- Cross browser testing tools at a glance
- Ten cross browser testing tools to try
- Which testing tool matches your team
- Which browsers to test in first
- Manual checks versus automated tests
- Questions to ask before you choose a testing tool
- Signs your site needs cross browser testing
- My plain advice on choosing a cross browser testing tool
- Frequently asked questions
The best cross browser testing tools show you how your website looks and behaves in different browsers, operating systems and screen sizes, so you can fix problems before visitors find them. Some are cloud platforms with real devices, some are desktop browsers for developers, and others add visual AI. Ten options follow in no particular order.
Your website might look perfect in the browser you use every day and fall apart in someone else's. A menu that won't open on an older phone, a form button pushed off screen on a tablet, a font that never loads in one browser: every one of those loses you enquiries, and you'd never know unless you checked.
The ten cross browser testing tools below are listed alphabetically and in no particular order, and every description comes from the tool's own website, read this week. If browser choice is on your mind generally, my guide to whether one privacy-focused browser is safe covers the visitor's side.
Cross browser testing tools at a glance
I checked the free plan column on each tool's own website, as of Oct 2026. Yes means the site names a free plan, a free version, a free allowance or an open source version. Trial only means a time-limited trial. Not stated means the pages I read named neither, even where there's a button inviting you to start for free, so check the vendor's page before you sign up.
| Tool | Type | Good for | Free plan |
|---|---|---|---|
| Applitools | AI visual testing platform | Catching visual bugs across browsers | Trial only |
| BitBar | Device and browser testing cloud | Live and automated tests without a lab | Trial only |
| Browserling | Live online cross-browser testing | Quick live checks in seconds | Yes |
| BrowserStack | App and browser testing platform | Testing on real browsers and devices | Not stated |
| Ghost Inspector | Codeless automated browser testing | Teams new to automated testing | Trial only |
| Polypane | Browser for web developers | Seeing every screen size at once | Trial only |
| Responsively App | Free, open source developer browser | Responsive design checks on your desktop | Yes |
| Sauce Labs | Cross browser, mobile and AI testing | Large teams running test automation | Not stated |
| TestingBot | Cross browser and mobile app testing | Automated and manual tests on real browsers | Not stated |
| TestMu AI | Agentic testing platform (formerly LambdaTest) | Browser testing plus AI testing agents | Not stated |
Ten cross browser testing tools to try
Applitools
Best for: QA teams who want visual AI to catch layout bugs across browsers, with test orchestration and self-healing tests in the same platform.
BitBar
Best for: Teams who want one cloud for device and browser testing, with live and automated testing and no lab of their own to maintain.
Browserling
Best for: Freelancers and small agencies who want to open a real browser and start testing a page live within seconds, not just view screenshots.
BrowserStack
Best for: Development teams who want to test websites and web apps on real browsers and mobile apps on real devices from one platform.
Ghost Inspector
Best for: Product managers and testers new to automation who want codeless browser tests for websites and web apps, running on a schedule.
Polypane
Best for: Front-end developers who want every viewport in one window, with clicks and scrolls synced so they test once instead of device by device.
Responsively App
Best for: Web developers who want a free, open source desktop browser for previewing responsive layouts on several screens side by side.
Sauce Labs
Best for: Engineering teams that want cross browser and mobile test automation at scale, with AI help for writing test cases.
TestingBot
Best for: Smaller QA teams who want automated, manual and visual tests on thousands of real browsers and devices from a smaller provider.
TestMu AI
Best for: Teams who want cross browser testing alongside AI testing agents for web, mobile and voice apps in one platform.
Which testing tool matches your team
- Real browsers and devices in the cloud: BrowserStack, TestingBot or BitBar.
- Quick live checks in seconds: Browserling.
- Seeing every screen size in one window: Polypane or Responsively App.
- Automated tests without writing code: Ghost Inspector.
- Catching visual layout bugs with AI: Applitools.
- Large-scale test automation: Sauce Labs.
- Browser testing alongside AI testing agents: TestMu AI.
Which browsers to test in first
The GOV.UK Service Manual publishes a list of browsers that government services should be tested in, covering Chrome, Safari, Edge, Firefox and Samsung Internet across iOS, Android, Windows and macOS. It says that list represents approximately 98% of the most popular browsers used on GOV.UK.
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Your own audience may look different, so check your analytics before you settle on a list. But if you're starting from nothing, a published list from a site with that much traffic is a sensible place to begin.
Manual checks versus automated tests
Manual testing means opening your site in a browser and clicking through it yourself. It's quick to start and it catches the things that feel wrong, such as awkward layouts or slow pages.
Automated testing runs scripted checks on a schedule, across many browsers at once. It takes longer to set up, but it catches problems after every update without anyone remembering to look.
Questions to ask before you choose a testing tool
- Does it use real devices or emulated ones?
- Which browsers and versions does it cover?
- Can I test pages that aren't public yet?
- Does it support the test framework my developers use?
- Can it spot visual differences automatically?
- How many tests can run at the same time?
Signs your site needs cross browser testing
- Enquiries dropped after a redesign. Check your forms on every browser.
- Customers report a broken menu. Test on their device.
- Mobile visitors leave quickly. Check small screens.
- You only ever check in one browser. Widen your testing.
Do you make a cross browser or website testing tool? Tool makers can ask to be considered for a featured place on this list.
My plain advice on choosing a cross browser testing tool
Begin with manual checks on the four or five browsers your analytics say matter most, then add automation once your site changes often enough that you can't keep up by hand. Plenty of small businesses never need more than that first step.
Test your contact form and checkout on a phone every time you update the site, because those are the pages that lose you sales when they break. If you're weighing up a new browser for your own work, my roundup of alternatives to one popular browser might help.
Frequently asked questions
What is cross browser testing?
Cross browser testing means checking that a website looks and works correctly in different browsers, devices and screen sizes.
Are there free cross browser testing tools?
Some offer free plans or open source versions, and others offer trials. The free plan column above shows what each tool's site says.
Which browsers should I test my website in?
Start with the browsers your analytics show visitors using. The GOV.UK Service Manual's list is a useful benchmark if you have no data yet.
Do I need real devices for testing?
Real devices catch problems that emulators can miss, especially on phones. Many cloud tools offer both.
Can I automate cross browser testing?
Yes. Automated tools run scripted checks across many browsers on a schedule or after every update.
How often should I test my website?
Test after every significant change, and check key pages such as forms and checkout regularly.
