Browser Size
Detect your viewport and browser window dimensions in real-time.
Your Viewport Size (Inner)
This is the area available for your website content.
Outer Window
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Screen Position
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Device Pixel Ratio
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User Agent String
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Viewport vs. Window Size
Understanding the difference between viewport and window size is crucial for web development and responsive design.
Inner Size (Viewport)
The viewport is the visible area of a web page. It excludes the browser's address bar, tabs, and toolbars. This is the most important measurement for CSS media queries.
Outer Size (Window)
The outer window size includes everything: the viewport plus all browser toolbars, scrollbars, and window borders.
Why monitor browser size?
- Responsive Testing: Check how your site looks at specific breakpoints without opening dev tools.
- Debug Layout Issues: Identify if a scrollbar is causing unexpected layout shifts.
- User Experience: Understand the actual space available to your users on different devices.