Show HN: GraphFlow – system design diagrams that run in the browser

GraphFlow is a browser-based distributed systems modeler with a live simulation. Draw services, queues, caches and databases, then send simulated traffic through them and watch utilization, p95/p99 latency, backpressure, circuit breakers and failures happen in real time. No install and no sign-in needed to try it. What you can do Model an architecture and stress it with a load slider and per-node fault injection. Import docker-compose.yml, Terraform, draw.io, Excalidraw and Mermaid diagrams. Export Mermaid, SVG/PNG, Terraform, Kubernetes manifests and k6 load-test scripts (some exports are Pro). Try a live example Stripe-style webhook and double-entry ledger Edge streaming under chaos CQRS with a Kafka outbox Source: github.com/Hanubaki/GraphFlow (PolyForm Noncommercial 1.0.0, source-available).