Software Alternatives, Accelerators & Startups

QuickJS VS Ultralight

Compare QuickJS VS Ultralight and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

QuickJS logo QuickJS

Application and Data, Build, Test, Deploy, and JavaScript Compilers

Ultralight logo Ultralight

Fast, light HTML UI solution for C++ apps
  • QuickJS Landing page
    Landing page //
    2021-08-20
  • Ultralight Landing page
    Landing page //
    2021-07-25

QuickJS features and specs

  • Lightweight
    QuickJS is designed to be lightweight with a small footprint, making it easy to embed in applications and suitable for resource-constrained environments.
  • Fast Startup Time
    QuickJS offers very fast startup times, which can be beneficial for applications that require quick script execution without a long initialization period.
  • Full ES2020 Support
    QuickJS supports the full ES2020 specification, providing modern JavaScript features and syntax, which is advantageous for developers who want to use the latest JavaScript features.
  • Embeddability
    Being easy to integrate into other applications or systems, QuickJS provides a simple C API, which facilitates embedding it in various software and platforms.
  • Single File Distribution
    QuickJS can be distributed as a single file, simplifying packaging and distribution without needing external dependencies.
  • Memory Efficiency
    Its memory efficient design allows QuickJS to run scripts in environments with limited memory resources, making it suitable for IoT devices and embedded systems.

Possible disadvantages of QuickJS

  • Limited Ecosystem
    QuickJS, being a relatively new and niche project, has a smaller ecosystem compared to more established JavaScript engines like V8, which means fewer libraries and community resources are available.
  • Performance
    While QuickJS is efficient, it may not deliver the same high-performance execution as more mature engines like V8, especially in applications requiring intensive computational processing.
  • Lack of Long-term Support
    QuickJS may not have the same level of long-term support and ongoing development as larger projects maintained by large companies or communities.
  • Single-threaded
    QuickJS runs in a single thread, which can be a limitation for applications that require multithreading support for parallel processing.
  • Limited Debugging Tools
    Compared to more popular JavaScript engines, QuickJS has fewer debugging tools and integrations, which might make development and troubleshooting more challenging.

Ultralight features and specs

  • Lightweight
    Ultralight is designed to be extremely lightweight, making it ideal for applications where performance and resource usage are critical.
  • Cross-Platform
    The software is built to work across different operating systems, allowing developers to create applications that can run on multiple platforms without significant changes.
  • High Performance
    Ultralight includes optimizations for speed and efficiency, which can enhance the performance of any application using it.

Possible disadvantages of Ultralight

  • Limited Features
    Compared to full-feature browsers or rendering engines, Ultralight might lack certain advanced features or capabilities.
  • Smaller Community
    Being a less mainstream option, Ultralight might have a smaller community, which can impact the availability of community-driven support and resources.
  • Potential Compatibility Issues
    Due to its lightweight nature, some complex web technologies or scripts might not be fully supported, leading to potential compatibility issues.

QuickJS videos

QuickJS - IO, axios, redaxios, fetch

Ultralight videos

GTA Ultralight Review

More videos:

  • Review - Alpha-Z1, Ultralight & Havok review! - GTA Online
  • Review - E234 Our Ultralight "Stealth" Glider Customization & Review! - Lets Play GTA 5 Online PC 60fps

Category Popularity

0-100% (relative to QuickJS and Ultralight)
Application And Data
100 100%
0% 0
Development Tools
26 26%
74% 74
Rapid Application Development
Design Tools
100 100%
0% 0

User comments

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Social recommendations and mentions

QuickJS might be a bit more popular than Ultralight. We know about 46 links to it since March 2021 and only 34 links to Ultralight. 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.

QuickJS mentions (46)

  • Vim 9.2 Released
    You don't need V8 for running JS for scripting, you have quickjs[1] or mquickjs[2] for example. You might have problems importing npm packages, but as we can see from lua plugins you don't even need support for package managers. Performance is not as good as luajit, but it is good enough [1]: https://bellard.org/quickjs/ [2]: https://github.com/bellard/mquickjs. - Source: Hacker News / 5 months ago
  • Fabrice Bellard Releases MicroQuickJS
    - QuickJS: https://bellard.org/quickjs/ Legendary. - Source: Hacker News / 7 months ago
  • Building a JavaScript Runtime from Scratch using C
    For those who would like a true "from scratch" implementation of JavaScript, Fabrice Bellard's QuickJS [1] is clean, readable and approachable. It's a full implementation of modern JavaScript in a straightforward project, not nearly as complex or difficult as V8. [1] https://bellard.org/quickjs/. - Source: Hacker News / 9 months ago
  • The many, many, many JavaScript runtimes of the last decade
    I see a few mentions of QuickJS, but they all refer to the fork of Bellard's QuickJS https://bellard.org/quickjs/, which I think deserves a mention. It seems to be still active (last release 2025-04-26, GitHub mirror at https://github.com/bellard/quickjs shows some activity). - Source: Hacker News / 12 months ago
  • SQLite JavaScript: Extend your database with JavaScript
    This is a fantastic approach. BTW, it looks like the js engine is "QuickJS" [0]. (I'm not familiar with it myself.) I like it because sqlite by itself lacks a host language. (e.g., Oracle's plsql, Postgreses pgplsql, Sqlserver's t-sql, etc). That is: code that runs on compute that is local to your storage. That's a nice flexible design -- you can choose whatever language you want. But quite typically you... - Source: Hacker News / about 1 year ago
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Ultralight mentions (34)

  • Breaking the WASM/JS communication performance barrier
    > I see. It's a new rendering engine, not "Blink/WebKit/etc." Correct > Am I right that WebKit does not support what you and I are discussing equivalent wise? Passing structs or "binary" events? I'm not sure. If I wanted to do this I'd probably look into https://ultralig.ht/ which is a commercial fork of webkit. See: https://docs.ultralig.ht/docs/calling-a-c-function-from-js. - Source: Hacker News / 12 months ago
  • Lightpanda: The headless browser designed for AI and automation
    Another browser in this space is https://ultralig.ht/, it's geared for in-game UI but I wonder how easy it would be to retool it for a similar use case. - Source: Hacker News / over 1 year ago
  • Verso โ€“ web browser built on top of the Servo web engine
    All mainstream web browsers are bloated and use a lot of resources. I am looking for a tiny lightweight web browser with good HTML5 support but without bloat for older computers. Servo, Ladybird and Ultralight (https://ultralig.ht) are promising. I even started developing Qt Ultralight Browser. - Source: Hacker News / almost 2 years ago
  • Ode to the M1
    What I'd really like to see with CEF et al, is JS being dropped, in favor of directly controlling the DOM from the host language. Then we could, for example, write a Rust (or Kotlin, Zig, Haskell, etc) desktop application that simply directly manipulated the DOM, and had it rendered by a HTML+CSS layout engine. Folks could then write a React-like framework for that language (to help render & re-render the DOM in... - Source: Hacker News / almost 3 years ago
  • Ode to the M1
    > I hope Electron/CEF die soon, and people get back to building applications that don't consume hundreds of megabytes of RAM to render a hello world. Web technologies are fine, but what we really need is some kind of lightweight browser which allows you to use HTML/CSS/JS, but with far lower memory usage. I found https://ultralig.ht/ which seems to be exactly what I am looking... - Source: Hacker News / almost 3 years ago
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What are some alternatives?

When comparing QuickJS and Ultralight, you can also consider the following products

Sciter - Embeddable HTML/CSS/script engine

nuitka - Nuitka is a Python compiler.

Priime - Edit photos with the styles of the world's top photographers. Smart suggestions, fast editing, and inspiring collections.

DaisyUI - Free UI components plugin for Tailwind CSS

Dark Room - A quick, powerful photo editor that gives you control

Extism - Extism is the open source, universal plug-in system. Extend all the software everywhere! Powered by WebAssembly.