Screen Resolution Detector

Detect your screen resolution, viewport size, pixel ratio, color depth, and display information.

Detecting display information...

1. Open the tool to instantly detect your current screen and viewport dimensions. 2. View your screen resolution, viewport size, and device pixel ratio. 3. Check the color depth and orientation information of your display. 4. Resize your browser window to see the viewport dimensions update in real time. 5. Copy the resolution details to share with a developer or support team.

About This Tool

The Screen Resolution Detector instantly identifies your display properties including screen resolution, browser viewport dimensions, device pixel ratio (DPR), color depth, and screen orientation. This information is essential for web developers, designers, and anyone who needs to understand their display characteristics.

For developers and designers, knowing the exact viewport size and pixel ratio is critical for responsive design testing, creating pixel-perfect layouts, and ensuring assets look sharp on high-DPI (Retina) displays. The tool shows both the physical screen resolution and the CSS pixel dimensions, which differ on devices with high pixel ratios.

The detector updates in real time as you resize your browser window, change orientation on mobile devices, or move between monitors. All detection is performed client-side using standard browser APIs - no data is sent to any server. The tool also shows useful context like whether your device is considered mobile, tablet, or desktop based on common breakpoints.

Frequently Asked Questions

Screen resolution is the total pixel count of your physical display. Viewport size is the area within your browser window where web content is rendered, excluding the browser toolbar, address bar, and scrollbars.
Device pixel ratio is the ratio between physical pixels and CSS pixels. A DPR of 2 (common on Retina displays) means each CSS pixel is rendered using 4 physical pixels (2x2), resulting in sharper text and images.
Many operating systems use display scaling to make content more readable on high-resolution screens. A 4K monitor at 150% scaling will report an effective resolution of 2560x1440 CSS pixels to browsers.
Developers use screen and viewport data to create responsive designs that adapt to different screen sizes. They also use pixel ratio information to serve higher-resolution images to Retina displays.
No. The tool only reads standard browser display properties through JavaScript APIs like window.screen and window.innerWidth. It does not access your camera, take screenshots, or collect any personal data.

Related Tools

User Agent Parser

Parse and detect your browser name, version, operating system, device type, and rendering engine.

Security and Encryption

IP Address Info

Detect your public IP address and view geolocation data, ISP details, and network information.

Security and Encryption

Aspect Ratio Calculator

Calculate and convert aspect ratios for images, videos, and screens. Find missing dimensions instantly.

Image and Media

Image Resizer

Resize images by exact dimensions or percentage entirely in your browser. Download the result instantly.

Image and Media

Keycode Info

Press any key to see its JavaScript keyCode, key, code, which, and location event properties.

Web and SEO Tools