Random Port Generator
Generate a random port number in the default 1024–65535 range or a custom range, plus well-known ports to avoid — 100% in your browser, no upload
The default range starts at 1024 to skip the privileged ports (0–1023) that need admin rights. These common ports are often already taken:
20FTP (data)21FTP (control)22SSH23Telnet25SMTP53DNS80HTTP110POP3143IMAP443HTTPS445SMB587SMTP (submission)993IMAPS995POP3S1433Microsoft SQL Server1521Oracle Database3000Node / React dev server3001Common dev server alt3306MySQL / MariaDB3389RDP (Remote Desktop)4200Angular dev server5173Vite dev server5432PostgreSQL5672RabbitMQ (AMQP)6379Redis8000HTTP alt / Django dev8080HTTP alt / proxy8443HTTPS alt9000PHP-FPM / SonarQube9200Elasticsearch11211Memcached27017MongoDB🔒 Ports are generated in your browser — nothing is uploaded.
Generate a random port number
Click Generate to get a random port. By default it draws from the 1024–65535 range — the non-privileged ports you can bind without administrator rights — but you can set any custom Min and Max. Each result is one click to copy, and if the number lands on a service default port such as 3306 for MySQL, the tool flags it so you can generate another.
Which port range should you pick?
Ports 0–1023 are the well-known, privileged ports reserved for system services like HTTP (80), HTTPS (443) and SSH (22), and usually need elevated permissions. 1024–49151 are registered ports, and 49152–65535 are the dynamic or ephemeral ports the operating system hands out itself. For a local dev server or test service, a random port in the 1024–65535 range is the safe, conventional choice.
Frequently asked questions
What port range does it use by default?
By default it generates a port between 1024 and 65535. That skips the privileged well-known ports (0–1023) that need administrator rights, so you get a port you can bind to for a dev server or test app. You can override Min and Max to any range you like.
Does a generated port guarantee the port is free on my machine?
No. It picks a random number in your range and runs entirely in your browser, so it cannot see what is actually listening on your computer. If the port is already in use, just generate another — and the built-in list of well-known ports helps you avoid the ones most likely to clash.