Free Responsive Website Emulator

Build, Test & Debug Responsive Websites With Our Life Time FREE Tool LT Browser.

DownloadWatch in Action
Ltbrowser Laptop testingEnter

Device 1

Device 2

iPhone 12 pro(1170x2532)


Google Pixel (1080 x 1920)

Google Pixel

Why my mobile website refused to connect? : Your website may not be supporting iframe. Don't worry LT Browser has it covered. Download and install LT Browser to enjoy un-interrupted mobile website testing for FREE!!


Debug With The Power of Chromium

The latest version of LT Browser uses the latest native Chromium rendering engine (Blink), offering faster performance and more features than ever. Now perform responsive website testing by taking advantage of Chromium engine features, such as using Chrome settings and APIs, including access to some of your favorite Chrome extensions.
LT Browser With Chromium

LT Browser is now Chromium-based

The all-new Chromium-based LT Browser 2.0

Try it out now!
Interact and Test With More Devices

Interact and Test Mobile Websites 4X Faster

LT Browser 2.0 allows you to test your responsive designs on up to four device viewports at once, giving you access to a plethora of Android and iOS devices for testing. The earlier version of LT Browser allowed users to interact with only two devices, but now you can test and interact with up to four devices in real-time.

Record With Entire Screen or Browser Tab

With the latest version of LT Browser, you have multiple video recording options. You can now record the entire screen or a particular LT Browser tab over a tablet or mobile view. Later, if you find anything peculiar about your responsive web application, you can review these videos with your team.
LT Browser With Chromium

Accelerate Testing with Our Responsive Website Emulator


Multiple Bug Logging

Generate multiple error reports, and resolve them faster with your favorite team management tool.


In-built DevTools

Test and debug your webapps on multiple screen sizes, any time you want, using the native DevTools.


Network Simulation

Leverage the speed test in LT Browser to know if your mobile-friendly website works on slow 3G to 5G networks.


Google Lighthouse Report

See where your website ranks in terms of its accessibility, search engine optimization and other important factors with one report.


Debug 4X Faster

Eliminate the need for switching back and forth between your devices. Test your website on four device viewports at once.


Multiple Recording Options

Now record your entire screen or a particular tab over any device viewport to debug responsive websites.

Trusted By 2 Million+ Developers & QA Teams


What is a responsive website?
A responsive website is a website that provides the same optimal viewing experience on any device. It uses fluid, proportion-based grids and flexible images to adapt the layout of content to the size of the screen, no matter what device or window size.
How can I test responsive website?
LT Browser is a handy website emulator for checking the responsiveness of your website on several kinds of devices. It allows you to create custom screen resolutions and then test your site for responsiveness at each resolution.
What is responsive website emulator?
It is a type of software or virtual environment designed to emulate the responsive behavior of a website over multiple screen resolutions. LT Browser is the best website emulator for development and testing of a website.
Why responsive website testing is important?
You should test responsiveness of your website to make sure it responds well to users coming from different browsers, devices and screen sizes. It is a best way to make sure your site runs as smoothly as possible.
What are the popular devices I should test my website on?
Following are the major devices one should consider fot responsive testing.
Mobile- iPhones, Samsung Galaxy series, OnePlus phones of past 2 to 3 years.
Tablets- iPads and Samsung Tablets launched in past 3 to 4 years
PCs- Laptops from Lenovo, Dell, Apple for past 5 years
How to make my website responsive?
There no one size fits all but following are the major points should keep in mind for testing the website.
  • 1. Choose a mobile responsive theme for website
  • 2. Use light images , videos, and CSS
  • 3. Prefer easy to read font and font size
  • 4. Check for CTA designs, size and placement
  • 5. Avoid un necessary pop-ups
  • 6. Avoid un necessary hyperlinks on website
  • 7. Test website regularly
What is the difference between responsive and adaptive design?
Responsive website is fluidic enough to adapt to any shape or size of the viewing device. Adaptive website first detect a predefined resolution and shows pre decided static elements of the website. Google ranks mobile friendly websites higher then any other form of website.
What is a website emulator?
A website emulator is a tool that allows you to view and interact with a website as if you were using a different device, operating system, or web browser. This can be useful for testing how a website looks and works on different platforms or for accessing sites that may not be compatible with your current device or browser.