Alternatives to BrowserStack Responsive
A free web tool that previews how a website looks across real device screen sizes. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
BrowserStack Responsive
A free web tool that previews how a website looks across real device screen sizes.
Replacements
Listings that take over the same core job as BrowserStack Responsive.
Responsive Design Checker
A free browser tool that previews a website at mobile, tablet and desktop screen sizes.
Responsive Design Checker previews several screen sizes free in the browser, using simulated viewports and limited to five requests every five minutes.
Screenfly
A free online tool that shows a website at the screen sizes of phones, tablets, desktops and TVs.
Screenfly is free and covers phone, tablet, desktop and TV sizes, but shows resized views rather than rendering on real devices.
LT Browser
A desktop browser for building, testing and debugging responsive websites across many device viewports side by side.
LT Browser is a desktop app for Windows, macOS and Linux with over 50 emulated device presets side by side, working even on iframe-blocking sites.
Am I Responsive
A web tool that shows a site on desktop, laptop, tablet and phone mockups at once.
Am I Responsive shows four Apple-style device mockups in one image, works with localhost URLs, and is meant for screenshots rather than testing.
MobileTest.me
A web tool that previews a website inside smartphone and tablet emulator frames.
MobileTest.me previews sites inside phone and tablet emulator frames for free, though its device list omits current phones.
BrowserStack Live
A cloud service for testing websites by hand in real desktop and mobile browsers on real devices.
BrowserStack Live is a paid service for interactive testing on over 3,500 real browser and device combinations, including local sites.
TestMu AI
A cloud testing platform, formerly LambdaTest, for cross-browser, automated and AI-assisted testing of web apps.
TestMu AI is a freemium cloud platform for cross-browser and automated testing, needing an account and aimed at QA teams.
Also worth comparing
These listings name BrowserStack Responsive as their own alternative, so the relationship runs both ways.
EXPERTE Bulk Mobile Friendly Test
A free online test that checks many pages of a website for mobile-friendliness at once.
BrowserStack Responsive previews one page on real device screens at many sizes instead of giving a bulk verdict, with deeper testing behind BrowserStack's paid plans.
Similar software
Related functionality, not a direct replacement.
Can I use
A searchable web tool with browser support tables for HTML, CSS, JavaScript and other front-end features.
PageSpeed Insights
Google's free web tool that reports Core Web Vitals and Lighthouse results for any URL.
