SourceCanvas

SourceCanvas is a local editor for SVG, Mermaid, Graphviz DOT, and PlantUML diagrams on iPhone, iPad, Mac, and Apple Vision Pro. Start free • Create, edit, and preview SVG diagrams. • Open, edit, and save source files in all four formats. Your documents remain accessible without a purchase. • Try each non-SVG renderer once for 10 continuous minutes per device. Its timer starts after the first successful render. Lifetime Pro • Unlock explicit SVG, PNG 1×/2×/3×, and vector PDF exports. • Use nonblank templates and full Mermaid, Graphviz, and PlantUML previews after each trial. • On Mac, use the MCP Agent and native AI Preview with compatible local AI hosts. Lifetime Pro is a one-time in-app purchase, not a subscription. Customers who obtained the paid app before the free transition automatically keep equivalent Legacy Pro access. Purchase directly on iPhone, iPad, Mac, or Apple Vision Pro. Restore on another device with the same Apple Account. Rendering runs locally. No account or remote rendering service is required. External SVG resources are blocked unless you choose to allow them.