---
title: "What Is My Screen Size? Instant Screen Resolution Checker"
url: https://stacklist.com/card/5ba7936e-e7a5-44a8-8058-fa3aef5d99b3
source_url: "https://screensizechecker.com/"
stack: https://stacklist.com/stack/13282ba7-a503-4f21-9dc0-db552e89e8a6
summary: "Screensizechecker is a web tool that detects and displays your screen resolution, viewport size, device pixel ratio, and other display properties across all devices. It helps developers, designers, and QA professionals test responsive designs and ensure compatibility across different screen sizes."
tags: "screen-resolution, viewport, device-detection, responsive-design, web-development, display-properties, pixel-ratio"
key_entities: "Device Pixel Ratio (DPR) (technology), screen resolution (concept), viewport size (concept), responsive design (concept), Retina displays (technology), aspect ratio (concept), color depth (concept)"
classification: "reference"
content_hash: "sha256:07fe9843c23601ae53162bafb374353fe2e1ec6a9c05dd9d3f1f4a2d4a11e088"
acp_version: "0.2"
token_counts_approximate: 577
visibility: public
agent_accessible: true
status: "final"
---

# What Is My Screen Size? Instant Screen Resolution Checker

What Is My Screen Size & Resolution? What Is My Screen Size & Resolution? Detecting... Screen Size Screen Resolution : Detecting... Screen Resolution Test and Screen Size Checker Use this screen resolution test and screen size checker to answer questions like "what is my screen resolution", "what is my display size", and "what is my viewport size". It reports physical screen resolution, browser viewport, aspect ratio, DPR, color depth, operating system, and browser details on phones, tablets, laptops, desktop monitors, and TVs, while also helping you compare different screen resolution sizes across devices . Resolution Test 📱 For Developers Test responsive designs and debug viewport issues 🎨 For Designers Ensure designs work across different screen sizes 🔧 For QA Verify display compatibility and pixel density Device Information Copy All Info 🖥️ Display Properties Aspect Ratio Detecting... ⧉ Device Pixel Ratio (DPR) Detecting... ⧉ Color Depth Detecting... ⧉ ⚙️ System & Browser Operating System Detecting... ⧉ Browser Detecting... ⧉ ℹ️ Advanced Information Cookies Enabled 检测中... ⧉ Touch Support 检测中... ⧉ User Agent ⧉ Detecting... Related Resources Loading... → What is my screen resolution? Your screen resolution is the physical pixel grid of your display, shown as width × height such as 1920×1080. The result above detects your current screen resolution instantly in the browser. What is the difference between screen resolution and viewport size? Screen resolution is the full physical pixel size of the display. Viewport size is the visible browser area available to a web page, measured in CSS pixels, so it can be smaller than the full screen. What is device pixel ratio? Device Pixel Ratio (DPR) is the ratio between physical pixels and CSS pixels, used to support high-resolution (Retina) displays. Why is this information important for web development? Understanding screen sizes, resolutions, and DPR helps developers create responsive websites that look great on all devices. It's essential for optimizing user experience across different screens. How do I run a screen resolution test? Open this page and the tool automatically runs a screen resolution test. It shows your resolution, display size, viewport, DPR, aspect ratio, and browser details without installing anything.