Network & DevOps

22 free network & devops tools in the Developer Tools collection — every one runs in your browser with no signup and no uploads.

Translate any cron expression into plain English — and build your own.

nginx exact, prefix, regex and longest-prefix location match priority rules.

All CSP violation report JSON fields with Report-To and Reporting API context.

curl --http1.0, --http1.1, --http2, --http3 flags with ALPN and protocol notes

Parse BIND-format DNS zone files and display records as a structured table.

Look up DNS RCODE values with meaning and common diagnostic context.

Build and push a Docker image to Docker Hub or GHCR on every push

Paste raw HTTP headers and get a security and caching score with fixes.

Paste response headers and get an A-F security grade with remediation advice.

Find any major airport by its 3-letter IATA code instantly

Look up 4-letter ICAO codes for airports worldwide

Enter a CIDR and get network address, broadcast, host range, and usable IPs

Expand :: compressed IPv6 to full form and compress it back

validatingwebhookconfiguration and mutatingwebhookconfiguration fields reference.

All Kubernetes API resource types with shortnames, API group and scope.

Pod, Node, Deployment and PVC condition types with meaning and fix hints.

Search well-known, registered and dynamic ports by number or service.

Break a browser User-Agent string into browser, engine, OS and device.

Decode a MAC address — vendor OUI, unicast/multicast and local/universal.

Understand DNS record types and parse any zone-file line.

Expand a compressed IPv6 address to its full 8-group form.

Break a URL into protocol, host, port, path, query and hash.