Screen Resolution Checker
Instantly detect your current screen resolution, viewport dimensions, device pixel ratio, color depth, orientation, and more — all from your browser with no plugins required.
How to Use the Screen Resolution Checker
- Open the page — your screen details are detected automatically.
- Resize the browser window to see the viewport update in real time.
- Click "Refresh" to manually re-read all values.
Features
- Detects physical screen resolution and available screen area
- Shows browser viewport (inner window) dimensions
- Displays device pixel ratio for retina / HiDPI detection
- Shows physical pixel resolution after applying DPR
- Reports color depth and screen orientation
- Auto-updates on window resize
Screen Resolution Checker: practical uses
Use Screen Resolution Checker when you need a fast, clear, private result without creating an account. This page also supports related needs like Screen Resolution Checker online, Screen Resolution Checker test, Screen Resolution Checker so you can choose the right workflow.
When it helps
- Best for: Checking your browser, device, network, screen, microphone, camera, keyboard, or password strength quickly.
- Helpful details: Review permission prompts carefully, then use the result and troubleshooting notes to narrow down the issue.
- Next step: Use another diagnostic when the problem involves connection speed, display size, input devices, pixels, or browser data.
For the next step, try Internet Speed Test, Webcam Tester, Microphone Tester, Keyboard Tester.
Frequently Asked Questions
What is Device Pixel Ratio (DPR)?
DPR is the ratio of physical pixels to logical (CSS) pixels. Retina and HiDPI displays have a DPR of 2 or higher, meaning a 1280×800 logical viewport actually uses 2560×1600 physical pixels.
Why is viewport different from screen resolution?
Screen resolution is the total physical pixels of your monitor. Viewport is the visible area inside the browser window, which is smaller because it excludes toolbars, scrollbars, and OS chrome.
Is my screen data sent anywhere?
No. All screen data is read directly from your browser's JavaScript APIs (screen, window, navigator) and displayed locally. Nothing is sent to any server.
