Best user agent switcher Chrome extensions

It changes the browser identity string, called the user agent, that your browser sends to websites, making a site think you're using a different browser, operating system or device than you actually are.

Open Chrome DevTools with F12, click the three-dot menu, choose More tools, then Network conditions, and uncheck the automatic option to pick a user agent manually from the list.

A mobile user agent switcher lets you see how a site behaves for phone visitors without owning that device, which helps developers check responsive layouts and mobile-specific content or redirects.

Yes, changing your user agent is a standard testing technique and doesn't expose extra personal data. Just confirm the extension only requests permissions related to request headers, not broader access to page content.

Some sites use additional signals beyond the user agent string, such as screen size or touch support, to detect device type more accurately, so a switcher may not fully replicate every aspect of the real device.

DevTools device mode also resizes the viewport and simulates touch input for a chosen device, while a basic user agent switcher only changes the identity string sent in requests, without altering the page layout.

No. Most people only need it for testing specific sites, so an extension that applies rules per site rather than globally is more practical and less likely to cause unexpected behavior elsewhere.

Yes, some sites serve different scripts or layouts based on the user agent, and an unexpected value can cause missing features or broken pages, which is why per-site rules and an easy way to switch back matter.

Most user agent switcher extensions from the Chrome Web Store install and run in Chromium-based browsers such as Microsoft Edge and Brave, since they use the same request-modification APIs.

It should request the declarativeNetRequest or webRequest permission along with host permissions for the sites you apply it to, and nothing beyond that, since changing headers doesn't require reading page content.

Most user agent switchers let you add a custom string in addition to built-in presets, which is useful for testing against a specific browser version or an unusual device not included in the default list.

Using a user agent switcher to test how your own browsing experience or a site you're developing renders is standard practice. Using it to bypass access restrictions elsewhere may violate that site's terms.