Phone Simulator is a free Chrome extension that lets you preview any website on 30+ real mobile device presets – directly in your browser. No physical devices, no setup. Just open any site, click the extension, and instantly see how your layout looks on iPhone, Android, or iPad with accurate viewports, pixel ratios, and realistic device frames.

Switch between devices in one click, rotate portrait and landscape, and test on localhost too. A perfect companion to Chrome DevTools for developers, designers, and QA teams who want faster, more visual mobile testing.