Free AWS and DevOps tools
Pick the one you need. Every tool runs in your browser: nothing you type or paste is saved or sent anywhere.
AWS tools
Built from what I check on client accounts.
AWS savings estimator
Enter your monthly bill, tick the problems you have, and see a rough monthly saving range.
Open toolAWS policy checker
Paste an IAM, S3 bucket or role trust policy and get risky settings explained in plain words.
Open toolVPC CIDR and subnet calculator
Split a VPC range into subnets across availability zones, with the 5 addresses AWS reserves counted.
Open toolDeveloper tools
Quick helpers for YAML, schedules and tokens.
YAML validator and formatter
Validate and format YAML (Kubernetes, GitHub Actions) and convert between YAML and JSON.
Open toolCron expression explainer
Read any cron schedule in plain words and see the next run times. Supports AWS EventBridge.
Open toolCron expression generator
Pick a schedule in your time zone and get the cron line for crontab, GitHub Actions, AWS and Kubernetes.
Open toolBase64 and JWT decoder
Encode and decode Base64, and read what a JWT says (header, claims, expiry).
Open toolWant the real numbers for your AWS account?
Send me your setup and I will return a written list of savings and security fixes, safest first. It is free.