WhatsApp operates through a relay server. A traditional "sniffer"—a tool used by network administrators to analyze traffic—might be able to see that data is moving, but it cannot decipher the content of that data due to E2EE. A standalone PC program claiming to bypass this without access to the target phone is technically impossible under the current architecture of the app.
Scammers know that people search for “WhatsApp sniffer free” in desperation. Here’s what actually happens when you download a “WhatsApp Sniffer for PC Free 67” from an untrusted source: whatsapp sniffer for pc free 67
You might see videos showing a tool with that exact name. These are . Typically, they: WhatsApp operates through a relay server