Samsung Galaxy S24 Ultra: CSS viewport of 384 × 832 px, resolution and responsive test

Samsung · Android 16.0 · Smartphone · 2024

Samsung Galaxy S24 Ultra, smartphone Samsung from 2024, displays a CSS viewport of 384 x 832 pixels. Below, find its 2.8125x density, ready-to-copy media queries, and how to test your site on it without buying the device.

Test your site on Samsung Galaxy S24 Ultra directly in your browser, without buying the device.

  • Samsung Galaxy S24 Ultra available in the device list
  • Real viewport, User-Agent, and touch events
  • Also works on localhost and in pre-production
  • Exportable screenshots and videos
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Why test your site on Samsung Galaxy S24 Ultra?

Very elongated screen

With a ratio of 19.5:9, Samsung Galaxy S24 Ultra displays a lot of height for little width. Sections designed in landscape become endless columns, and full-screen visuals are poorly cropped.

2.8125x density

With a density of 2.8125x, Samsung Galaxy S24 Ultra provides a useful benchmark to ensure your images remain sharp without serving unnecessarily large files.

Actual media queries

The 384 x 832 pixels viewport of Samsung Galaxy S24 Ultra rarely matches the round breakpoints of frameworks. It is precisely between these values that layouts break.

CSS viewport resolution of Samsung Galaxy S24 Ultra

This is the width your CSS considers. All your breakpoints and media queries compare to this value, not the number of physical pixels on the panel.

  • 384 pixels in width
  • 832 pixels in height

The height remains indicative: Safari, Chrome, and other mobile browsers reduce the visible area with their address bar, which folds on scroll.

Be cautious when analyzing your statistics: some tools only report the manufacturer resolution, never the CSS viewport presented here.

Pixel density of Samsung Galaxy S24 Ultra

2.8125

The device pixel ratio of Samsung Galaxy S24 Ultra is 2.8125.

Your images should therefore be exported 2.8125 times larger than their display size, otherwise they will appear softened on this screen.

Manufacturer resolution of Samsung Galaxy S24 Ultra

This is the actual number of pixels on the panel. This value does not affect your layouts, but it's the one reported by technical specifications and most analytics tools.

  • 1440 pixels in width
  • 3120 pixels in height
  • 19.5:9 Screen ratio

Le panneau atteint 1440 x 3120 px mais l'appareil sort d'usine en FHD+ : le navigateur rapporte une densité de 2.8125x, soit 1080 x 2340 px réellement adressés.

User-Agent of Samsung Galaxy S24 Ultra

This string is what the browser of Samsung Galaxy S24 Ultra sends. It is useful for your automated tests, reading your server logs, and server-side detection.

User-Agent

User-Agent string used by Samsung Galaxy S24 Ultra, useful for your automated tests and logs.

Mozilla/5.0 (Linux; Android 16; SM-S928B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.260 Mobile Safari/537.36

Media queries and code snippets for Samsung Galaxy S24 Ultra

These snippets are generated from the exact characteristics of Samsung Galaxy S24 Ultra. Copy them directly into your stylesheet or configuration.

CSS media query

Targets screens whose width matches that of Samsung Galaxy S24 Ultra and models of the same format.

@media only screen and (min-width: 384px) and (max-width: 831px) {
  /* Samsung Galaxy S24 Ultra */
}

Density media query

Serves high-resolution images to screens of at least 2.8125x.

@media only screen and (-webkit-min-device-pixel-ratio: 2.8125),
       only screen and (min-resolution: 270dpi) {
  /* High-density images and icons */
}

Tailwind configuration

Adds a named breakpoint at the exact width of Samsung Galaxy S24 Ultra.

// tailwind.config.js
module.exports = {
  theme: {
    screens: {
      'samsung-galaxy-s24-ultra-2024': '384px'
    }
  }
}

JavaScript detection

Detects format and density client-side.

const isDeviceWidth = window.matchMedia('(min-width: 384px)').matches;
const isHighDensity = window.devicePixelRatio >= 2.8125;

Meta viewport tag

Essential for Samsung Galaxy S24 Ultra to use its CSS viewport and not a simulated width of 980 pixels.

<meta name="viewport" content="width=device-width, initial-scale=1">

Free Samsung Galaxy S24 Ultra simulator

Mobile FIRST includes Samsung Galaxy S24 Ultra: your page displays in a viewport of 384 x 832 pixels, with the model's User-Agent, touch events, and scrolling behavior of a real mobile.

This is where the difference with Chrome DevTools' responsive mode is seen: DevTools resizes a window, the extension replicates the device's browser and allows exporting shareable screenshots and videos.

  1. 01 Install the extension Add Mobile FIRST to Chrome, Firefox, or Edge. Installation is free and requires no account.
  2. 02 Open the page to test Go to the URL to check, including a local address like localhost:3000.
  3. 03 Choose Samsung Galaxy S24 Ultra Select Samsung Galaxy S24 Ultra from the list of devices. The viewport switches to 384 x 832 pixels, and the mobile User-Agent is applied.
  4. 04 Check rendering Scroll, change orientation, test your forms, then capture an image or video to share.

Comparison with similar models

The neighboring formats of Samsung Galaxy S24 Ultra are the ones to test right after, as they reveal poorly placed breakpoints.

Comparison of resolutions of Samsung Galaxy S24 Ultra and nearby models
Model CSS Viewport Pixel density Manufacturer resolution
Samsung Galaxy S24 Ultra 384 x 832 2.8125x 1440 x 3120
Samsung Galaxy S24 360 x 780 3x 1080 x 2340
Samsung Galaxy Z Flip3 360 x 880 3x 1080 x 2640
Apple iPhone 16 393 x 852 3x 1179 x 2556
Apple iPhone 15 393 x 852 3x 1179 x 2556
Apple iPhone 15 PRO 393 x 852 3x 1179 x 2556
Samsung Galaxy A17 412 x 892 2.625x 1082 x 2342

Frequently asked questions about Samsung Galaxy S24 Ultra

What is the CSS viewport resolution of Samsung Galaxy S24 Ultra?

The CSS viewport of Samsung Galaxy S24 Ultra measures 384 pixels wide and 832 pixels high. This is the width to use for defining your media queries, not the manufacturer's resolution.

What is the pixel density of Samsung Galaxy S24 Ultra?

The device pixel ratio of Samsung Galaxy S24 Ultra is 2.8125. Each CSS pixel is thus displayed by 2.8125 physical pixels, requiring you to provide your images in 2.8125x to keep them sharp.

What is the screen resolution of Samsung Galaxy S24 Ultra?

The panel of Samsung Galaxy S24 Ultra displays 1440 x 3120 physical pixels. This is the value reported by most analytics tools, while your CSS works on a viewport of 384 x 832 pixels.

What is the User-Agent of Samsung Galaxy S24 Ultra?

The User-Agent of Samsung Galaxy S24 Ultra is: Mozilla/5.0 (Linux; Android 16; SM-S928B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.260 Mobile Safari/537.36

How to test my site on Samsung Galaxy S24 Ultra without the device?

Install the Mobile FIRST extension on Chrome, Firefox, or Edge, then select Samsung Galaxy S24 Ultra. Your page displays in a viewport of 384 x 832 pixels with the corresponding mobile User-Agent, in two clicks and for free.

What is the difference with Chrome DevTools' responsive mode?

DevTools resizes the window and applies partial emulation. Mobile FIRST additionally applies the User-Agent of Samsung Galaxy S24 Ultra, touch events, scroll behavior, and the actual appearance of the device, and allows capturing directly usable images and videos.

Can I test a localhost address on Samsung Galaxy S24 Ultra?

Yes. The extension works on any URL open in your browser, including localhost:3000, 127.0.0.1, or a password-protected pre-production environment.

Do you need to buy a Samsung Galaxy S24 Ultra to test your site?

No. The simulation covers the vast majority of development needs at no cost. A final test on a real device is still recommended before critical production deployment, but it's no longer necessary for each iteration.

Which media query to use to target Samsung Galaxy S24 Ultra?

A media query on the exact width targets Samsung Galaxy S24 Ultra: @media only screen and (min-width: 384px). Combine it with the pixel density to precisely target this model and those sharing its format.

Continue testing on another model

All Samsung resolutions → All devices →

Other Samsung models

Test your site on 77 devices, directly in your browser

Without buying a single phone, without creating an account.

  • 77 devices available upon installation
  • Real viewport, User-Agent, and touch events
  • Also works on localhost and in pre-production
  • Exportable screenshots and videos
Install the extension

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