Sizzy is the tool of choice for category leading and fast growing companies
Recently migrated a site from global sass to css modules and just having the current production page and the development one next to each other with click & scroll sync is seriously a killer feature within @sizzyapp. Can really recommend it!
Tim (@cstrnt)
Sizzy is a powerful selling tool. When we have a prospect who doesn't have a responsive site, when we show them their site on Sizzy, they are impressed and we look even more professional.
Eric Dingler, Owner @ In Transit Studios
I use Sizzy to develop all my apps. Love projects feature, because I always have to switch between 3-4 projects. I enjoy overlay DevTools mode it helps me to easily debug my apps.
As a UX/UI Designer Sizzy helps me test the designs I receive from developers and save time testing on different layouts/screen sizes. Also, I can experiment with html/css directly and get back with very specific feedback to them.
Manolis Papadakis, Software Engineer at NVIDIA
It’s the bread to my web dev butter. I won’t shut up about it. I’m happy to show it off. I paid for it monthly when I had no job. It sped up how much ground I could cover for different devices compared to chrome dev tools.
It helps a lot with responsive web dev. I like how I can individually inspect element and grab screenshots of multiple devices. It's been fairly instrumental to quickening my workflow and spotting issues before test.
Engineer at Salaso


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If you aren't using @sizzyapp to test your web projects, you've goofed. This app saves me so much time manually resizing windows and toggling dev tool settings - plus, synchronized scrolling is straight magic 🧙‍♂️
Just bought a lifetime license to @thekitze's because it seems like a MUCH better dev browser than Chrome/Brave/etc. for typical development. Especially looking forward to "sessions" allowing me to easily be logged in as different users simultaneously :)
Big tip if you are in Switch to @sizzyapp as your browser for development. It is incredible for UI work and also for social previews. It does a lot of stuff I most likely don't know it does but will learn soon. Thx @thekitze
I’ve said this before, but... @tailwindui with @sizzyapp is life changing. You can actually tweak a design without getting a headache.
Before @sizzyapp: Damn, I forgot to test this on smaller screen sizes. *installed Sizzy* Now: Wow, looks great on all screen sizes! Let's push this to production! 🚀 Get it now:
I haven't used @sizzyapp in a while and I just installed in on my new machine and fired it up. Holy crap! 🤯 It was already an awesome tool, but it's gotten so much better! So nice!
I know @sizzyapp for a long time now. But I never thought owning a license would make me so happy. Just the social card preview would have saved me a ton of time. And that's just one tiny feature Sizzy has to offer.
I just bought a lifetime subscription to @sizzyapp. I love the thought that was put into this product. It's so good. One of my must-have tools as a developer.
Can't state enough how having two devices side by side with different user account sessions and see them both update in @sizzyapp make it so much easier than switching between different incognito tabs/browsers
I feel like @sizzyapp doesn't get enough love. It's an incredible app for web development. And only $7/mo it pays for itself many times over.
Damn this looks like an incredibly useful browser for testing websites at multiple screen sizes.
The @sizzyapp made my life a lot easier with web development, it's just incredible.
I‘ve just purchased @sizzyapp - one of the best dev tools ever! 😍 Every cent worth the money!
Periodic reminder that @sizzyapp is one of my favourite design tools and you should definitely get it.
Now that I'm in @sizzyapp daily I can't imagine testing without it 🥰 I'd personally refund 1 month (+ 2 wk trial) if you don't love Support @thekitze making you a more 🤑
Wonderful tool for testing our responsive websites & apps. @sizzyapp
@thekitze I have been underusing @sizzyapp 😱. Just discovered the URL editor, projects and reference browser. The reference browser really stood out for me because I always have to do research on another browser. @sizzyapp is amazing.
Super excited to tell you folks that the @ChakraTemplates redesigned website is almost done! I'm doing some testing with @sizzyapp and I love it ❤️ The website redesign comes with 3 new gorgeous Hero components designed by me 🤩 Everything's done with @chakra_ui! Stay tuned! 🙌
Who else is enjoying the new @sizzyapp UI design? It's just minimalist and sexy!
I'm finally getting around to learning @sizzyapp almost 1 whole year after buying it 💸 And WOW. Apart from @code it's the single most essential web dev tool you should learn. It's that FUCKING good! @thekitze recorded a 3½ hour whirlwind of every feature and how he uses it 👇🏼
Thank you @sizzyapp for making my life easier.
I've been using @sizzyapp for the past couple of days and damn, it feels good 💖 writing CSS doesn't make my blood boil anymore and testing changes in chrome feels like pounding nails with a screwdriver
well @sizzyapp is pretty damn excellent if you're doing web dev
If anyone designs, tests and audits websites... @sizzyapp is just amazing... You can test a site or app across loads of devices/browsers in one click and I'm really liking its pricing structure
Every single time I need to do responsive design work, I'm thankful for @sizzyapp I also notice a lot of new features, thanks for the continous development.
False 🙊 @sizzyapp is definitively THE incredibly useful browser … for EVERY-damn-(web-dev)-thing 🏆
@devinDford @brave I recently found @sizzyapp and I'm LOVING IT for responsive development. Otherwise, my primary browser is Brave for everything.
@rymawby @bubble @sizzyapp 100% Best dev browser around.
@akshitarora0907 @eddiejaoude @sizzyapp is perfect for cross browser testing in general. It’s the closest you’ll get to a real device or browser experience, plus so many helpful features
Super cool. With @sizzyapp project feature, switching between the live and development URL on a project is just amazing!
Thanks @sizzyapp for M1 native app. Now the sizzy opens in a jiffy with much less battery impact on new mac chip. Have had some issue but we are sure that those will be resolved soon. Sizzy is great for
Absolutely loving @sizzyapp - officially my new fave dev tool!
Just discovered and tested @sizzyapp 😍 It has been love at first sight! If you're a web developer you HAVE TO try it! Responsiveness has never been that easy!
If you are a developer and you open localhost in your daily work, you are wasting time if you are using any other browser than @sizzyapp
Really a big fan of @sizzyapp's session manager. I can quickly move between a @sails_casts subscriber, a login user that's not subscribed yet and a guest user. Just amazing!
@sizzyapp is one of the best tools I use daily. Thanks !!!
One of my favourite tools to use when working with responsive design is @sizzyapp. Having a website displayed on different devices at the same time is very useful and time saving.
Finally gave @sizzyapp a try in a mobile-first side project last night and it *absolutely slaps*. Good stuff!


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