Generate random TCP/UDP port numbers from well-known, registered, or dynamic ranges. Useful for network testing, Docker port mapping, and firewall configuration. Everything runs locally in your browser — nothing is uploaded.
Look up service names for TCP/UDP port numbers — well-known (0-1023), registered (1024-49151), and dynamic/private (49152-65535) ranges. Includes 25+ common services.
Generate random IPv4 and IPv6 addresses for network testing, development, and security research. Everything runs locally in your browser — nothing is uploaded.
Generate easy-to-remember passphrases using random word combinations with separators, numbers, and capitalization. More secure than dictionary words, easier to remember than random strings.
Generate random colors in Hex, RGB, or HSL format with visual preview swatches. Perfect for design palettes and testing. Everything runs locally in your browser — nothing is uploaded.
Generate random sentences from a curated word list, useful for placeholder text and content generation. Everything runs locally in your browser — nothing is uploaded.
Random Port Generator lets you generate random TCP/UDP port numbers from well-known, registered, or dynamic ranges. Useful for network testing, Docker port mapping, and firewall configuration. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Generate random TCP/UDP port numbers from well-known, registered, or dynamic ranges. Useful for network testing, Docker port mapping, and firewall configuration. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Configure your settings below — the output generates instantly.
Yes. After the initial page load, Random Port Generator runs entirely on your device with no internet connection needed. All processing is done locally.
Well-known (0-1023), registered (1024-49151), dynamic/private (49152-65535), or any combination of these ranges.
Yes. You can specify ports to exclude (e.g., 80, 443, 3000) to avoid conflicts with commonly used services.
You can generate 1 to 100 random ports in a single batch. Results are displayed as a list you can copy.
No. The tool generates random port numbers, but it cannot check if ports are currently in use on your system. Use a port scanner for that.
Yes. You can generate ports specifically for TCP, UDP, or both protocols.