AI Diagram Maker (aidiagrammaker.com) is a conversational AI tool in 2026 for developers and architects, turning plain English descriptions, codebases, or attachments into professional software architecture, flowcharts, sequence diagrams, UML, ERDs, network diagrams, and more. Edit via chat like pair programming, auto-layout with D2 code, GitHub integration for repo analysis, export PNG/SVG/code. Fast (seconds vs minutes), diagram-as-code for version control—ideal for devs shipping visuals as fast as code.