Slint - The fast and easy UI Toolkit

Benefits

Fluid Create smooth, touch-friendly user interfaces
Cross-Platform Target embedded devices and desktop applications
Multi-Language Intuitive API in your favorite programming language (C++, Rust, JavaScript)
Rapid Design Iterate quickly with Live-Preview

Mission

Slint is a toolkit to efficiently develop fluid graphical user interfaces for any display: embedded devices and desktop applications. We support multiple programming languages, such as Rust, C++, and JavaScript.

Our design goals are:

Straightforward

Programmers and designers should feel productive and be able to enjoy the design and development process. The APIs should be consistent, easy to use, and intuitive, no matter the target language. High-quality documentation should describe the APIs, teach concepts and how to use them.
Lightweight

Fit into a few hundred kilobytes of RAM and require little processing power.
Native

We support many different target platforms, from embedded devices to desktops including mobile and web. Both the user and the developer should feel at home on each platform. The look and feel and experience should match the users' expectations of a native application.

Getting Started

Choose one of our language integrations to get started with Slint:

Rust Browse Documentation
C++ Browse Documentation
NodeJS Browse Documentation
Online Playground
(Beta) Go To Playground

For the best programming experience we recommend installing our Visual Studio Code extension.

Demos

Try one of our demos in the browser, cross-compiled to WebAssembly:

Printer Demo Launch
Slide Puzzle Launch
ToDo App Demos Launch
Widgets Gallery Launch

Check out the Printer Demo running on a Raspberry PI:

Our Offering

We offer three different options for licensing Slint:

Open Source (GPL v3)

Free

For open source applications

Ambassador

Free

Build your own products and help us promote Slint

More Info

Commercial License

Paid-for license

Build your own proprietary products

More Info

Founders

Olivier and Simon started their open source journey in the KDE project, the popular Open Source Desktop Environment for Linux.

Later they met while working together in a small company in Norway called Trolltech, on the Qt C++ toolkit. Here, they gained valuable experience in API design, cross-platform software development and user interface components.

Simon continued in the Qt Company as a lead developer and maintainer of the QtQml engine.

Olivier co-founded Woboq, a software consulting company.

Years later, and now based in Berlin, they are starting a new project. With Slint they aim to make developing user interfaces fun for everyone: from JavaScript, C++, or Rust developers all the way to UI/UX designers.

Blog

Slint Funding & Hiring

May 24, 2022

We're delighted to announce that we've secured funding for SixtyFPS GmbH, the company behind Slint. We've raised a six-digit seed funding to expand our team: For product development, sales, and business development.

Porting the Slint UI Toolkit to a Microcontroller with 264K RAM

March 30, 2022

Our vision with Slint as a cross-platform native UI toolkit is to provide user interfaces for any device. Initially we focused on running on desktop-class machines and embedded devices that support OpenGL ES. A few months ago we started porting Slint to microcontrollers (MCUs), and this blog post describes how we achieved that.