Browser resizer extension

Test responsive designs with device presets and custom browser dimensions

Request Feature / Support

5,476+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Browser resizer extension processes input data instantly inside your browser.

Sample Input Image dimensions: 4000 x 3000 pixels (File size: 5MB PNG)

Computed Result Output WebP Image: 1920 x 1440 pixels (File size: 350KB, 88% reduction)

Execution Mode Client-Side In-Browser JS

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About This Tool

The Browser Resizer Extension tool allows developers and designers to simulate various device viewports for responsive web design testing. Choose from popular device presets (iPhone, iPad, Desktop, etc.), set custom width and height, toggle between portrait and landscape orientations, and customize the browser frame color. The tool renders a realistic browser frame that visually represents the specified dimensions, helping you test how your website or application adapts to different screen sizes. All functionality runs entirely client-side with no backend required.

Save your calculation history with a free account

How to Use

Select a device preset from the dropdown or enter custom width/height.
Toggle orientation between portrait and landscape if needed.
Choose a browser frame color using the color picker.
Click 'Render Browser Frame' to generate the preview.
View the result with dimensions displayed and use 'Download as Image' to save.

Frequently Asked Questions

Find Quick Answers

What devices are included in the presets?

Presets include iPhone 14 (375x812), iPad Pro (1024x1366), Desktop (1920x1080), Samsung Galaxy (360x740), and more common screen sizes.

Can I test custom screen sizes?

Yes, simply enter any width and height values in the custom inputs to test unique viewport dimensions.

Does this tool require an internet connection?

No, all functionality runs entirely in your browser with no backend or API calls needed.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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