Screen Resolution Checker

For web designers, developers, UI/UX professionals, and digital creators, understanding screen resolution is essential. Screen size, pixel density, and viewport dimensions influence how websites and applications appear across devices. Yet most users do not know their exact resolution or DPI unless they dig through system settings or use complex development tools. This lack of clarity can lead to design inconsistencies, layout issues, and inaccurate testing results. That’s why our Screen Resolution tool provides a fast and reliable solution. With one click, it detects your screen resolution, viewport size, pixel ratio, and DPI automatically—giving you accurate data for design, testing, or troubleshooting.

How to Use This Screen Resolution Tool

Using this tool is extremely simple:

• Open the Screen Resolution Checker page

• Your screen resolution is detected instantly

• View additional details including:

  • Viewport (browser window) size

  • Device Pixel Ratio (DPR)

  • Approximate DPI/PPI

• Use the data for web development, responsive testing, or UI adjustments

• Refresh or resize the window to see updated values in real time

No setup, no configuration—just instant device insights.

Features of This Tool

Our What Is My Screen Resolution? checker includes powerful, developer-focused features:

• Automatically detects screen resolution in real time

• Displays viewport size for responsive design testing

• Shows DPI/PPI and device pixel ratio

• Ideal for debugging CSS breakpoints and layout issues

• Works on desktops, laptops, tablets, and smartphones

• Clean, minimalist interface with no distractions

• 100% browser-based—no installation or permissions required

• Helps designers test multiple window sizes by simply resizing the browser

It’s one of the most accurate and convenient screen resolution check tools online.

Why Is This Tool Useful? (Benefits)

A screen resolution checker is valuable for both professionals and everyday users:

• Helps designers optimize layouts for different screen sizes

• Useful for QA testers verifying responsive breakpoints

• Supports developers who need accurate viewport data for CSS and JS calculations

• Helps users understand why sites appear differently across devices

• Saves time compared to checking device settings manually

• Enhances accuracy when designing banners, images, and UI components

• Provides instant insights for troubleshooting display scaling issues

Whether you’re building a website or optimizing user experiences, accurate resolution data is essential.

Frequently Asked Questions (FAQ)

1. Does this tool work on mobile devices?
Yes. It detects screen and viewport information for all device types.

2. Is the detected resolution always accurate?
Yes. The values are read directly from your browser and device.

3. What is the difference between screen resolution and viewport size?
Screen resolution is your monitor’s full pixel count; viewport is the visible browser area.

4. Do I need to install anything?
No. Everything works instantly in your browser.