Search standard TCP & UDP ports, RFC protocol specs, service names, and security risks.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Type a port number (e.g. 5432) or service name (e.g. SSH, Redis, MySQL).
Filter by Web, Database, Mail, Network, or Remote Access.
Review RFC specifications and firewall exposure guidelines.
No, Utilifi includes a complete offline database of standard IANA and well-known ports.
Well-known ports range from 0 to 1023 and are assigned by IANA for core Internet services like HTTP (80) and SSH (22).
Zero-egress companion tools in the Developer Tools suite
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Convert legacy TypeScript numeric/string enums into modern, bundle-friendly string union types.
