DPR (Device Pixel Ratio) Checker

Check DPR, physical pixels, CSS pixels, and browser zoom level.
Your Device Pixel Ratio
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Zoom Level: —
CSS Viewport
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Physical Viewport
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Screen (physical)
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DPR meaning: DPR tells how many physical pixels equal 1 CSS pixel. On Retina/high-density displays, DPR is usually 2 or 3. When zoom is applied, DPR may change.

What Is Device Pixel Ratio (DPR)?

Device Pixel Ratio (DPR) is the ratio between a device’s physical pixels and the CSS pixels used by the browser. It tells you how many real pixels are packed into each CSS pixel on your screen.

For example, a DPR of 1.0 means one CSS pixel equals one physical pixel, while a DPR of 2.0 or 3.0 means the display has a high pixel density — commonly seen on Retina and modern smartphones.

DPR affects how sharp your text, images, and UI elements appear on your device.

Why DPR Matters

DPR plays a big role in visual quality and responsive design. It affects:

  • Sharpness of text and icons
  • Image clarity on high-density screens
  • How websites scale graphics and layout
  • Rendering of vector graphics and canvas elements
  • Retina-ready designs and responsive images

Modern devices often use 2× or 3× DPR to deliver crisp, high-resolution visuals.

What a DPR Checker Detects

Our DPR Checker typically identifies:

  • Your device’s real Device Pixel Ratio
  • Physical vs CSS pixel conversion
  • Whether your display is Retina / high-density
  • Zoom level impact on DPR
  • Browser scaling behavior

On many devices, zooming in or out can change the effective DPR, which affects layout and rendering accuracy.

Why Use a “What Is My DPR?” Tool?

You may want to check your DPR to:

  • Optimize website graphics for high-density screens
  • Check if images need @2x or @3x variants
  • Test responsive design accuracy
  • Diagnose blurry or pixelated UI elements
  • Verify device scaling for development or debugging