34 free Windows utilities for network scanning, auditing, monitoring, and security analysis — no strings attached.
Go beyond traditional freeware. Nsauditor AI combines our proven auditing engine with artificial intelligence to deliver real-time vulnerability detection, intelligent threat analysis, and automated remediation guidance across your entire network.
Click any tool to download or learn more. All tools run on Windows.
Redirect TCP connections from a local port to any remote host and port. Ideal for tunneling, load balancing, and firewall traversal scenarios.
Scan TCP and UDP ports on any network host to discover which services are running and identify potential entry points for security review.
Audit and view all removable and portable storage devices connected to local or remote computers, including USB drives, flash cards, and external disks.
Schedule and remotely execute tasks and programs on networked Windows computers. Automate maintenance jobs and administrative scripts across your network.
Detect and monitor network adapters on local and remote machines. Displays adapter configuration, MAC addresses, and connection status in real time.
Perform WHOIS lookups for any domain or IP address. Retrieve registration details, owner information, nameservers, and expiration dates from WHOIS databases.
Reveal passwords hidden behind asterisk characters (***) in Internet Explorer and other Windows dialogs. Useful for recovering forgotten stored passwords.
Automatically submit your website URL to multiple search engines and web directories to improve search engine indexing and online visibility.
Generate and simulate network traffic patterns for testing network capacity, load balancing configurations, and bandwidth measurement on your infrastructure.
Enumerate computers, shares, printers, and network resources on Windows workgroups and domains. Quickly map what is connected to your network.
Monitor physical and virtual memory usage on remote network computers without needing to log in. Helpful for diagnosing performance issues across machines.
Monitor and display ARP cache tables on the local network to detect ARP spoofing, rogue hosts, and IP-to-MAC address mapping changes in real time.
View active TCP/UDP connections and listening ports on remote computers — similar to the netstat command — without logging into each machine individually.
Simulate Windows Messenger Service (net send) popup messages for testing purposes. Useful for verifying corporate message filtering and popup blocker configurations.
Monitor and analyze DNS queries and server responses in real time. Detect DNS poisoning attempts, identify slow lookups, and troubleshoot DNS resolution issues.
Monitor and manage Remote Desktop / Terminal Services sessions across your network. View active sessions, user details, and session statistics from a single console.
Monitor running processes and their associated network connections on remote computers. Spot suspicious processes that are listening on unexpected ports.
Generate comprehensive keyword lists for SEO, SEM, and digital marketing campaigns. Create targeted keyword combinations from seed words automatically.
Query SNMP-enabled network devices (routers, switches, printers) to retrieve MIB data, monitor device health, and troubleshoot network equipment issues.
Scan networked Windows computers for missing hotfixes, security patches, and service packs. Identify unpatched systems before attackers can exploit vulnerabilities.
Discover DHCP servers on your network and view active IP address leases, scope information, and lease statistics. Quickly detect unauthorized DHCP servers.
Identify the geographic country of origin for any IP address or range. Useful for security analysis, access control decisions, and network traffic geolocation.
Query Finger protocol servers (port 79) to retrieve user account information, login times, and idle status. A classic network reconnaissance utility.
Check your website's placement and ranking in major search engines. Verify that your site is indexed and appearing in search results for your target keywords.
Crawl a website and test all hyperlinks for broken or invalid URLs. Find 404 errors, redirects, and dead links before they hurt your SEO rankings and user experience.
Generate HTTP/HTTPS web requests to stress-test web servers, measure response times, and evaluate server performance under simulated load conditions.
Audit and analyze Windows registry entries for suspicious keys, autorun programs, and unauthorized changes. Essential for malware detection and system hardening.
Scan for and identify Browser Helper Objects (BHOs) and browser extensions installed in Internet Explorer. Detect adware, spyware, and unwanted browser add-ons.
Perform forward and reverse DNS lookups for IP addresses and hostnames in bulk. Resolve entire IP ranges to hostnames and vice versa for network documentation.
Parse and analyze web server access logs (Apache, IIS) to generate visitor statistics, identify top pages, detect errors, and spot unusual traffic patterns.
Browse, search, and manage Internet Explorer browser cache files. View cached web pages, images, cookies, and history entries for forensic analysis or cleanup.
Monitor Windows services running on remote computers across your network. Start, stop, and receive alerts when critical services change state or become unavailable.
Explore hardware devices installed on remote network computers. View device drivers, hardware configurations, and device manager data without visiting each machine.
Collect and display detailed system hardware and software information including CPU, memory, disk, OS version, installed software, and system specifications.
Our award-winning commercial products go further — with advanced scanning, reporting, and enterprise features.