๐ Full Guide
What Is My Screen Resolution? — Complete Guide
Everything you need to know about screen resolution, why it matters, and how to check or change it on any device.
๐ฅ️ What is Screen Resolution?
Screen resolution refers to the number of pixels displayed on your screen, written as width × height. For example, 1920 x 1080 means the screen is 1920 pixels wide and 1080 pixels tall. Higher resolution means more pixels, which generally results in sharper, clearer images and text.
๐ How Does This Tool Detect My Screen Resolution?
This tool uses JavaScript's built-in window and screen APIs to read your device's display properties in real time. It retrieves screen width, height, viewport size, color depth, device pixel ratio, and orientation — all without any server requests or data collection.
๐ฑ Can I Check Resolution on Any Device?
Yes! This tool works on any device — desktop computers, laptops, smartphones, and tablets. The results will reflect the actual screen resolution of the device you are using to view the page.
⚙️ How Do I Change My Screen Resolution?
On Windows, go to Settings → System → Display and select your preferred resolution. On macOS, go to System Preferences → Displays. On Android or iOS, display resolution settings may be found under Settings → Display.
❓ Frequently Asked Questions
Why is screen resolution important?▼
Knowing your screen resolution is useful for web designers, gamers, and anyone who needs to ensure digital content displays correctly. It's also important when setting up monitors or adjusting display settings for specific tasks.
Why does my resolution differ between devices?▼
Different devices have varying screen sizes and pixel densities. A phone may show a resolution of 1080 x 2400, while a desktop might show 2560 x 1440. Higher resolutions generally mean better image clarity and sharpness.
What is the difference between screen size and viewport size?▼
Screen size is the full physical resolution of your display. Viewport size is the visible area inside your browser window — it's smaller because it excludes browser toolbars, the address bar, and taskbars.
What is device pixel ratio (DPR)?▼
Device pixel ratio is the ratio between physical pixels and logical CSS pixels. A DPR of 2 (Retina) means the screen uses 4 physical pixels for every 1 CSS pixel, resulting in sharper text and images.
Does this tool work on multiple monitors?▼
Yes. If you use multiple monitors, this tool shows the resolution of the screen your browser is currently displayed on. To check another monitor's resolution, move the browser window to that screen and refresh the page.
Is this tool free and private?▼
Yes, completely free with no sign-up needed. Your screen data is read locally in your browser and is never sent to any server — your privacy is fully protected.
Does it work on all browsers?▼
Yes! This tool works on all modern browsers including Chrome, Firefox, Edge, Safari, and Opera. Make sure your browser is up to date for the best experience.
What are common screen resolutions?▼
Common resolutions include 1366 x 768 (HD), 1920 x 1080 (Full HD), 2560 x 1440 (QHD / 2K), 3840 x 2160 (4K UHD), and on phones: 1080 x 2340 or 1440 x 3200 for flagship devices.