Professional mobile device simulator with multiple views, extensive device library, and sync scrolling
Users
1,000
0 in 30 days
Rating
4.6 / 5
−0.40 in 30 days
Ratings
10
+2 in 30 days
Store rank
#26K
#22K among extensions
Version
2.2.0
updated 18 Aug 2026
Users
monthly, 10 months
Latest, 15 Oct 2026:1,000 usersMove the mouse over the chart for any month
Ratings count
monthly, 10 months
Latest, 15 Oct 2026:10 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Mobile Simulator MSIM Responsive Viewer
Mobile Simulator MSIM Responsive Viewer
Test, preview, and debug responsive designs across a large library of mobile devices and tablets with a Mobile Simulator for Chrome.
🚀 Why Choose Mobile Simulator MSIM?
Designing for the modern web requires testing across dozens of screen sizes. Mobile Simulator MSIM Responsive Viewer transforms your browser into a professional testing suite, allowing you to simulate any smartphone or tablet directly on your desktop.
📱 Extensive Device Library
Stop guessing how your site looks. Our Mobile Simulator provides high-fidelity frames for popular iPhones, iPads, Samsung Galaxy, Google Pixel, and other common Android phones and tablets.
Need a specific breakpoint? Use our Custom Device tool to enter any width and height.
🔥 Top Professional Features
Sync Scroll (Synchronized Scrolling): Scroll on one device and watch all other simulated screens follow in real-time. Perfect for side-by-side comparison testing.
Multi-View Mode: Open 2, 3, or 4 devices simultaneously to view your entire responsive grid at once.
Device Frames & Notches: See your website exactly as your users do, including hardware frames and screen notches for a realistic Mobile View.
One-Click Rotation: Instantly toggle between Portrait and Landscape modes to test orientation changes.
Quick Action Sets: Use pre-configured bundles like the "Popular 3-Pack" or "iOS Set" to speed up your workflow.
GEO Checker: From Quick Actions, enter your website URL and open GEO Checker to see what ChatGPT knows about your site — and how to make it know more.
🛠 Built for Developers & Designers
Whether you are a web developer debugging a CSS issue or a designer performing a UX audit, this Responsive Viewer provides a seamless environment to ensure your site is mobile-friendly. It is a more visual and intuitive Mobile Simulator experience than a single-viewport DevTools check.
Transform your workflow today. Install the Mobile Simulator MSIM Responsive Viewer and build a better mobile web.
Growth
Window
Users
Change
Ratings
Rating
7 days
0
+0.0%
+1
−0.40
30 days
0
+0.0%
+2
−0.40
6 months
+334
+50.2%
+6
−0.40
Chrome Web Store search rankings
Where Mobile Simulator MSIM Responsive Viewer appears when people search the store, with the 30 day change