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Test on Online Browsers with LambdaTest
Test your websites on all major desktop and mobile web browsers on Our Cloud platform. 3000+ combinations of OS, Browsers, Devices, and Resolutions.
LambdaTest is now
TestMu AI
Trusted by 2M+ users globally at
"We have tripled our tests and are now executing tests in less than 2 hours with 78% Faster Test Execution"
"We figured out a more efficient way to monitor system health and resolve failures earlier in lower environments."
"TestMu AI has significantly boosted our testing speed, is easy to implement, and provides exceptional support."
"With 70% faster test execution, TestMu AI helped us achieve faster time-to-market and enhanced CX."
Test Across 3000+ Web Browsers
Test your website on real devices —like your phone, tablet, and computer—in real time. Select from 3000+ environments to easily test on the desktop or mobile web browsers.
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Test On Real Mobile & Desktop Web Browsers
Choose from a wide range of Windows PC, mac minis, iPhones, and Android smartphones with recent and legacy browsers. Access all these devices from anywhere in the world.
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Live Responsive Testing Online
With LT Browser, you can perform responsive testing of your website across 50+ viewports. You can create infinite custom viewports and build test and debug a responsive website with this FREE to use tool.
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Top 3 Features To Accelerate Web Browser Testing
Plugins & Extensions
Capture full-page screenshots and do cross-browser testing with the LambdaTest WordPress plugin and Chrome extension.
Geolocation testing
To make sure your users get the best experience possible, test your mobile app or website from different geographic locations.
Test Locally hosted pages
Localhost web testing allows you to test your dev builds to work out bugs in your website before production launch.
Automated Screenshots on Online Web Browsers
With LambdaTest automated screenshots tool on cloud, you can perform Web Browser testing across 3000+ web browsers online. Choose required configurations and time interval and you are all set for automated periodic tests.
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AI-Agentic Quality Engineering
Test AI agents such as chatbots and voice assistants to ensure efficiency, relevancy, and performance.More about Agent-to-Agent Testing
Experience the Power of Unified Testing Cloud
50%
reduction in test execution time
“HyperExecute is a highly reliable test execution platform and has excellent customer support.”
Sagar Uday Kumar
Sr. Engineering Manager
More Reasons to Love TestMu AI
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Recognized in Gartner's Magic Quadrant 2025 as a Challenger for strong customer experience.
Featured in Forrester's Autonomous Testing Platforms Landscape, Q3 2025 for innovation in AI-driven testing.
Enterprise-Grade Security, Privacy, AI Governance & ESG
We protect your data and AI systems with global security, privacy, responsible AI, and ESG standards, backed by certifications.
Wall of Fame
TestMu AI is #1 choice for SMBs and Enterprises across the globe.
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Some love from our customers!
As Best Egg expanded its product offerings and entered new markets, we knew our old testing infrastructure couldn’t keep up.
With support from Tenny Agustin, our Engineering Operations Lead, we modernized our approach with
TestMu AI
Best Egg
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Excited to Share My Learning Journey with Kane AI & Lambda Tool!
I'm pleased to announce that I've recently gained hands-on experience exploring Kane AI through the Lambda Tool and it’s been a fantastic journey of upskilling!
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Suryateja Goud
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See how is #Futureready to enable blazing-fast test orchestration seamlessly integrated with organizations' existing CI/CD platforms, using #Microsoft Azure.
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