Port 80 (HTTP) — What It Is and How to Use It

Port 80 is the standard port for Hypertext Transfer Protocol (HTTP), the foundation of data communication on the World Wide Web. It's used for unencrypted web traffic, allowing browsers to connect to web servers and retrieve website content.

Last updated: 2026-03-02

                Port Number
                80
            

Protocol HTTP

Common Use Cases

Serving web pages and content to users
Redirecting traffic to HTTPS (port 443)
Hosting APIs that do not require encryption

Check if Port 80 is Open

netstat -tulnp | grep :80

netstat -ano | findstr :80

⚠️ Security Note: Because port 80 transmits data in plain text, it's vulnerable to eavesdropping and data manipulation. It is highly recommended to redirect all traffic from port 80 to the secure HTTPS port 443.

Related Ports

Frequently Asked Questions

Is port 80 dangerous to leave open?

While not inherently dangerous if properly configured, leaving port 80 open without redirecting to HTTPS is a security risk. All data transmitted over HTTP is unencrypted, making it susceptible to interception and tampering. It's best practice to redirect all HTTP traffic to HTTPS for secure communication.

What service uses port 80?

The primary service that uses port 80 is HTTP, the protocol used for transferring web pages and other content over the internet. Web servers like Apache, Nginx, and IIS listen on port 80 to handle incoming HTTP requests.