1
Open the Tool
The tool automatically detects your current viewport size when you open the page. No setup required!
Viewport Size Detector
Detect your browser viewport size in real-time. See width, height, and device type instantly. Perfect for responsive design testing and debugging.
100% FreeReal-Time DetectionDevice Type Detection
Viewport
0 × 0
pixels
Common breakpoints
MobileActive
< 640px
Tablet
640px – 1023px
Desktop
≥ 1024px
Workflow
Run it in three steps
Detect your browser viewport size in real-time in three easy steps.
2
Resize Your Browser
Resize your browser window and watch the dimensions update in real-time. The device type will change automatically.
3
Copy Dimensions
Click "Copy Dimensions" to copy the viewport size to your clipboard. Perfect for sharing or documentation.
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