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Screen Resolution Checker

Check your screen resolution, viewport size, window dimensions, pixel ratio, and device information. This tool detects your display settings in real-time.

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Check Your Screen Resolution Instantly

Our Screen Resolution Checker displays your current screen resolution, viewport size, window dimensions, and device information in real-time. This tool is essential for web developers, designers, and anyone who needs to know their display specifications.

What Information Does It Show?

  • Screen Resolution: Your physical screen dimensions (e.g., 1920 × 1080).
  • Viewport Size: The visible area of your browser window in CSS pixels.
  • Window Size: The total size of your browser window including borders.
  • Device Pixel Ratio: The ratio between physical pixels and CSS pixels (important for high-DPI displays).
  • Color Depth: The number of bits used per color component (typically 24 or 32).
  • Available Screen Size: Screen size minus OS UI elements (taskbar, dock, etc.).

Device Information

The tool also displays additional device information:

  • User Agent: Your browser and operating system information.
  • Platform: Your operating system platform.
  • Language: Your browser's preferred language.
  • Online Status: Whether you're connected to the internet.
  • Cookie Enabled: Whether cookies are enabled in your browser.
  • Do Not Track: Whether Do Not Track is enabled.

Understanding Screen Resolution vs Viewport

It's important to understand the difference between screen resolution and viewport size:

  • Screen Resolution: The physical number of pixels on your display (e.g., 1920 × 1080). This is fixed and doesn't change.
  • Viewport Size: The visible area of your browser window. This changes when you resize your browser window or zoom in/out.
  • Window Size: The total size of your browser window including chrome, borders, and scrollbars.

Common Use Cases

  • Web Development: Test responsive designs and ensure layouts work across different screen sizes.
  • Design: Understand your display capabilities for creating graphics and layouts.
  • Gaming: Check your screen resolution for optimal game settings.
  • Troubleshooting: Diagnose display issues or verify monitor settings.
  • Testing: Verify website responsiveness and mobile compatibility.

Common Screen Resolutions

Here are some of the most common screen resolutions:

  • 1920 × 1080 (Full HD): Most common desktop and laptop resolution.
  • 1366 × 768 (HD): Common laptop resolution.
  • 2560 × 1440 (QHD): High-resolution monitors.
  • 3840 × 2160 (4K UHD): Ultra-high definition displays.
  • 1280 × 720 (HD): Standard HD resolution.
  • Mobile: Varies widely (e.g., 375 × 667 for iPhone SE, 414 × 896 for iPhone 11 Pro Max).

Device Pixel Ratio Explained

Device Pixel Ratio (DPR) is important for understanding how your screen displays content:

  • 1x: Standard resolution display (1 physical pixel = 1 CSS pixel).
  • 2x (Retina): High-DPI display (2 physical pixels = 1 CSS pixel). Common on Apple Retina displays.
  • 3x: Ultra-high DPI display (3 physical pixels = 1 CSS pixel). Common on high-end mobile devices.

Higher DPR means sharper text and images, but also requires higher resolution assets for optimal quality.

Real-Time Updates

Our tool automatically updates when you:

  • Resize your browser window
  • Change screen orientation (on mobile/tablet)
  • Zoom in or out

You can also manually refresh the information using the "Refresh" button.

Privacy & Security

All information is detected client-side in your browser. No data is sent to our servers. The tool only reads information that your browser already exposes through standard JavaScript APIs.

Frequently asked questions

How do I check my screen resolution?

Simply open the Screen Resolution Checker tool. It automatically detects and displays your screen resolution, viewport size, window dimensions, and device information. The information updates in real-time when you resize your browser window.

What's the difference between screen resolution and viewport size?

Screen resolution is the physical number of pixels on your display (fixed). Viewport size is the visible area of your browser window (changes when you resize the window). Window size includes the entire browser window including borders and chrome.

What is device pixel ratio?

Device Pixel Ratio (DPR) is the ratio between physical pixels and CSS pixels. A DPR of 2x means 2 physical pixels = 1 CSS pixel, resulting in sharper displays (Retina displays). Standard displays have a DPR of 1x.

Does the tool work on mobile devices?

Yes, the tool works on all devices including mobile phones and tablets. It detects your screen resolution, viewport size, and updates automatically when you rotate your device.

Is my information sent to a server?

No, all detection happens client-side in your browser. No information is sent to our servers. The tool only reads information that your browser already exposes through standard JavaScript APIs.

Can I copy the screen information?

Yes, click the 'Copy All' button to copy all screen and device information to your clipboard. This is useful for sharing with developers or for documentation purposes.