Port Scanner (Online)
Browsers cannot perform raw TCP scans. Use Nmap / a server-side scanner.
About this tool
Port Scanner (Online) is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Developer Tools — Advanced. Browse more Developer Tools — Advanced tools.