Sequence, Class, Mindmap, Use Case, Gantt, and State types. - Enhanced state diagrams with left-to-right layout direction, directional arrow routing, and inline styling support. v1.0.27 - October 18, 2026 - Added caption support and improved layout routing for Sequence and Use Case diagrams. - Added hollow actor styles and enhanced editor features like bracket auto-closing and indentation. - Fixed worker module paths and updated external project distribution targets. v1.0.26 - October 15, 2026 - Introduced a modular pipeline and scene graph architecture with support for advanced styling, skinparams, and interactive tools. - Unified theme token support across all 12 diagram types, fixing colors for relationships, notes, partitions, fork lines, and JSON values. v1.0.25 - October 12, 2026 - Added full support for Component diagrams, along with monthly, quarterly, and yearly timescales for Gantt charts. - Enhanced Gantt week numbering and weekly resource load aggregation, while improving note layouts across state and use case diagrams. 🚀 WHY RERENDER? - Lightning-fast PlantUML & Mermaid 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 supporting most PlantUML & Mermaid 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 & Mermaid 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 Mermaid project or its creators. It is a separate implementation of the PlantUML & Mermaid syntax designed for modern web and mobile environments.