Browser isolation is a security control that runs web content in a separated environment instead of directly on the user’s device. The page may render in a remote container or virtual session, while only safe visual output reaches the endpoint. This reduces the chance that malicious scripts, drive-by downloads, or browser exploits can compromise the local machine or steal data from it.
It matters because the web is one of the most common attack paths in enterprise environments. Isolation helps protect shared workstations, unmanaged devices, and high-risk browsing such as unknown links, third-party portals, or public web apps. In defense, teams use it to contain suspicious sites, limit file and clipboard leakage, and support zero trust policies without blocking access. In attacks, adversaries often rely on the browser as the first foothold; isolation makes that foothold much harder to turn into endpoint compromise.