Tools and Resources
If you have ever tried to find a free tool to check your home network security, you have probably run into the same problem most people do. The tools that actually do something useful are either priced for enterprise IT departments, require a Linux machine to run, or hand you a raw list of ports with no explanation of what any of it means.
This guide covers the best free options available on Windows in 2026, what each one is good for, and what it won't do. The goal is to help you pick the right tool for what you actually want to know, not just the one with the best marketing page.
Before getting into specific tools, its worth establishing what a home user actually needs from a network security scanner. The requirements are different from what an enterprise IT team would want.
For a home user, a good scanner should:
One thing to note: security scanning tools will sometimes be flagged by antivirus software because they do things that look suspicious, like probing network ports and reading system settings. This is expected behavior for any legitimate scanner. It doesn't mean the tool is malicious.
The device discovery tools like Advanced IP Scanner and Angry IP Scanner are useful but they only answer one question: what is on my network? They don't tell you whether those devices are secure, whether your router is configured safely, whether your DNS is being hijacked, or whether your Windows machine has its encryption enabled.
Nmap answers more questions but requires you to already know what the answers should look like. A list of open ports is only useful if you understand which ports are dangerous and why.
The gap in the market for home users has always been a tool that does the full security assessment and explains what it found. That is the problem SentinelHome101 was built to solve. You can read more about what a full network audit looks like in our guide on how to audit your home network security.
For most home users who want a complete security picture with actionable findings, SentinelHome101 is the most appropriate option. It covers the checks that actually matter for home network security and explains every finding without requiring any technical background.
If you already know your way around networking and want raw data for manual analysis, Nmap is the professional-grade choice. For simple device inventory with a clean interface, Advanced IP Scanner gets the job done quickly.
There is no reason you can't use more than one. SentinelHome101 for the security assessment, Advanced IP Scanner when you just want a quick look at what's connected.
SentinelHome101 runs 101 checks and explains every finding in plain English. Free for Windows.
Download Free