Scan for Open Ports on Any Website with NetCat

Simply leverage our port checker, designed to identify open and closed ports. It combines traditional TCP and UDP scanning techniques to ensure 100% accurate results. This helps you understand your network's connectivity status and flag potential vuln

Scan and discover open TCP and UDP ports with accuracy and speed. Choose between fast top-port scans or deep, full-range analysis, and get results you can trust: validated, exportable, and ready for follow-up vulnerability assessments. Port Scanner with N

Test and verify servers, firewalls and network perimeters with Nmap Online providing the most accurate port status of a systems Internet footprint. The Port.Tools works well on both desktop and mobile browser.

Advanced Port Scanner 是一款免費的網路掃描程式，可讓您快速尋找網路電腦上的開放連接埠，並檢索在偵測到的連接埠上執行的程式版本此程式具有方便使用的介面和豐富的功能。

端口掃描器乃一項免費實用工具，能便利地協助您偵測設備上的開放端口。 該工具能自動識別您的IP地址，並檢視您設備上開放且未受保護的端口，這些端口可能成為黑客、病毒與特洛伊木馬侵入您系統的途徑。 何謂端口掃描器？ 開放端口掃描器運用nmap技術，對您的設備進行檢測，以識別可能存在安全隱患的開放系統端口。 其功能包括： 迅速識別處於啟動狀態，預備接收或傳送資料的系統端口。 透過監控開放端口的活動，您能瞭解哪些應用程式和服務正在您的系統中運作。 端口掃描乃一項便捷的安全防護，助您抵禦潛在的駭客威脅。 何謂網路端口

免費的開放端口查詢工具，支援 IP 地址和網域名稱掃描，偵測常見端口狀態，幫助您了解網路安全狀況。

Online port scanners are web-based services that let users scan ports from the web. Users don't need to download any additional software, which makes these scanners ideal for quick, browser-based checks or basic security assessments.