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We tested 8 AI diagram generators that create UML, flowcharts, ERDs, and architecture diagrams from code. Only one executes code in a sandbox for runtime-accurate diagrams.
AI can now generate UML class diagrams, flowcharts, ERDs, and architecture diagrams from your code in under 60 seconds. We break down the three approaches — diagrams-as-code, sandbox execution, and direct image generation — and show which actually produces accurate, production-ready diagrams. 90+ languages supported.