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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:

Getting Started

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

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


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

Check out the Printer Demo running on a Raspberry PI:

Our Offering

We offer three different options for licensing Slint:

Open Source (GPL v3)


For open source applications



Build your own products and help us promote Slint

More Info
Commercial License

Paid-for license

Build your own proprietary products

More Info


Photo of Olivier
Olivier Goffart
Photo of Simon
Simon Hausmann

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.

Contact Us

Questions? Check out our Frequently Asked Questions


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.

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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.

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Weekly Updates