How your website looks on 4K Monitor
Preview any website at the exact 4K Monitor viewport. Real browser rendering with accurate dimensions and pixel ratio.
3840×2160
1x
3840×2160
Desktop · 2020
Test your website
Enter a URL to see how it renders on 4K Monitor (3840×2160 @1x)
Automate 4K Monitor testing with our API
Use width, height, and device_scale_factor to capture 4K Monitor screenshots programmatically. 100 free requests/month.
curl -X POST https://api.screenshotdev.com/v1/screenshot \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"url": "https://example.com",
"width": 3840,
"height": 2160,
"device_scale_factor": 1
}'Also test on laptops & desktops
Frequently asked questions
What is the viewport size of a 4K monitor?
A 4K (UHD) monitor has a viewport of 3840×2160 pixels at 1x device pixel ratio. However, most users run 4K monitors at 150% or 200% scaling, which reduces the effective viewport.
How do I test my website at 4K?
Enter your website URL above and click Preview. We render your site at 3840×2160 with 1x scaling. Note: most real users scale their 4K displays to 150-200%, so also test at 2560×1440 and 1920×1080.
Should I worry about 4K at 1x scaling?
Most 4K users run display scaling (150-200%), so the effective viewport is typically 1920-2560px wide. Test at native 4K to ensure images are sharp, but prioritize the scaled viewport sizes for layout testing.