Mobile FIRST
Test your site on 35 iPhone models directly in Chrome—no Mac or Xcode needed.
Free - Free Chrome extension — no paid tiers mentioned; use directly in Chrome.
About Mobile FIRST
A free Chrome extension that lets you test websites across 35 iPhone models (spread over 13 CSS widths from 320–890px). It simulates CSS viewport and device pixel density, sets an iOS User-Agent, and supports touch gestures so you can validate responsive layouts and interactions without a Mac or Xcode.
Key Features
- Simulate 35 distinct iPhone models
- Accurate CSS viewport widths and device pixel densities
- iOS User-Agent spoofing
- Touch gesture simulation
- Works in Chrome — no Mac or Xcode required
Who is this for?
Web developers and designers who need to test responsive layouts and mobile interactions on multiple iPhone models.
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FreeFree Chrome extension — no paid tiers mentioned; use directly in Chrome.
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