What Is My Screen Resolution
Free, fast, and easy to use.
The What Is My Screen Resolution tool instantly shows your current screen or browser window resolution in pixels. No signup required — just open the page and see your result immediately.
This information is useful for troubleshooting network issues, testing responsive designs, or confirming what data your browser exposes to the websites you visit.
How It Works
- Open the tool page
- Your result is detected and displayed automatically
Best Practices
- Refresh the page if you've changed networks or browser settings and want an updated reading
- Use this information to verify VPN or proxy connections are working as expected
This tool is free to use with no signup required.
Frequently Asked Questions
What does this tool detect?
It detects and displays your current device's screen resolution — the width and height of your display in pixels.
Why would I need to check this?
Common reasons include troubleshooting display issues, providing tech support with your setup details, or checking whether your screen meets a specific application's resolution requirements.
Is my data saved anywhere?
No — this simply detects your browser's reported screen dimensions and does not store or log the information.
What's the difference between screen resolution and browser window size?
Screen resolution is your monitor's total pixel dimensions, while browser window size (viewport) is the visible area within your browser window, which can be smaller if the window isn't maximized.
Does this account for display scaling settings?
Results can be affected by your operating system's display scaling (like 125% or 150% zoom) — the tool typically reports the effective resolution as seen by the browser, which may differ from your monitor's native hardware resolution.
Why does my resolution look different on a high-DPI (Retina) display?
High-DPI displays often report a lower "logical" resolution than their actual physical pixel count, since the operating system scales content for readability — this is normal, expected behavior.
Is this useful for web design and testing?
Yes — knowing your own screen resolution helps when comparing how a website renders across different devices during design and testing.
Does screen resolution affect website performance?
Higher resolutions may require more processing to render complex pages or high-resolution images, though modern devices and websites are generally well-optimized to handle a wide range of resolutions smoothly.
Will this show a different result on my phone versus my laptop?
Yes — each device has its own screen resolution, so checking from a phone, tablet, and laptop will typically show three different results.
Is checking my screen resolution free and unlimited?
Yes, completely free with no signup, no limits, and no software to install.
The What Is My Screen Resolution tool detects and displays your current display's pixel dimensions, along with related details like viewport size and pixel density.
Why Screen Resolution and Viewport Size Aren't the Same Thing
Screen resolution refers to your physical display's total pixel dimensions, but the browser viewport — the actual visible area a webpage renders into — is almost always smaller, reduced by browser toolbars, bookmarks bars, and window borders. This distinction matters for web development, since responsive design breakpoints respond to viewport size, not raw screen resolution.
What Gets Detected
- Screen resolution — the display's full physical pixel dimensions, independent of any open browser window.
- Viewport size — the actual visible rendering area within the current browser window, which changes as the window is resized.
- Device pixel ratio — how many physical pixels correspond to one CSS pixel, relevant for high-density "Retina" style displays where images need extra resolution to appear sharp.
Why This Matters for Developers and Designers
Confirming exact resolution and viewport values helps reproduce and debug layout issues reported by users on unfamiliar devices, verify that responsive breakpoints trigger at the expected sizes, and ensure images are served at an appropriate resolution for high-density displays without wasting bandwidth on unnecessarily large files for standard displays.
