--- title: "System Architecture Diagram Designer" description: "Design and visualize software system architectures with drag-and-drop components. Create diagrams with servers, databases, APIs, message queues, containers, and more. Compare old vs new architecture versions side by side. Better than Excalidraw for software architecture." url: https://findutils.com/developers/architecture-diagram/ category: developers --- # System Architecture Diagram Designer Design and visualize software system architectures with drag-and-drop components. Create diagrams with servers, databases, APIs, message queues, containers, and more. Compare old vs new architecture versions side by side. Better than Excalidraw for software architecture. **Use this tool:** [System Architecture Diagram Designer](https://findutils.com/developers/architecture-diagram/) ## Programmatic access - Browser-only: this tool works on a file, the DOM, or a browser API and has no REST or MCP id. ## Why Use This Architecture Diagram Designer? Designing software architecture is critical for building scalable, maintainable systems. This tool lets you visually design your entire system architecture using drag-and-drop components representing real-world infrastructure: servers (Node.js, Python, Java, Go, etc.), databases (PostgreSQL, MySQL, MongoDB, DynamoDB), caches (Redis, Memcached), message queues (Kafka, RabbitMQ, SQS), CDNs, load balancers, API gateways, containers (Kubernetes, Docker), serverless functions, and more. Unlike general-purpose diagramming tools like Excalidraw or draw.io, this tool is purpose-built for software architecture. Each component is color-coded by type, shows relevant metadata (ports, technology badges, health status), and connections can be labeled with protocol types (HTTP, gRPC, SQL, WebSocket, Events) to clearly communicate data flow. The version comparison feature lets you tag components as OLD or NEW to show architectural evolution — perfect for design reviews, migration planning, and documenting system changes over time. Start from preset templates (3-tier, microservices, event-driven, serverless, CQRS) or build from scratch. Export as PNG or JSON for documentation and sharing. ## Tips for Better Architecture Diagrams - Use Auto Layout to organize messy diagrams automatically, then fine-tune positions manually for the best visual flow. - Label every connection with its protocol type (HTTP, gRPC, SQL, Events) so readers immediately understand how components communicate. - Group related components close together and use the note component to add context or explain design decisions directly on the canvas. - Take advantage of version tags (NEW/OLD) during design reviews to clearly show what is changing, making it easy for reviewers to focus on the delta. - Start from a preset template that matches your target pattern, then add, remove, or replace components rather than building from an empty canvas. ## Frequently Asked Questions ### What types of components can I add to my diagram? You can add 60+ component types across 6 categories: Compute (servers in Node.js, Python, Java, Go, PHP.NET, Ruby, Rust; microservices, workers, cron jobs, webhooks; Kubernetes, Docker, ECS containers; AWS Lambda, Azure Functions, Cloudflare Workers), Data (PostgreSQL, MySQL, MongoDB, DynamoDB, Cassandra, Elasticsearch; Redis, Memcached caches; Kafka, RabbitMQ, SQS queues; S3, Azure Blob storage), Networking (NGINX, HAProxy, ALB load balancers; Cloudflare, CloudFront CDN; API gateways; firewalls), Infrastructure (Prometheus, Grafana, Datadog monitoring; Auth0, Keycloak, Okta auth), Clients (browser, mobile, desktop, IoT), and grouping/annotation nodes. ### How do I compare old vs new architecture versions? Select any component and set its Version Tag to NEW or OLD in the properties panel. NEW components show a green badge, OLD ones show a red badge. This makes it easy to visualize what changed between architecture versions during design reviews or migration planning. ### Can I label the connections between components? Yes! Hover over any connection to see a '+ label' button, or click an existing label to edit it. Use labels like HTTP, gRPC, SQL, WebSocket, Events, TCP to clearly communicate the protocol or data flow type between components. ### What preset templates are available? 8 preset templates are included: 3-Tier (classic web app), Microservices (API gateway + independent services), Event-Driven (Kafka producers/consumers), Serverless (Lambda + DynamoDB + S3), Monolith, API Gateway pattern, CQRS (command/query separation), and CDN + Static site. Each preset includes realistic component configurations and labeled connections. ### How do I export or share my diagram? Export as PNG image for documentation, or as JSON to save and re-import later. You can also use the Share Link button to generate a URL that encodes your entire diagram, making it easy to share with teammates without any file attachments. ### Does this architecture diagram tool require a signup? No. The Architecture Diagram Designer is available with no signup, no usage limits, and no watermarks. All processing happens in your browser, so nothing is uploaded to external servers. You can create unlimited diagrams and export them without restrictions. ### Can I use this tool for cloud architecture diagrams? Absolutely. The tool includes components for all major cloud services: AWS (Lambda, S3, DynamoDB, SQS, ECS, ALB), Azure (Functions, Blob Storage), Google Cloud, and Cloudflare Workers. Each component displays technology badges and can be connected with labeled protocols to accurately represent your cloud infrastructure. ### How does this compare to Excalidraw or draw.io for architecture diagrams? Unlike general-purpose diagramming tools, this designer is purpose-built for software architecture. Components are pre-configured with realistic metadata (ports, tech stacks, health status), connections support protocol labels (HTTP, gRPC, WebSocket), and the version comparison feature lets you tag components as OLD or NEW. You also get 8 architecture-specific templates that general tools cannot offer. ### Can I collaborate with my team on architecture diagrams? You can share diagrams with teammates using the Share Link feature, which encodes your entire diagram into a URL. You can also export as JSON and share the file through version control systems like Git. For design reviews, use the version tagging feature to mark components as NEW or OLD so reviewers can instantly see proposed changes. ### What architecture patterns does this tool support? The tool supports all major architecture patterns with dedicated templates: 3-Tier (presentation, logic, data layers), Microservices (API gateway with independent services), Event-Driven (message queues with producers and consumers), Serverless (FaaS with managed services), CQRS (command/query responsibility segregation), Monolith, API Gateway pattern, and CDN + Static site. You can also combine patterns to represent hybrid architectures. ## Related Tools - [ER Diagram Designer](https://findutils.com/developers/er-diagram-designer/) - [State Machine Designer](https://findutils.com/developers/state-machine-designer/) - [Load Balancer Design Tool](https://findutils.com/developers/loadbalancer-design/) - [UML Diagram Editor](https://findutils.com/developers/uml-diagram-editor/) - [GraphQL Schema Validator](https://findutils.com/developers/graphql-schema-validator/) - [API Docs Generator](https://findutils.com/developers/api-docs-generator/) - [OpenAPI Validator](https://findutils.com/developers/openapi-validator/) - [SVG Path Visualizer](https://findutils.com/design/svg-path-visualizer/)