Extension
Gia Lập Mobile
Test websites on multiple mobile devices simultaneously, right in your browser. Fast responsive testing without opening DevTools.
Features
Fast responsive testing for developers and designers
Multi-device
View your website on multiple devices simultaneously in one window — compare layouts instantly.
50+ Presets
iPhone, Samsung, iPad, and popular Android devices — pick a preset, see it instantly.
Custom Resolution
Enter any width and height to test specific screen sizes on demand.
DevTools-Free
Launch directly from the extension — no DevTools toggle needed, faster for daily workflow.