Check Your Screen Size and Resolution
See your screen's dimensions, resolution, pixel ratio, and viewport size at a glance. Resize the browser window and watch the values update in real time.
Handy for developers testing responsive designs, reporting display specs for bug reports, or checking whether your screen meets the requirements for a particular application.
800 × 600
Current viewport size (CSS pixels)
Screen Resolution
800 x 600
Physical screen pixels
Viewport Size
800 x 600
Browser viewport (CSS pixels)
Device Pixel Ratio
1x
Standard density
Effective Resolution
800 x 600
Physical pixels (screen × DPR)
Color Depth
24-bit
True color
Orientation
portrait primary
Screen orientation
Touch Screen
No
Touch input support
User Agent Viewport
1:1
CSS pixel = 1 device pixel(s)
Frequently Asked Questions — Screen Size Checker
Screen resolution, viewport size (browser window), device pixel ratio, and color depth. Updates live if you resize the window.
How many physical pixels per CSS pixel. 1 on standard displays, 2 on Retina/HiDPI, 3 on some phones.
Yes. Check how your viewport changes at different browser sizes. Helps verify media query breakpoints.
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