Apple iPhone 17 Pro Max – Viewport, Resolution & Specs

Apple iPhone 17 Pro Max - Ready to simulate

The Apple iPhone 17 Pro Max is one of the most popular modern smartphones for web designers and front-end developers to test responsive layouts.

If you want to check how your website looks and behaves on this device, you can easily simulate it using the Phone Simulator – Mobile Emulator Tool Chrome extension — no real device required.

Viewport Size (CSS Resolution)

This is the resolution that matters most to designers and developers — it defines media query breakpoints, layout scaling, and how elements adapt to the screen.

For the Apple iPhone 17 Pro Max, the CSS viewport measures:

  • Width: 440 px
  • Height: 956 px*

ℹ️ Note: The visible height can vary slightly depending on the browser UI (Safari, Chrome, etc.).

Some analytics platforms only display the physical screen resolution (see below) instead of the CSS viewport size, so keep that in mind when interpreting results.

Test on Apple iPhone 17 Pro Max Instantly

Preview your responsive website on the Apple iPhone 17 Pro Max right inside your browser.

Install the Phone Simulator – Mobile Emulator Tool and test across 30+ mobile devices with just two clicks. It’s fast, free, and doesn’t require any external services.

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Pixel Density (Device Pixel Ratio)

The Apple iPhone 17 Pro Max has a device pixel ratio of 3 — meaning each CSS pixel is represented by three physical pixels.

This ensures sharper visuals, crisper text, and smoother icons on high-resolution displays.

For CSS targeting:

@media only screen and (-webkit-min-device-pixel-ratio: 3) { 
    /* High-DPI specific styles */ 
}

In JavaScript:

window.devicePixelRatio 
// returns: 3

Physical Screen Resolution

Based on its pixel density, the manufacturer’s screen resolution equals:

  • Width: 1320 px
  • Height: 2868 px
The Apple iPhone 17 Pro Max provides a large, high-definition display ideal for testing responsive layouts, images, and typography.

About the Apple iPhone 17 Pro Max

The Apple iPhone 17 Pro Max released in 2025.

As Apple’s flagship model, the iPhone 17 Pro Max blends power, design, and advanced display technology into one premium experience.

Using the Phone Simulator – Mobile Emulator Tool, developers can preview websites exactly as they would appear on this device — helping ensure a consistent user experience across screens.

Try It Now 💫

Start testing your website on the Apple iPhone 17 Pro Max and other smartphones and tablets directly in Chrome.

No physical devices, no setup — just realistic mobile previews.

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