Test Website On Different Browsers
Load your website in Safari on macOS from a Windows laptop, or in Chrome, Firefox, and Edge, plus Android and iOS mobile browsers. Start free with 2-minute live sessions each month.
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"With 70% faster test execution, TestMu AI helped us achieve faster time-to-market and enhanced CX."
HOW IT WORKS
How to Test Your Website on Different Browsers
To test your website on different browsers, run it in real browsers hosted by TestMu AI and compare how each one renders and behaves.
Start Testing Free
- Step 1: Enter your URL and pick a browser, version, and OS
- Step 2: Click Start to open a live browser session
- Step 3: Check layout and flows, then debug with DevTools
- Step 4: Switch browsers mid-session to compare results
Test Websites on Different Browsers With DevTools and Local Tunnels
Use real browsers, native DevTools, Chrome extensions, and a local tunnel from one live session on TestMu AI.
REAL BROWSER COVERAGE
Test on Real Desktop Browsers and Virtual Mobile Devices
Run your site on real desktop browsers and virtual mobile devices that TestMu AI hosts and keeps updated.
Start Testing Free- Latest and older browser versions to match your users
- Virtual Android and iOS devices for mobile browsers
- Test Safari on macOS and iOS without owning a Mac
DEVELOPER TOOLS
Debug Any Browser With Native DevTools
Open DevTools inside the live session to debug on the exact browser and OS where the issue appears.
Start Testing Free- Inspect and edit CSS live in Chrome, Firefox, Edge, and Safari
- Capture network requests and payloads to trace API issues
- Set breakpoints and step through JavaScript
CHROME EXTENSIONS
Test With Chrome Extensions Loaded
Load Chrome extensions into a desktop session to check how they change your site. This feature is available on paid plans.
Start Testing Free- See how ad blockers hit analytics, paywalls, and checkout
- Verify login and checkout with password managers loaded
- Preload extensions so they load before every session
LOCAL TESTING
Test Localhost Before It Goes Live
Check builds that are not public yet, from your laptop or a private staging server. Tunnel testing is available on paid plans.
Start Testing Free- Reach localhost and staging over an encrypted tunnel
- Start the tunnel from the command line or the Underpass app
- Share the tunnel so teammates debug the same build
Check Your Website in Different Browsers and Screen Sizes
Screen Resolution
Change screen resolution mid-session to see how your layout responds across different sizes.
Real Mobile Devices
Open your site on 10,000+ real Android and iOS devices in the Real Device Cloud when an emulator is not enough.
Mark as Bug
Flag UI issues instantly and share them with your team without leaving the session.
IP Geolocation
Load your site from 170+ countries to check regional redirects, pricing, and content. Available on paid plans.
Visual Comparison
Compare screenshots across browsers with SmartUI, which flags layout shifts and pixel-level changes between them.
Session Recording
Record the session as video so developers can watch the bug happen on the exact browser, version, and OS.
Some Love from our Customers
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With support from Tenny Agustin, our Engineering Operations Lead, we modernized our approach with
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More Reasons to Love TestMu AI (formerly LambdaTest)
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As Seen On
Customer Stories on Testing Websites Across Browsers
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
Frequently Asked Questions About Testing Websites on Different Browsers
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