System Design Simulator
Sandbox
Build a system from boxes, connect them, and send traffic through it.
Start from launch day
Start empty
+ Users
+ Load balancer
+ App server
+ Session store
+ Cache
+ Database primary
+ Read replica
React Flow
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.