Product DevelopmentSizzy
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Sizzy

Sizzy

The browser for web developers

Before Sizzy: web development is stressing you out, responsive design is hard, you have an overwhelming amount of opened tabs and apps. After Sizzy: all the tools you need are in one place, responsive design is a breeze, no more context switching.

About Sizzy

Sizzy is the ultimate browser for web developers, providing a comprehensive set of tools to streamline the development process and make responsive design a breeze. With Sizzy, developers can test their websites on multiple devices and under various conditions simultaneously, eliminating the need for countless open tabs and apps. Sizzy offers a range of intuitive features that allow developers to investigate and resolve visual bugs quickly and efficiently. Its customizable layouts and comprehensive screenshot and recording capabilities ensure that design presentations always look polished and professional. Whether working on a single project or juggling multiple ones, Sizzy makes context switching seamless and intuitive. By saving all data and configurations with each project, developers can pick up right where they left off, minimizing downtime and maximizing productivity. Sizzy represents a modern workflow for web development, much like how CI/CD has revolutionized deploying sites via FTP. Once experienced, developers will never want to return to using regular browsers for their work. Sizzy is the missing tool that web developers have been waiting for, empowering them to focus on their products and ideas while leaving the stress of responsive design behind.

  • A/B Testing

    Sizzy provides a way for A/B testing within the tool, allowing access to device details for conditional logic and testing. Debug logic can be isolated to Sizzy, avoiding user exposure.

  • API Inspector

    The API Inspector panel in Sizzy helps monitor, test, and troubleshoot APIs efficiently. It supports REST, GraphQL, and form requests with well-formatted responses.

  • Butler Workflows

    Sizzy's Butler feature speeds up daily tasks with commands for color formats, string operations, npm searches, and more.

  • Butler

    Sizzy's Butler feature enables command triggering via shortcuts for various tasks within the tool.

  • Color Scheme

    Sizzy allows testing components for light and dark themes to ensure compatibility.

  • console.log for CSS

    Sizzy enables logging CSS information by adding custom class names to elements, enhancing debugging.

  • Console

    Sizzy's console aggregates logs from all devices, offering improved filtering compared to Devtools console.

  • Cookies Editor

    Sizzy's cookies editor simplifies viewing and editing page cookies without navigating through Devtools.

  • CSS Overrides

    Sizzy supports custom CSS styles for all devices and individual elements, facilitating experimentation and quick editing.

  • Custom Debugging Panel Tabs

    Sizzy allows pinning websites as panels in the Debugging Panel for easy access to tools like Storybook and GraphQL Playground.

  • Custom Headers

    Sizzy enables defining and toggling custom request headers for specific needs.

  • Debug Styles

    Sizzy offers various debugging tools, including z-index visualization and custom debugging classes.

  • Debugging Panel

    Sizzy's Debugging Panel provides essential features for app debugging, enhancing the development process.

  • Design Mode

    Sizzy's design mode allows quick edits on pages without direct code manipulation.

  • Device Simulation

    Sizzy facilitates convenient website simulation with various scenarios like color schemes, network speed, and more.

  • Disable Navigation Sync

    Sizzy allows disabling navigation sync for individual device navigation stacks.

  • Enable CORS

    Sizzy allows enabling CORS requests for seamless development without browser restrictions.

Platforms supported

  • Windows
  • macOS
  • Linux

Browsers supported

ChromeFirefoxSafariEdge

Developed by

Zekit
Lifetime access
$59

Invest today for a lifetime of access and continuous updates, starting at only $59

What everyone's saying

4.3/5
32 reviews
Seems to be abandoned

I liked Sizzy very much, but there isn't any update since a few months and a lot of people complaining about not responded inquiries, the project seems to be abandoned ... I wrote to the developer and will wait for a few days. If there is no response and he can't provide any good reasons, I will contact AppSumo about a refund.

LarsBurkhardt
Purchased from: AppSumo.com
Abandoned

I was very satisfied with Sizzy until the deal expired. Now, the developer is no longer responding to questions, the product is not being updated, and bugs remain unresolved. The browser engine is quite outdated and doesn't support new CSS rules, like nesting, which makes it unusable for me as a web developer. The roadmap and changelog were last updated several months ago, and there has been silence since then. The annoying bug still exists, where the dev tools always refresh when switching between tabs. The developer is aware of it but no fix so far.

I bought the product in june and never ever got any update for the browser.

Very disappointed - do not buy if it ever comes back.

CuriousPenguin
Purchased from: AppSumo.com
Another wrong purchase on AppSumo

Sizzy has encountered the same problem with many other sellers here on AppSumo lately. A few months after the end of sales (without the possibility of requesting a refund), the application is left to its own devices, with no further updates or support. AppSumo should find a way to curb these scammers.

mickhele
Purchased from: AppSumo.com
Time saver for web developers | Optimizador de tiempo para creadores de sitios web

[English]
The amount of time I save and the ease and speed to see the design errors in my websites are enough to give 5 tacos. Great value for a good price.

[Español]
La cantidad de tiempo que ahorro y la facilidad y rapidez de ver los errores de diseño que tengo en mis webs son más que suficientes para darle 5 tacos. Gran valor por buen precio.

RoberTech
Purchased from: AppSumo.com
Must have for web devs

I know kitze from doing his course of ZeroToShipped. Great guy, always responds and great developer. He is very active on Twitter, if there is any issues, will respond quickly.

This app is great for web devs. I like most the view of different devices when coding, so we can quickly encounter bugs on the frontend. The tool seems to be updated often.

fcristel
Purchased from: AppSumo.com
Ok, but needs an update soon!

Works ok and over the time it was improved BUT, right now needs a quick update fixing the following problems:

- Please Improve the Cookie Editor:
Show all cookies on a page, as in Chrome Developer Tools.

- Optimize Device Simulation:
Make it more fluid and comparable to Hoverify.

- Add Accessibility Functionalities:
Include accessibility testing and disability simulations.

- Incorporate Standard Browser Functionalities:
Add ad blocker, extension support and VPN.

- Reduce Memory Consumption:
Optimize to use fewer resources.

- Resolve Mobile Display Issues:
Ensure elements display correctly in mobile views.

- Improve User Interface and User Experience:
Refine UI and UX to compete with tools like Polypane.

- Professional Responsiveness of the Founding Team:
Improve courtesy and professionalism in responses to users.

- Better Navigation Process between Projects:
Facilitate switching between projects with fewer clicks and greater organization.

Increase Stability:
Prevent errors and bugs during use.

TheGar
Purchased from: AppSumo.com
Web Dev's - This is a MUST HAVE! 🌮🌮🌮🌮🌮

Drop the mic...just buy it. 🌮🌮🌮🌮🌮

Why?
• It will stop you bashing your head against a wall when designing WordPress sites in Elementor
• If you are making pop-ups for PC and mobile, you can see the "Apple Pie" ❤️

Noice work Sizzy

WellStrategic
Purchased from: AppSumo.com
Interessante anche se non superlativa.

Pro:
1. Se hai diversi progetti web con PHP è veramente comoda perché hai un browser che mantiene i tuoi progetti organizzati
2. Simpatica l'interfaccia per avere più dispositivi affiancati contemporaneamente
3. Super comoda la facilità con la quale svuoti la cache

Contro:
Alla fine buona parte delle cose puoi farle con Firefox e pochi plugin gratuiti

105301861576877060573
Purchased from: AppSumo.com
Has potential and some really cool features.

I like the muti-view device view. It really is the USP of this browser.
Overall it is very dev centric which is cool. It's like an F12 dev mode with super-powers.

However, as a browser on its own, it is quite basic. Next to zero built-in features that a lot of other browsers have come to have as standard nowadays. Ad-block, extension support, VPN, or the subtle things. It feels a bit raw in its current state. That's not to say these won't be added later though.

I think it is fair to say that, at this point at least, this is not a browser replacement for your daily driver. It is a secondary tool to get focused dev work done.

I did refund this one this time, just because I don't feel I need it in my work. I do recognise the effort this must have taken to make, and appreciate the opportunity to give it a good go. I wish the Sizzy dev team the best in making it even better in the future.

rick46
Purchased from: AppSumo.com
Cookies Editor not working

This sounded like a great tool, but unfortunately, one feature I was excited about, the Cookies Editor, does not work well. For some reason, when I have it display what cookies are on a page, it only displays some of them. If I go to Chrome Developer Tools, I can see them all.

Additionally, I found the Device Simulation a little clunkier than what I currently use, which is Hoverify. Hoverify allows me to launch directly from the browser instead of having to open another application.

Fezziwig
Purchased from: AppSumo.com
Just great

This is a very useful tool to have at so many levels. One reviewer wrote that the lack of extensions is terrible. I disagree. You can still use chrome if you need specific extensions.
With what is has out of the box, Sizzy is excellent. Well made, well thought out, polished. It's a gem.I use it not only for responsive testing and coding-related tasks (it allowed me to find a nasty bug that escaped us for quite a time); but I also use it for other stuff such as dealing with various accounts (such as gmail) and splitting views of the same app on one screen.It's similar to the way I work with Nova on MacOS. The possibility to use different user sessions is cool. I really like the philosophy : qr code for local testing on real mobile, URL editor with parameters, page navigator, a useful style inspector, an API inspector and so on. This is absolutely one of the best products I have ever bought on AppSumo and a no brainer at this price point.

Vuk
Purchased from: AppSumo.com
A Powerful Tool for Responsive Web Design

Sizzy is an outstanding tool for testing website appearances across a wide range of devices, from smartphones and tablets to various monitor and laptop screen sizes. It has significantly simplified and accelerated my work in developing responsive web designs. The investment in Sizzy has proven to be money well spent, as it has enhanced my efficiency and effectiveness. I highly recommend Sizzy to anyone involved in web design and development!

Urgul
Purchased from: AppSumo.com
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