Free Converter
Port Scanner
Check which common web ports are open or accessible on a hostname. Tests HTTP connectivity to ports 80, 443, 8080 and more — no install required.
This scanner tests HTTP/HTTPS connectivity. Raw TCP scanning is not possible from browsers due to security restrictions.
Common Ports Reference
| Port | Service | Description |
|---|---|---|
| 21 | FTP | File Transfer Protocol — uploads/downloads |
| 22 | SSH | Secure Shell — encrypted remote access |
| 25 | SMTP | Simple Mail Transfer Protocol — email sending |
| 53 | DNS | Domain Name System — hostname resolution |
| 80 | HTTP | Hypertext Transfer Protocol — standard web |
| 110 | POP3 | Post Office Protocol 3 — email retrieval |
| 143 | IMAP | Internet Message Access Protocol — email |
| 443 | HTTPS | HTTP Secure — encrypted web traffic |
| 3306 | MySQL | MySQL — relational database |
| 5432 | PostgreSQL | PostgreSQL — relational database |
| 6379 | Redis | Redis — in-memory data store |
| 27017 | MongoDB | MongoDB — NoSQL document database |
| 8080 | HTTP Alt | Alternative HTTP port — dev/proxy |
| 8443 | HTTPS Alt | Alternative HTTPS port — dev/proxy |