Npcap is the industry-standard library for packet capture and network analysis on Windows. It is the successor to the older WinPcap, which has not been updated since 2013. Without Npcap (or its legacy counterpart), Wireshark would be limited to analyzing only saved capture files, rendering its live capture features useless.
| Feature | WinPcap (Legacy) | Npcap (Current) | | :--- | :--- | :--- | | | 2013 | Actively maintained (2025+) | | Windows 11/10 Support | Limited, buggy | Full native support | | Security | No Npcap Loopback | Supports loopback packet capture | | Performance | Older kernel driver | Optimized, NDIS 6.x driver | | WinPcap API Compatibility | Native | Full emulation mode available | wireshark download npcap
npcap-1.79.exe /quiet /S /install_npcap_in_winpcap_mode=yes /loopback_support=yes /admin_only=yes Even with a correct download, issues can arise. Here are the most frequent problems and solutions. Issue 1: "No interfaces found" in Wireshark Cause: Npcap driver is not running or was not installed correctly. Npcap is the industry-standard library for packet capture