Name: LT Browser
Rating: 4.7 (15 reviews)

Overview

About LT Browser

LT Browser is a specialized development tool designed to streamline responsive web design testing. Built by TestMu AI (Formerly LambdaTest), it addresses the friction of modern cross-device debugging by letting developers load a single URL and preview it side-by-side across more than 50 pre-configured mobile, tablet, and desktop viewports.

A core feature is mirrored interactions: any scroll, click, or text input performed in one screen is duplicated instantly across all others in real time. This makes layout inconsistencies instantly noticeable.

LT Browser integrates smoothly with local developer setups by supporting hot reloading, so saved code updates reflect across all viewports immediately. Each device frame features its own dedicated Chromium DevTools window for isolated CSS and JavaScript debugging. Additionally, it offers built-in Lighthouse performance audits and native integrations with tools like Jira, GitHub, and Slack to log and share layout bugs effortlessly.

At a glance

Software information

Industries served, licensing and the support LT Browser provides.

Industries

Information-technology-services

Licensing

Open Source
Monthly Payment
Annual Subscription
Free
Free trial
Free version

Support

Live Chat
Phone
24x7 Support

Training

Help Guides
Blogs
On-Site Training

Knowledge Base

Help Guides
Blogs
On-Site Training

Languages (1)

English

Review analytics

What customers report

4.7

Based on 15 verified reviews

Ease of use4.5

Features & functionality4.5

Customer support4.5

Value for money4.5

Integrations4.3

What users say

Review Analytics of LT Browser

Every review is verified through Goodfirms before it's published.

4.715 Verified Reviews

Ease of use (4 reviews)4.5

Features & functionality (4 reviews)4.5

Customer support (4 reviews)4.5

Value for money (4 reviews)4.5

Integrations (4 reviews)4.2

Review Summary

Summarized from 15 verified reviews · Updated September 2026

LT Browser is widely praised for its ease of use and intuitive interface, making responsive testing accessible even to new users. Reviewers consistently highlight the scroll-sync feature for side-by-side device comparison and screenshot capture as major time-savers in the development workflow. The tool integrates with project management platforms like JIRA for streamlined bug tracking and supports local testing with hot-reloading and built-in developer tools. One reviewer noted occasional lag in screenshot capture, though performance reportedly improves with updates.

✦ AI-generated summary. May not reflect every review.

What reviewers mention most

Romila De MunshiVerified Review

Posted on May 17, 2022

“An apt and go to tool for mobile web testing”

Overall rating4.0

Ease of use5.0

Features & functionality4.0

Customer support5.0

Value for money5.0

Integrations5.0

LT Browser makes it very easy for the UI/UX developers as it provides all the features for mobile app testing and now we can effortlessly test and debug the website across different devices with zero configurations. We are also able to perform responsive mobile web testing on more than 45 pre-built devices using LT Browser. We can also do simultaneous mobile-view debugging and live interactive web app testing to ensure responsiveness across numerous devices in a side-by-side comparison.

Liz KoshyVerified Review

Posted on Apr 11, 2022

“Makes mobile application development easy and is as promising as it claims to be.”

Overall rating4.0

Ease of use5.0

Features & functionality5.0

Customer support5.0

Value for money5.0

Integrations4.0

The LT browser simplifies responsive testing with a simple UI that includes side-by-side comparative views and mirrored interactions. Thanks to this application, we were able to test our clients' websites on higher resolutions with bespoke device settings. It collaborates with Lighthouse to provide real-time website performance measurements depending on the devices we use to evaluate websites. It simplifies responsive testing, and we can now start testing our web pages in local contexts by just adding the URL.

Ismail Kuden, Co-Founder at Kuden RugsVerified Review

Posted on Mar 23, 2022

“LT Browser is a powerful and intuitive browser automation tool that makes it easy to test web applications and websites”

Overall rating4.0

Ease of use4.0

Features & functionality4.0

Customer support3.0

Value for money4.0

Integrations3.0

My company is using LT Browser for a long now and it supports both Windows and MacOS, and it's very easy to use - even for those who are new to automated testing. LT Browser is one of the most popular automated testing tools on the market, and it has been used by some of the largest companies in the world. It's been praised for its ease of use, power, and flexibility, and it's a great choice for anyone looking for an all-in-one automated testing solution.

Dennis SimoniVerified Review

Posted on Mar 21, 2022

“best responsive website testing tool in the market you could go for”

Overall rating5.0

Ease of use4.0

Features & functionality5.0

Customer support5.0

Value for money4.0

Integrations5.0

LT Browser is quite a productivity horse and our go-to tool for responsive mobile web testing. It is as simple as surfing a website on any browser to see how well our website functions on different devices. Another plus is the availability of more than 50 device viewports (though we hardly use 20 of them), which not only helped with the responsive testing feature but also let us stay a step ahead by avoiding website breakage for any device users. It brought design and dev team closure as visualization is easier so meetings are shorter.

Damini PassiVerified Review

Posted on Mar 4, 2021

“LT Browser - A Tool For Testing Faster & Precise Responsive Web Apps”

Overall rating5.0

I love the LT browser period. Reason? because it delivers easiness. It makes responsive web development and testing faster and better with its clean user interface. LT Browser has helped us test our clients' websites for higher resolutions with mirrored user-interactions. Being a design agency, LT Browser has helped us to save a lot of time when it comes to responsive web testing, and trust me time is money in our line of work. We were able to test across 45+ pre-installed mobile devices, mark bugs, record videos of bugs with easy sharing options using ClickUp. With touch screen mode, we were able to test our website's behavior by emulating a finger touch scroll and troubleshoot for better results.

Dina DzousaVerified Review

Posted on Feb 17, 2021

“Easy testing across latest Apple, Samsung and OnePlus smartphones.”

Overall rating5.0

Side side by view with mirrored interaction came handy to check the responsiveness of the website. It is as simple as leisure surfing on google chrome. UI is intuitive for even newbies.

Screen Touch mode is a handy feature to analyze the touch behavior. It imitates the real device without any hiccups

It’s ability to local host testing, hot reloading and debugging tools combined helps a lot with productivity. Even our designer teammates use it to visualize the webpage. They verify the resolution criterias of design documents using LT Browser. Really helpful tool for web designers and developers.

Kevin MahoneyVerified Review

Posted on Jan 22, 2021

“Our go to mobile testing tool”

Overall rating5.0

LT Browser is the new defacto tool for responsive testing requirements. Being a ecommerce company with wide audience we need to stay on our toes to keep our users bouncing because of a UI bug. LT browser has been helping us for the past 3 months with testing on the latest mobile view ports. And my favorite feature is instant local testing by simply adding the URL and side by side comparison of two devices. And best part of the debugging is that we can see the changes being reflected in real time

Christopher HewinsVerified Review

Posted on Jan 8, 2021

“Helped us develop mobile websites faster!”

Overall rating5.0

As website designers our team loves the way we can show all the progress to our clients. It helped us have a better transparency in our work. We can just screen grab the viewport and easily share it with clients. And the best part is the interface, it's intuitive enough that none of us have ever looked at the support doc. Ability to test the local url path with JIRA saves a lot of time and makes it easier to communicate within the team. Kudos Team LT Browser..!!

Thelma PowellVerified Review

Posted on Nov 9, 2020

“Saves huge amount of time across designs/devs”

Overall rating4.0

LT browser has helped us visualize websites on latest devices and this has been an exciting feature to showcase to our clients. Being a web development startup, LT browser is super affordable for us. We could screengrab the latest devices within no time and could easily share with clients. The interface is very easy to get going with responsive testing. Any bugs we discover can be shared across the team using JIRA which saves us a lot of time and avoids the manual work. We could also perform local testing without even installing any extensions, an extremely helpful and important feature for us. Thanks LT browser Team!

Alina NovikavaVerified Review

Posted on Oct 28, 2020

“Must have tool for web designers & developers”

Overall rating5.0

Responsive testing can be a really daunting task. To ensure that all media queries are working properly for specific screen sizes is bound to be time consuming. However, LT browser has made the task comparatively easy for me and my team. It enabled us to test on multiple pre installed devices in no time. Plus, we can test over 2 devices at the same time in a side by side view.

Our development team relies heavily over this tool since it offers hassle-free local testing experience, supports hot-reloading and offers developer tools to help us debug any UI bug on the go.

Even our design team loves the LT browser due to its intuitiveness. They are always intrigued to check if the changes are rendering well and as per the design or not after every release cycle. With LT browser, they can do it easily without having to install anything or dealing with developer tools mobile-view debugging.

Capabilities

LT Browser features

The full feature set, grouped by module.

Automated Testing

Code-less Testing
Test Reports
Test Recording
UI Testing

Plans

LT Browser pricing

Free Version

Yes

Payment Frequency

Monthly Payment, Annual Subscription, Free

Preferred Currency

USD ($)

Free Trial

30 Days

Vendor pricing page

Media

Screenshots & video