Three-Tier Web Application Architecture Diagram
Show presentation, application and data tiers with load balancer and database layers.
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What's in this template
7 connected components you can rename, recolor, and extend with AI.
A three-tier web application architecture diagram separates a system into a presentation tier, an application tier and a data tier. The presentation tier is the browser-facing frontend, the application tier holds business logic on web and app servers behind a load balancer, and the data tier stores persistent state in a database, often with caching and read replicas. Clear boundaries between tiers make the system easier to scale and secure.
Full-stack developers, architects and students use this diagram to document classic web apps and plan deployments. It is a foundational template for explaining separation of concerns, where load balancing fits, and how requests flow from the browser through application servers to the database and back.
Great for
- Web app documentation
- Deployment planning
- Computer science teaching
- Architecture reviews
- Cloud migration design
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Prefer to start from your own content? Describe it in one sentence and Infogiph generates a three-tier web application architecture diagram you can edit and animate. For example:
“Three-Tier Web Application Architecture Diagram showing Browser Frontend, Load Balancer, App Servers, Business Logic, Primary Database and Read Replica”
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How to customize this template
- Open it in the canvas with Use this template.
- Put the component every request passes through, such as the gateway, broker or load balancer, in the center node, since every other node connects to it.
- Write the protocol into the label, for example Orders Service (gRPC) or Billing Events (async), so readers can tell calls from events.
- Swap generic icons for real vendor logos with the icon search, so the diagram matches the stack your team actually runs.
- Mark what you do not operate, such as third-party APIs, the CDN or a managed database, by adding (external) or (managed) to its label.
- Export a PNG or SVG for docs and slides, or a GIF or MP4 to keep the animation.
Frequently asked questions
What is three-tier architecture?+
Three-tier architecture organizes an application into a presentation tier for the UI, an application tier for business logic, and a data tier for storage, each able to scale independently.
What are the three tiers in a web application?+
The presentation tier is the frontend or browser, the application tier runs the server-side business logic, and the data tier is the database and storage layer.
Why use a three-tier architecture?+
Separating tiers improves scalability, security and maintainability because each layer can be developed, deployed and scaled without tightly coupling to the others.
Where does the load balancer fit?+
A load balancer sits in front of the application tier, distributing incoming requests across multiple app servers for higher availability and throughput.
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