
Polypane
Responsively
Sizzy
LT Browser by Lambdatest
browserling
BrowserStack
Google Chrome
TestMu AI (Formerly LambdaTest)
MobileView.app
Sizzy
Responsively
BrowserStack
Responsinator
U-Eyes: Mobile Device Simulator
Developing and designing just got easier. The most powerful browser for web developers. Available on all platforms.
Polypane shows your site in multiple viewports at once and keeps them all in sync while you work.
Develop responsive websites and apps twice as fast and get better results, because you wont be skipping screen sizes and wishing for the best.
Build higher quality websites, whether you use Wordpress, React, Angular, Svelte, Bootstrap, Drupal or any other CMS, library or framework.
Polypane has the right tools built-in for developing, debugging and testing, like devtools extensions, live reloading, accessibility testing and more.
Mobile View is a free Chrome extension that overlays a real device frame on top of any live page, so you can see the desktop and mobile (or tablet) layout at the same time, in the same tab. Scrolling, clicks and typing stay in sync between the two views.
It's built for responsive web design work: preview a site across different phones and tablets without leaving the page, take clean device-framed screenshots for clients, portfolios or a GitHub README, and record the screen to show a layout in action.
Everything runs locally in the browser โ no servers, no analytics inside the extension, no tracking.
Polypane
MobileView.appPolypane is particularly recommended for web developers, front-end developers, UX/UI designers, and accessibility specialists who require an integrated environment for testing different screen sizes, resolutions, and accessibility features in a cohesive manner.
MobileView.app's answer:
It's a Chrome extension (Manifest V3) built with vanilla JavaScript, HTML and CSS using the Chrome extension APIs. Screen recording uses the browser's native capture and WebCodecs APIs. The website is a static site.
MobileView.app's answer:
Web developers, front-end developers and designers who work with responsive layouts every day โ plus freelancers showing work to clients, and anyone building a portfolio or GitHub README that needs clean device-framed screenshots.
MobileView.app's answer:
Most tools make you switch between desktop and mobile views. Mobile View shows both at the same time, in the same tab โ a real device frame sits on top of the live page, and scrolling, clicks and typing stay in sync between the desktop layout and the device preview. It's a lightweight browser extension rather than a separate app or paid cloud service, and everything runs locally with no tracking.
MobileView.app's answer:
I'm a full-stack web developer, and I kept hitting the same friction: checking how a site looked on mobile while building the desktop version, and explaining responsive behaviour to clients over a call. Existing options either hid the desktop layout or felt clumsy, so I built the tool I wanted for myself โ and turned it into a free extension when other developers kept asking about it.
MobileView.app's answer:
It's free, installs in one click, and works directly on any live page โ no separate app, account, or cloud service. You get desktop and mobile side by side with synced interaction, clean device-framed screenshots, and screen recording for client demos, all locally in your browser with no analytics or tracking.
Based on our record, Polypane seems to be more popular. It has been mentiond 40 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
The point isn't showing what they look like, it's that the result is randomized. Screenshots aren't, so that kind of defeats the purpose. The article starts with instructions on how to actually see and interact with the demos (the easiest is to use [Polypane](https://polypane.app)), as well as a video showing all the demos from the article running in Polypane. - Source: Hacker News / about 1 month ago
We also need to talk about Source Order vs. Tab Orderโtheyโre more different than youโd expect ๐. Source Order is the sequence of nxodes inside their parent in the DOM. Tab Order is the sequence of focusable nodes navigated using the Tab key. If a focusable element lacks tabindex, it follows a depth-first traversal of Source Order (visualized conceptually as a traversal path). Want to visualize Source Order?... - Source: dev.to / about 1 year ago
URL: https://polypane.app What it does: A browser tailored for developers, enabling real-time testing and previewing of responsive designs. Why it's great: Test your site on multiple screen sizes simultaneously for smoother cross-device optimization. - Source: dev.to / over 1 year ago
That's pretty cool! Get ready to keep these up to date monthly or become obsolete quickly. One of the downsides of tools like this is that your URL needs to be available online so if there's an issue, your iteration loop is quite long. In Polypane [1] I've built social media previews that work with any local URL but also let you overwrite that URL for the social media that display those. I built (and frequently... - Source: Hacker News / almost 2 years ago
The address bar in Polypane can match URLs and page titles based on fragments. So you can type po blo 20 to get to e.g. https://polypane.app/blog/polypane-20-browser-features-and-performance/. - Source: dev.to / about 2 years ago
Responsively - Develop responsive web-apps 5x faster!
Sizzy - The browser for designers and developers
LT Browser by Lambdatest - LT Browser is a free dev friendly browser for developers and testers. You can see mobile view of website on different screen sizes and resolution on 50+ pre installed view ports. You can build, test and debug your website faster then ever.
BrowserStack - BrowserStack is a software testing platform for developers to comprehensively test websites and mobile applications for quality.
browserling - Live interactive cross-browser testing from your browser.
Responsinator - Designed to test responsive websites on different devices.