Free Architecture Diagram Maker Online — Zones, Icons, Templates
Draw system architecture diagrams with canvas-drawn icons, grouping zones, typed connections, preset templates, undo/redo, and zoom/pan — all in your browser.
Select: drag · Connect: click source→target · Zone: drag to draw · Double-click: edit label · Scroll: zoom · Space+drag: pan · Ctrl+Z: undo
How it works
Add components
Click any component button or start from a preset template (3-Tier, Microservices, Serverless). Drag to reposition.
Group into zones
Click + Zone, then drag to draw a labeled zone rectangle (VPC, Subnet, Region). Zones appear behind components.
Connect components
Choose a connection type (Sync, Async, Bidirectional), click source then target. Labels appear on the line.
Export
Click Download PNG for a clean white-background export. Ctrl+Z to undo any step.
Common use cases
Cloud architecture docs
Map microservices, databases, queues, and CDNs with labeled zones for VPCs, subnets, and regions.
System onboarding
Create clear architecture diagrams to help new engineers understand how services interact.
RFC proposals
Accompany technical proposals with an architecture diagram to communicate the design visually.
Cloud migration planning
Visualise target state architectures for AWS, GCP, or Azure migration projects.
Frequently asked questions
What component types are available?
Service, Database, Queue, Client, Cloud, CDN, Load Balancer, Storage, Cache, Lambda/Function, Event Bus, Browser, Mobile, Worker, Container/Pod — 15 types with consistent canvas-drawn icons.
What are zones?
Zones are labeled dashed-border rectangles drawn behind components to represent VPCs, subnets, regions, or clusters. Click + Zone, then drag on the canvas to draw one.
What connection types are there?
Sync (solid arrow), Async (dashed arrow), and Bidirectional (double-headed). Each has a different visual style.
Are there preset templates?
Yes — 3-Tier Web App, Microservices, and Serverless starter diagrams. Click a template button to load it instantly.
Can I label connections?
Yes — connection labels are set when you draw them (you see a prompt) and displayed inline on the arrow.
Can I undo?
Yes — Ctrl+Z / Ctrl+Shift+Z for undo/redo. Up to 50 history steps.