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Svelte VS Sizzy

Compare Svelte VS Sizzy and see what are their differences

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Svelte logo Svelte

Cybernetically enhanced web apps

Sizzy logo Sizzy

The browser for designers and developers
  • Svelte Landing page
    Landing page //
    2023-07-27

We recommend LibHunt Svelte for discovery and comparisons of trending Svelte projects.

  • Sizzy Landing page
    Landing page //
    2023-04-23

Svelte features and specs

  • Performance
    Svelte shifts much of the work from runtime to compile time, resulting in faster and more efficient web applications. By compiling components to highly optimized vanilla JavaScript, it reduces the overhead and boosts performance.
  • File Size
    Due to its compile-time nature, Svelte produces smaller bundle sizes compared to other frontend frameworks like React or Angular, which can significantly improve load times and performance.
  • Simplicity
    The framework is designed to be more accessible and easier to understand. Svelte’s syntax is clean and straightforward, allowing developers to get up and running quickly with minimal boilerplate.
  • Reactivity
    Svelte provides a simple and intuitive way to handle reactivity by using built-in language constructs like assignments. This means no complicated state management libraries are necessary for many use cases.
  • Less Boilerplate
    Svelte reduces the boilerplate code typically required in other frameworks, resulting in a cleaner and more maintainable codebase. This can help accelerate development and reduce bugs.
  • Reactive Programming
    SvelteKit leverages Svelte's reactive programming model, allowing developers to write less code while achieving better functionality through automatic reactivity.
  • Integrated Router
    SvelteKit includes a built-in router, which simplifies the creation of multi-page applications and enables easy setup of dynamic routes.
  • SSR and SSG
    SvelteKit supports Server-Side Rendering (SSR) and Static Site Generation (SSG) out of the box, giving developers flexibility in how they build and deploy their applications.
  • Opinionated but Flexible
    While SvelteKit provides an opinionated setup to streamline the development process, it also allows for customization to fit a developer’s specific needs.

Possible disadvantages of Svelte

  • Ecosystem Maturity
    Svelte’s ecosystem is not as mature or extensive as React’s or Angular’s. There are fewer third-party libraries, tools, and resources available, which might make it more challenging to find solutions for less common problems.
  • Learning Curve
    While Svelte itself is simpler, its approach is quite different from traditional frameworks like React and Angular. This can require a mental shift and time to learn new paradigms, especially for developers coming from those backgrounds.
  • Community Support
    Given that Svelte has a smaller user base and community compared to more established frameworks, finding community support, tutorials, and best practices can sometimes be more difficult.
  • Tooling
    While Svelte has good official tooling and support, it may lack some of the advanced tools and integrations available for other frameworks, which can slow down development for more complex applications.
  • SEO and SSR
    Although Svelte has options for server-side rendering (SSR) and improving SEO, handling these aspects is not as out-of-the-box or mature compared to frameworks like Next.js for React.
  • Community Size
    SvelteKit has a smaller community compared to other frameworks, which can affect the availability of online resources, tutorials, and community-driven support.
  • Tooling and Integration
    Some commonly used development tools and integrations may not be fully compatible with SvelteKit, necessitating workarounds or additional configuration.
  • Frequent Updates
    As a newer framework, SvelteKit undergoes frequent updates and changes, which can sometimes lead to breaking changes or require developers to frequently update their knowledge and projects.
  • Market Adoption
    SvelteKit is less adopted in the industry compared to other frameworks, which might make it a less attractive option for companies looking for widely recognized and vetted solutions.

Sizzy features and specs

  • Browser Synchronization
    Sizzy allows developers to test their web applications simultaneously across multiple devices and viewports, keeping them in sync with one another. This feature helps ensure a consistent user experience across different devices.
  • Development Tools Integration
    Sizzy provides seamless integration with popular web development tools and browsers, making it easier for developers to debug and test their applications without switching between different environments.
  • Customizable Viewports
    Users can customize the viewport sizes to match various devices. This flexibility helps developers test how their application looks and behaves on a wide range of screens and resolutions.
  • Live Reload
    The live reload feature automatically updates the view as developers make changes to the code, improving development speed and reducing the time spent on manual refreshes.
  • Collaboration Features
    Sizzy offers collaboration features that allow teams to share their screen setups and sync states with team members, improving communication and feedback during the development process.

Possible disadvantages of Sizzy

  • Subscription Cost
    Sizzy operates on a subscription-based pricing model, which might be a barrier for individual developers or small teams with limited budgets.
  • System Resource Intensive
    Running multiple viewports simultaneously can be resource-intensive and may slow down the development machine, especially if it lacks robust hardware specifications.
  • Learning Curve
    New users might encounter a learning curve to fully utilize all the features Sizzy offers, particularly if they are accustomed to traditional development environments.
  • Dependency on Internet Connection
    Some features of Sizzy may require an active internet connection. This dependency could be a limitation in environments with unstable or limited internet access.
  • Limited Offline Capabilities
    Sizzy's functionality is somewhat limited when offline, reducing its effectiveness for developers who prefer or need to work in environments with intermittent internet access.

Analysis of Svelte

Overall verdict

  • Svelte is highly recommended for developers looking for a modern, efficient, and easy-to-learn framework. It provides excellent performance and a great developer experience. Its growing community and ecosystem reinforce its viability as a strong option for new projects.

Why this product is good

  • Svelte is considered good because it offers a unique approach to building user interfaces. Unlike other frameworks, Svelte shifts the work from the browser to the build step, compiling components into efficient vanilla JavaScript at build time. This results in faster performance and smaller bundle sizes. Additionally, Svelte's reactivity model is straightforward and intuitive, leading to more maintainable code. Its syntax is easy to learn and helps in building applications quickly.

Recommended for

  • Developers seeking a lightweight and performant alternative to React or Vue.
  • Projects where bundle size and speed are critical.
  • Developers new to front-end frameworks due to its simplicity and ease of learning.
  • Rapid prototyping and single-page applications.

Analysis of Sizzy

Overall verdict

  • Sizzy is considered to be a beneficial tool for web developers due to its convenience and wide range of features tailored specifically to enhance the development experience. However, the final verdict may depend on individual needs and preferences, including the specific features one seeks in a development tool.

Why this product is good

  • Sizzy is a browser specifically designed for web developers to test their projects. It offers features such as simultaneous multi-device viewing, built-in developer tools, responsive design testing, and collaboration features. These features help streamline the development process by allowing developers to easily spot layout issues, test mobile responsiveness, and ensure cross-browser compatibility all in one app.

Recommended for

  • Web developers looking for efficient responsive design testing.
  • Teams who need collaboration features integrated with their development tools.
  • Developers who manage multiple viewports and devices during the web development process.
  • Individuals seeking a centralized tool to streamline web testing and debugging.

Svelte videos

+ Add

SvelteKit Breaking Changes 2022 - My Reactions and What You Need to Know!

More videos:

  • Review - Svelte vs React vs Angular vs Vue
  • Tutorial - SvelteKit Crash Course Tutorial #1 - What is SvelteKit?
  • Review - Why Svelte is the best JS "framework"
  • Review - Oh crap, here comes *another* JavaScript framework || SVELTE || Sveltejs

Sizzy videos

+ Add

Should every Frontend Developer own this software? Checking out 'Sizzy'

More videos:

  • Review - Demo – First impressions of sizzy.app
  • Review - SHADOWHUNTERS | CASTING CLARY & SIZZY

Category Popularity

0-100% (relative to Svelte and Sizzy)

Svelte

Sizzy

Javascript UI Libraries
100 100%
Javascript UI Libraries
0% 0
Developer Tools
79 79%
Developer Tools
21% 21
JavaScript Framework
100 100%
JavaScript Framework
0% 0
Browser Testing
0 0%
Browser Testing
100% 100

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Svelte and Sizzy

Svelte Reviews

Top JavaScript Frameworks in 2025
SvelteJS is a modern JavaScript framework that is useful for building static web apps that are fast, lean, and fun. You can use Svelte to build single, reusable components and large or even small-scale projects. Svelte has started gaining attention because of its ability to produce smaller code bundles that run faster in web browsers.
Source: solguruz.com
Top 10 Next.js Alternatives You Can Try
This web development framework can help you perform the easiest tasks to develop the interface components that users can interact with within their browsers, such as the comment section. Moreover, it has SvelteKit to render the components of the entire page with best practices and developments. You can utilize this platform effortlessly to add basic functionalities and...
Source: www.zegocloud.com
20 Next.js Alternatives Worth Considering
Cruise into the Svelte ecosystem with Sapper, a framework that takes all the brilliance of Svelte and dials it up for app building. It’s like Svelte’s outgoing cousin, optimizing for an even smoother ride from development to go-live.
Source: tms-outsource.com
10 Best Next.js Alternatives to Consider Today
SvelteKit, the official framework for Svelte, streamlines the development of Svelte applications. With an intuitive API, SvelteKit simplifies the creation of server-side rendered (SSR) and statically generated (SSG) applications while retaining the reactive nature that makes Svelte unique. If you're seeking a framework that marries simplicity with powerful capabilities,...
Source: www.saffrontech.net
The 20 Best Laravel Alternatives for Web Development
The next of these Laravel alternatives is Svelte. It cuts through the complexity, snipping off any excess, pre-compiling its magic to keep your app lightweight without shedding any muscle. The end result? Lightning strikes in web performance.
Source: tms-outsource.com

Sizzy Reviews

We have no reviews of Sizzy yet.
Be the first one to post

Social recommendations and mentions

Based on our record, Svelte seems to be a lot more popular than Sizzy. While we know about 391 links to Svelte, we've tracked only 19 mentions of Sizzy. 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.

Svelte mentions (391)

  • Whimsy: a Tiny Game Engine I Made for Storytellers
    Svelte as the main framework. (Whimsy is my first Svelte project, actually! And Svelte didn't disappoint. Almost.). - Source: dev.to / 3 days ago
  • Creating Beautiful User Interfaces With Material Design for Bootstrap 4 & 5 (MDB)
    We're going to build our Svelte application using the Svelte REPL sandbox (or just REPL) at svelte.dev. I recommend checking out all the great documentation at svelte.dev, like its Examples section showcasing Svelte's many features, as well as the cool interactive tutorial at learn.svelte.dev. - Source: dev.to / 3 days ago
  • Plain Vanilla Web – Guide for de-frameworking yourself
    In theory, “de-frameworking yourself” is cool, but in practice, it’ll just lead to you building what effectively is your own ad hoc less battle-tested, probably less secure, and likely less performant de facto framework. I’m not convinced it’s worth it. If you want something à la KISS[0][0], just use Svelte/SvelteKit[1][1]. Nowadays, the primary exception I see to my point here is if your goal is to better... - Source: Hacker News / 15 days ago
  • Why I’m Learning Vue.js After Six Years in React
    When I teased this series on LinkedIn, one comment quipped that Vue’s been around since 2014—“you should’ve learned it by now!”—and they’re not wrong. The JS ecosystem churns out UI libraries like Svelte, Solid, RxJS, and more, each pushing reactivity forward. React’s ubiquity made it my go-to for stability and career momentum. Now I’m ready to revisit new patterns and sharpen my tool-belt. - Source: dev.to / 16 days ago
  • Hyper – Outperform React on every metric
    What is the advantage over Svelte (https://svelte.dev/)? Especially since Svelte is already established and has an ecosystem. - Source: Hacker News / 20 days ago
View more

Sizzy mentions (19)

View more

What are some alternatives?

When comparing Svelte and Sizzy, you can also consider the following products

React - A JavaScript library for building user interfaces

Polypane - The browser for ambitious web developers that want to 5× their quality and efficiency.

Vue.js - Reactive Components for Modern Web Interfaces

browserling - Live interactive cross-browser testing from your browser.

Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.

Sauce Labs - Test mobile or web apps instantly across 700+ browser/OS/device platform combinations - without infrastructure setup.

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