Port 443

Q: What is port 443?

Encrypted web traffic (HTTPS / TLS) HTTPS on port 443 is the encrypted counterpart of HTTP, using TLS (Transport Layer Security) to protect communication between browser and server. It is now the default for the web — Google Chrome marks any page without HTTPS as "Not Secure". Let's Encrypt provides free TLS certificates, making HTTPS universally accessible. Port 443 is also used by APIs, webhooks, and mobile applications.

HTTPS

Encrypted web traffic (HTTPS / TLS)

Port

443

Protocol

TCP

Service

HTTPS

Security

Safe

Full name: HTTP Secure (HTTP over TLS/SSL)

What is port 443?

HTTPS on port 443 is the encrypted counterpart of HTTP, using TLS (Transport Layer Security) to protect communication between browser and server. It is now the default for the web — Google Chrome marks any page without HTTPS as "Not Secure". Let's Encrypt provides free TLS certificates, making HTTPS universally accessible. Port 443 is also used by APIs, webhooks, and mobile applications.

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