LB Designer

BetaThis tool is in beta. Some features may change or have limited functionality.
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Visually design your load balancer architecture and generate ready-to-use configuration files for Nginx, HAProxy, Caddy, and F5 BIG-IP. Drag-and-drop nodes, connect services, and build complete system architecture diagrams with AI/ML support.
Components
Load Balancers
NGINX
HAProxy
Caddy
Envoy
Traefik
AWS ALB
AWS NLB
F5 BIG-IP
Apache (mod_proxy)
Citrix ADC
Azure Load Balancer
Azure App Gateway
GCP Load Balancer
CDN
Cloudflare CDN
AWS CloudFront
Fastly
CDN
DNS
Route 53
Cloudflare DNS
DNS
Firewall / WAF
AWS WAF
Cloudflare WAF
Firewall
API Gateway
Kong
AWS API Gateway
API Gateway
Service Mesh
Istio
Linkerd
Consul Connect
Service Mesh
Auth / Identity
Auth0
Keycloak
Okta
Auth Provider

Why Use This Load Balancer Design Tool?

Designing a load balancer architecture is a critical step in building scalable, fault-tolerant systems. This visual tool lets you drag and drop components, connect services, and generate production-ready configuration files — all from your browser.

Whether you're building a simple HTTP setup or a complex microservices architecture with CDN, WAF, API gateways, and database clusters, this tool helps you visualize and validate your design before deploying. It generates configurations for NGINX, HAProxy, and Caddy, plus Docker Compose and Terraform templates.

Key Features

  • Visual Canvas — Drag-and-drop nodes for load balancers, servers, databases, caches, CDNs, and more.
  • 20 Architecture Presets — Start from battle-tested templates: microservices, Kubernetes, zero trust, GraphQL federation, and more.
  • Real-Time Validation — Get warnings for single points of failure, missing health checks, and no SSL.
  • Config Generation — Export NGINX, HAProxy, Caddy, Docker Compose, and Terraform configs.
  • Cost Estimation — See estimated monthly costs for each component in your architecture.
  • Technology Tooltips — Learn about each technology's strengths, weaknesses, and best use cases.

Frequently Asked Questions

What is a load balancer and why do I need one?
A load balancer distributes incoming network traffic across multiple servers. It ensures high availability and reliability by sending requests only to healthy servers. You need one when your application receives more traffic than a single server can handle, or when you need zero-downtime deployments.
Which load balancer should I choose — NGINX, HAProxy, or Caddy?
NGINX is the most popular choice for HTTP load balancing with excellent performance and a huge community. HAProxy is preferred for high-performance TCP/HTTP load balancing with advanced health checks. Caddy is great for simple setups with automatic HTTPS certificate management. For AWS environments, consider ALB or NLB for fully managed solutions.
What load balancing algorithm should I use?
Round Robin works well for most cases with equally capable servers. Use Least Connections when servers have varying capacity or request processing times. Use IP Hash when you need session persistence without cookies. Weighted Round Robin lets you route more traffic to stronger servers.
How do I use the architecture canvas?
Drag components from the left palette onto the canvas. Connect nodes by dragging from one node's handle to another. Click any node to edit its properties in the right panel. Select a preset to load pre-built architectures, or build your own from scratch. Use the bottom bar to validate your design, estimate costs, and export configurations.
Can I export my architecture design?
Yes! You can export your design in multiple formats: JSON (to save and reimport later), Docker Compose (docker-compose.yml), Terraform (main.tf for AWS infrastructure), and PNG image. You can also share your design via a link that encodes the full diagram state in the URL.