What is Strict Google Chrome Site Isolation and How to Configure it Site isolation helps each website run in its own separate space, like giving every site its own private room. This stops malicious sites from accessing your data from others. Let's take a quick look at how it works. Before we begin, be sure to subscribe to NinjaOne's IT Video Hub and our YouTube channel for more tech content like this. What is site isolation? Chrome Site Isolation is a major security upgrade that keeps websites separate, so a harmful site can't steal data from others. It does this by running each one in its own process—even for cross-site iframes. This stops harmful sites from peeking into others’ data, even if there are security bugs. It's a powerful defense against threats like Specter and universal cross-site scripting (UXSS). Quick configuration toggles Chrome lets you turn Site Isolation on or off, or customize it based on your needs. You can easily manage it through the browser’s built-in settings. Here are some toggles to try: To access Chrome's experimental Site isolation settings. Open Chrome and type chrome://flags in the address bar. Press Enter to open the flags page. In the search box, type Isolation. Find Strict site isolation and other related options. Use the downs to choose your preferred settings. This page includes several advanced isolation controls beyond the main toggle. If you need to fix compatibility issues, you can temporarily turn off Site Isolation in Chrome: Go to Chrome and type chrome://flags in the address bar. Press Enter to open the flags page. Type isolation in the search box. Find Strict site isolation and other related options.. Set it to Disabled using the dropdown menu. Click Restart at the bottom to apply the change. Keep in mind, turning this off reduces your browser security against certain attacks. In business settings, IT teams can manage Chrome Site Isolation using enterprise policies to control security across many devices. These policies— like SitePerProcess and IsolateOrigins— help enforce standards while allowing flexibility to meet company requirements. Performance impact assessment Turning on Chrome Site Isolation boosts security but can use more system resources by running each site in its own process. Most modern devices handle this smoothly, but performance may vary. Here are some considerations to take. Turning on Chrome Site Isolation boosts security, but running each site in its own process can use more system resources. Performance may vary based on your system, browsing habits, and how the feature is configured. Site Isolation can slightly affect performance like page load speed and responsiveness, but the impact is usually small, around 1 to 2% slower on average. It's most noticeable on pages with many cross-site iframes or when quickly switching between tabs from different sites. Turning on Chrome Site Isolation is a strong move to improve your organization’s security. By separating website processes, It helps protect sensitive data from advanced cross-site attacks. For more information, check out our official blog post on What is Strict Google Chrome Site Isolation and How to Configure it, linked in the description below.