Screen Resolution Checker — View Your Display Info Free

Instantly see your screen resolution, viewport size, device pixel ratio, color depth, and orientation. All values update live when you resize your browser. No upload, no sign-up — 100% private.

Screen Resolution

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Physical display pixels

Viewport Size

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Browser visible area

Device Pixel Ratio

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Physical / CSS pixels

Color Depth

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Bits per pixel

Orientation

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Current display mode

Screen Type

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Device classification

Full Details

Screen Width —

Screen Height —

Viewport Width —

Viewport Height —

Inner Width —

Inner Height —

Outer Width —

Outer Height —

Pixel Ratio —

Color Depth —

Orientation —

Device Type —

CSS Pixel Width —

CSS Pixel Height —

Physical Pixels —

Aspect Ratio —

Live — resize your browser window to see changes

Screen Resolution Checker — Understand Your Display

OptiDrop's Screen Resolution Checker instantly reveals all the key details about your display. Whether you are a web developer testing responsive designs, a designer checking color output, or simply curious about your monitor's capabilities, this tool provides every detail you need. All information is read directly from your browser's APIs — nothing is uploaded, stored, or transmitted.

Screen Resolution vs. Viewport Size

Screen resolution is the total number of physical pixels your monitor can display (e.g., 1920x1080 for Full HD, 2560x1440 for QHD, or 3840x2160 for 4K). Viewport size, on the other hand, is the visible area inside your browser window — it excludes the address bar, tabs, bookmarks bar, and operating system taskbar. When building responsive websites, viewport size is the measurement that matters most, as it determines how much content a user can see without scrolling.

What is Device Pixel Ratio?

Device pixel ratio (DPR) measures how many physical pixels map to one CSS pixel. Modern smartphones and high-end laptops often have a DPR of 2 or 3, meaning each CSS pixel uses a 2x2 or 3x3 grid of physical pixels. This is why text and images look sharper on Retina and AMOLED displays. For web developers, DPR is critical when serving images — a 2x display needs images twice the CSS size to look crisp.

Common Screen Resolutions

The most common desktop resolution worldwide is 1920x1080 (Full HD), followed by 1366x768 on budget laptops. For mobile, 390x844 (iPhone 14) and 412x915 (Pixel 7) are popular. Tablets commonly use 768x1024 (iPad) or 800x1280 (Android tablets). When designing websites, it is best practice to test across these common breakpoints to ensure a consistent experience for all users.

Why Color Depth Matters

Color depth determines how many distinct colors your display can show. Most modern screens use 24-bit color (8 bits per channel for red, green, and blue), which provides over 16.7 million colors. Professional monitors for photo and video editing may support 30-bit or even 10-bit per channel color, displaying over 1 billion colors. Higher color depth results in smoother gradients and more accurate color reproduction, which is essential for creative professionals.

Frequently Asked Questions

Screen resolution is the number of distinct pixels that can be displayed on a screen, expressed as width x height. For example, 1920x1080 (Full HD) means the screen has 1920 pixels horizontally and 1080 pixels vertically. Higher resolutions provide sharper images and more screen real estate for multitasking.

Screen resolution refers to the total number of physical pixels on your display (e.g., 1920x1080). Viewport size is the visible area of a web page in your browser window, which is usually smaller because it excludes the browser toolbar, tabs, scrollbar, and taskbar. Viewport size changes when you resize your browser window, while screen resolution stays fixed.

Device pixel ratio (DPR) is the ratio between physical pixels and CSS pixels on a display. A DPR of 2 means each CSS pixel is rendered using 2x2 physical pixels, making text and images appear sharper. Retina displays on Apple devices typically have a DPR of 2 or 3. Standard monitors usually have a DPR of 1.

Color depth (also called bit depth) is the number of bits used to represent the color of a single pixel. Common values are 24-bit (16.7 million colors, standard for most displays) and 30-bit (1.07 billion colors, found on professional monitors). Higher color depth allows for smoother gradients and more accurate color reproduction.

Last updated: June 2026