Revision is a purpose-built web tool designed for creating, sharing, and maintaining system and software architecture diagrams. It emphasizes standardized documentation through a structured model, allowing teams to build, navigate, and update hierarchical design diagrams efficiently. This structure supports the C4 model, enabling users to zoom between abstraction levels and link components across diagrams—making it easier for both technical and non-technical stakeholders to understand complex architectures. Highlighted features include reusable components, live image exports (always up‑to‑date), over 100 included icons, and full support for sharing and access control—all without extra reader licensing costs Revision combines the speed and ease of a general-purpose drawing tool with the structure and reuse features of an enterprise architecture tool.