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Viewport Size Checker

The Viewport Size Checker is a free, browser-based tool designed to help web designers and developers visualize how content behaves within different viewport sizes. By simulating various screen dimens ions, users can ensure their layouts are responsive and adapt seamlessly across devices.

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Viewport Size Checker

Monitor and analyze viewport dimensions, device information, and responsive breakpoints in real-time.

Viewport Display

1920

×

1080

16:9 Landscape
XL
Width

1920px

Height

1080px

Ratio

16:9

Orientation

Landscape

Breakpoint Analysis
Breakpoint Min Width Max Width Status Common Devices
XS 0px 575px Inactive Small phones
SM 576px 767px Inactive Phones
MD 768px 991px Inactive Tablets
LG 992px 1199px Inactive Small laptops
XL 1200px 1399px Active Desktops
XXL 1400px Inactive Large screens
XS
SM
MD
LG
XL
XXL
Current viewport position indicated by marker
1920px
Device Information
Tools & Options
Size History
No size history recorded

How to Use This Tool

Usage instructions coming soon!
Practical Use Cases
Test how content adapts to different viewport sizes.
Ensure layouts are responsive across various screen sizes.
Visualize content behavior within fixed-width and fluid containers.
Optimize designs for mobile, tablet, and desktop views.

Key Features

Adjustable Viewport Dimensions

Simulate various viewport sizes to test content responsiveness.

Real-Time Preview

See immediate changes as you adjust viewport dimensions.

Responsive Design Testing

Ensure your content looks great on all devices.

Content Customization

Input your own content to see how it behaves within different viewport sizes.

Frequently Asked Questions

It allows you to simulate how your content behaves within different viewport sizes, helping you ensure responsive design.

Yes — it’s completely free and requires no registration.

Yes — adjust the viewport dimensions to simulate various screen sizes and test responsiveness.

The tool is currently inaccessible; please check back later.

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