Free Tools
Tools for operators.
15 free, no-signup tools for SREs and DevOps engineers. Calculate SLAs, generate cron expressions, decode HTTP status codes, and more.
Monitoring 5
Uptime SLA Calculator
Calculate exact downtime for any SLA percentage
Open →Downtime Cost Calculator
Estimate the cost of downtime per minute
Open →HTTP Status Codes
Searchable reference with fixes
Open →SSL Certificate Checker
Check certificate validity and expiry
Open →Latency Percentile Calculator
Calculate P50, P90, P95, P99 from data
Open →Kubernetes 5
K8s Cost Estimator
Estimate monthly cluster costs
Open →Container Size Calculator
Right-size CPU and memory limits
Open →Error Budget Calculator
Calculate SLO error budget burn rate
Open →NAT Gateway Cost Calculator
Calculate AWS NAT Gateway costs per hour and per GB
Open →EKS Pricing Calculator
Estimate AWS EKS cluster costs with EC2 or Fargate
Open →DevOps 5
Beyond Tools
Want continuous monitoring?
These tools help you calculate and understand. Warden helps you monitor and alert — automatically, 24/7, with 10-second checks.
Join the waitlist →