Windows Emulator Online
Run a Windows 10 or Windows 11 emulator online in your browser - load your site in real Chrome, Firefox, Edge, Brave, or IE. No download.
Automate Browser Flows from your
Terminal with Kane CLI
Trusted by 3M+ 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."
Windows 10, Windows 11, and Legacy Emulators Online
Run Windows 10 and Windows 11 emulator sessions online, debug them live, and test localhost - free to start, with nothing to download.
WINDOWS 10
Windows 10 Emulator Online
Launch a Windows 10 emulator online and load your site in real Chrome, Firefox, Edge, or IE - streamed straight into the tab you are already in.
Get Started For Free- Genuine Windows 10, not a skinned desktop lookalike.
- Pair Windows 10 with any browser version you need.
- Open it from macOS, Linux, or a Chromebook.
WINDOWS 11
Windows 11 Emulator Online
Run a Windows 11 emulator online to see how your site renders on the newest Edge and Chrome builds before your users do.
Get Started For Free- Current Windows 11 browser builds, betas included.
- Compare Windows 11 and Windows 10 side by side.
- Catch font, scaling, and rendering shifts early.
FREE PLAN
Free Windows Emulator Online, No Download
Start free with live testing minutes that renew monthly. Nothing to install, no admin rights, and it opens in a plain browser tab.
Get Started For Free- Free plan with live Windows sessions every month.
- No download, no VM, no dual boot, no credit card.
- Runs on locked-down school and office machines.
LIVE BROWSER ACCESS
See How Your Site Renders on Windows
Load your URL, click through real user flows, and see the result on the exact Windows and browser combination you need.
Get Started For Free- Switch Windows version mid-session, no restart.
- Verify font, color, and UI rendering across versions.
- Log bugs to Jira, GitHub, or Slack from any session.
IN-SESSION DEBUGGING
Live Debugging on Windows Browsers
Native browser DevTools are built into every session, so you debug on Windows without installing anything locally.
Get Started For Free- Check DOM, CSS, and network requests in real time.
- Mark bugs with an annotated screenshot in one click.
- Run JavaScript in the console and test fixes live.
INSTANT ACCESS
Scale Windows Tests Without Hardware
Windows browser emulators are pre-configured and ready in the cloud - test earlier in your development cycle and reduce infrastructure costs.
Get Started For Free- Latest Windows browser versions and beta builds.
- Test at a fraction of the cost of real devices.
- Scale in CI pipelines with zero extra infrastructure.
TUNNEL TESTING
Test Localhost on Windows Browsers
Test locally hosted sites on any Windows browser before they go live - via TestMu AI Tunnel.
Get Started For Free- No terminal commands or proxy config required.
- Self-signed SSL certs work with no security errors.
- Test internal or VPN-gated sites without a public URL.
Simulate, Scale, and Record Every Windows Session
Network Throttling
Simulate 3G, 4G, 5G, and offline network conditions on any Windows browser to catch slow-loading bugs before they reach users.
IP Geolocation
Test how your website behaves for users in different regions - simulate geo IPs from multiple countries on any Windows browser.
Test Evidence & Logs
Every Windows browser session captures a video recording, network logs in HAR format, and screenshots - all accessible via a shareable session link so your team can replay and reproduce any bug.
Success Stories of TestMu AI (Formerly LambdaTest)
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
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
best-egg
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!
KaneAI
Suryateja Goud
suryateja-goud
See how is #Futureready to enable blazing-fast test orchestration seamlessly integrated with organizations' existing CI/CD platforms, using #Microsoft Azure.
TestMu AI
Microsoft India
MicrosoftIndia
More Reasons to LoveTestMu AI (formerly LambdaTest)
See how TestMu AI improves your testing with seamless integration, quicker results, and unmatched accuracy.
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TestMu AI Named a Challenger in the 2025 Gartner® Magic Quadrant™
Read ReportTestMu AI recognized in The Forrester Wave™: Autonomous Testing Platforms, Q4 2025
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TestMu AI is the #1 choice for SMBs and enterprises across the globe.
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Works where you work, 120+ integrations with the tools your team relies on.
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TestMu AI forEnterprise
Get access to solutions built on enterprise-grade
security, privacy, & compliance
- Advanced access controls
- Advanced data retention rules
- Advanced Local Testing
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- Early access to beta features
- Private Slack Channel
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