Free DevOps Tools

Calculate allowed downtime for any SLA availability target from 99% to 99.999%.

Build and validate cron expressions visually with human-readable descriptions.

Plan server storage with growth projections and retention policies.

Calculate Mean Time To Recovery and compare against industry benchmarks.

Calculate network address, host range, and usable hosts from any CIDR notation.

Enter your load average and CPU cores to get a plain English explanation.

How much CPU, RAM and disk does your workload need? Pick a workload, describe its shape, get a minimal and a comfortable spec.

Compare what a month of egress costs on AWS, Google Cloud, Azure, Hetzner, DigitalOcean, Linode, OVHcloud and Cloudflare R2, with the tier breakdown.

Usable capacity, parity overhead, fault tolerance and rebuild risk for RAID 0, 1, 5, 6, 10, 50 and 60.

Find unpatched CVEs in your installed Linux packages. Paste your package list, get a CVE report sorted by severity.

Paste one line of `uname -a` and see the CVEs against the kernel your server is actually booting, plus how old it is.

Scan any public Docker image for CVEs. Type an image name, we pull the manifest, read its package database, and report what's unpatched.