Practice cloud architecture
without the risk.
Run real AWS CLI commands, build VPCs, and test IAM policies — in a free sandbox, no cloud account needed.
Everything you need to learn cloud infrastructure
IAM Policy Simulator
Test permissions with step-by-step explanations. See exactly why access is allowed or denied.
VPC & Networking
Build VPCs with public/private subnets, security groups, and route tables. Validate reachability.
Resource Graph
Visualize your entire infrastructure as an interactive graph. Understand relationships at a glance.
Event Simulation
Watch events flow through EventBridge rules to SQS/SNS targets in real time.
Compute & Containers
Simulate EC2 instances, Auto Scaling Groups, and ECS Fargate services.
Audit & Observability
CloudTrail-like audit logs and CloudWatch-like metrics for every action in your sandbox.
How it works
Sign up
Create your account and get instant access to your own isolated sandbox environment.
Run real AWS CLI commands
Use Cloud Shell to create IAM users, VPCs, S3 buckets, and more — the exact same commands you'd run against a real account. The Policy Simulator explains every allow and deny.
Validate and learn
Use the Reachability Checker, Event Timeline, and Resource Graph to verify your designs and understand how services interact.
See it in action
Step-by-step guides for common AWS patterns. No account needed to follow along.
IAM: users, groups & permissions
Create users, attach policies, and test access with the Policy Simulator.
S3: buckets, objects & the AWS CLI
Create buckets, upload objects, and manage data using aws s3 commands.
Lambda: functions & triggers
Write handler code, invoke it with a JSON payload, and wire an SQS event source.
API Gateway: REST APIs & authorizers
Build a REST API with Lambda, deploy stages, and protect it with API keys.
Ready to practice cloud architecture?
Start your 7-day free trial. No cloud account needed.
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