Browser Resizer

Test responsive web designs with device presets and custom viewport dimensions

Request Feature / Support

5,196+

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 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

AI Web Tool Generator

Build Your Own Custom Web Calculator in Seconds

Type what tool or calculator you need below. Our AI will build it instantly for your site.

About This Tool

The Browser Resizer tool allows web developers and designers to test responsive layouts by simulating various device viewports. Choose from popular device presets (iPhone, iPad, desktop monitors) or enter custom width and height dimensions. The tool provides a live preview area that mimics how your content would appear on different screen sizes, helping you ensure your website looks great on all devices. No installation required - works entirely in your browser.

Save your calculation history with a free account

How to Use

Select a device preset from the dropdown menu or enter custom width and height values
Click 'Apply Viewport' to resize the preview area
Use the rotation button to switch between portrait and landscape orientations
Toggle the device frame visibility for a more realistic preview
View current dimensions and device information in the results section
Reset to default browser size when finished testing

Frequently Asked Questions

Find Quick Answers

What is a browser resizer tool used for?

A browser resizer helps web developers and designers test how their websites respond to different screen sizes and devices without needing physical devices. It simulates various viewport dimensions to ensure responsive design works correctly.

Does this tool require any installation or plugins?

No, this is a completely client-side tool that runs entirely in your web browser. No downloads, installations, or browser extensions are required.

Can I test custom screen sizes not in the presets?

Yes, you can enter any custom width and height values in the input fields. The tool supports dimensions from 100px to 5000px for comprehensive testing.

How accurate are the device presets?

The presets use actual viewport dimensions for popular devices including iPhones, iPads, Android phones, and common desktop resolutions. They represent the CSS pixel dimensions that developers target in responsive design.

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.

Related Tools

Other useful calculators and utilities you might like

Spotify to MP3 Converter

Convert Spotify tracks and playlists to MP3 format instantly with our free online converter.

Road Distance Calculator

Calculate the driving distance and travel time between two addresses with our free online road dista...

Age Calculator

Calculate your exact age in years, months, and days from any birth date to any target date.

Currency Converter

Convert currencies instantly with real-time exchange rates and historical data support.

Your Feedback Matters

Help Us to Improve