Screen Resolution Checker - Check Your Screen Size
Check your screen resolution, viewport size, and display information. Free online screen resolution checker.
Common Resolutions
How This Tool Works
This tool displays your screen resolution, viewport size, device pixel ratio, and other display information. The information updates in real-time when you resize your browser window. This is useful for web developers testing responsive designs and users wanting to know their display specifications.
Why Use This Tool
- ✓Check your screen resolution
- ✓View viewport dimensions
- ✓Test responsive designs
- ✓Check device pixel ratio
- ✓Monitor orientation changes
- ✓Real-time updates on resize
Frequently Asked Questions
What is screen resolution?
Screen resolution is the number of pixels your display can show, expressed as width × height (e.g., 1920×1080). Higher resolution means more pixels and sharper images.
What is the difference between screen size and viewport size?
Screen size is your entire display resolution. Viewport size is the visible area of your browser window, which can be smaller if your browser isn't fullscreen or has toolbars visible.
What is device pixel ratio?
Device pixel ratio (DPR) is the ratio between physical pixels and logical pixels. Retina displays and high-DPI screens have a DPR > 1, meaning they pack more physical pixels into each logical pixel for sharper images.
Why does my viewport size change?
Viewport size changes when you resize your browser window, toggle fullscreen, or rotate your device. The tool updates in real-time to show current dimensions.
What is color depth?
Color depth is the number of bits used to represent the color of a single pixel. Common values are 24-bit (16.7 million colors) and 32-bit (24-bit color plus 8-bit alpha channel).