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Wireless Network WatcherWhoIsConnectedSniffer
Free

Freeware from NirSoft with no paid tier.

 Free

Freeware from NirSoft; it may not be sold or bundled with commercial products.

Windows Windows
  • Shows the adapter manufacturer to help identify each device
  • Background scan with alerts for new devices
  • Passive discovery that sends no packets to other devices
  • Shows operating system, description and IPv6 address that scanners may miss
  • Can only scan the wireless network you are currently connected to
  • Built-in MAC vendor database may lag behind new assignments
  • Requires the Npcap or Network Monitor capture driver
  • Only detects devices that send packets the computer receives, and not on other subnets
Downloadable app Downloadable app
Closed source Closed source
License: Freeware License: Freeware
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked October 8, 2026

Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.