About Slint.
One toolkit for designers and developers to build the UI
Design and code usually live in different tools,
and the handover between them is where time and detail get lost.
Slint aims to enable designers and developers to iteratively collaborate
on user interface design, from creation to deployment.
Scalable
The UI toolkit for every screen, from a low-end embedded board to a desktop computer.
Lightweight
Require minimal resources, in terms of memory and processing power, and yet deliver a smooth fluid user experience.
Intuitive
Tools designers love working with, and idiomatic APIs that are consistent whichever language a developer picks.
Native
An application that behaves the way people expect on the platform it runs on: desktop, mobile, web or embedded.
Our open source philosophy
We believe that open source software development and communities are the foundation for a healthy ecosystem of high-quality software, where everyone can learn, improve and give back.
We pledge to develop Slint in the open under an OSI approved license.
Gallery of contributors. See the full list.
Roadmap discussions happen in GitHub issues and in our Mattermost chat,
and questions are welcome in GitHub Discussions.
The company behind Slint
SixtyFPS GmbH, registered in Germany, is the company behind Slint. We are based in Europe and serve our users and customers globally, with a remote working policy, flexible hours, and time together in person through the year. Between us we have spent more than fifty years building GUI toolkits and developer tools, much of it on Qt.
The team brings together engineers and designers across Europe, backed by a worldwide community of open-source contributors who help shape Slint every day. We are always looking for talented people to join us.
The story so far
Web content, AI tooling, and safety-critical work
Servo brings web content into a native Slint UI, an MCP server lets coding agents work with the toolkit, and Slint SC takes a deterministic subset into safety-critical products.
Read the blog →iOS, a Figma plugin, and Material 3
A Figma plugin put design tokens in the hands of designers, WGPU and an iOS port widened where Slint runs, and Material 3 components arrived under MIT.
Android, Python, and a rebuilt live preview
Slint 1.5 brought Android support and Python bindings, and the year closed with new docs and an element inspector.
Slint 1.0, a royalty-free license, and an award
The first stable release shipped in April, the royalty-free license followed in 1.1, and Slint won the Embedded Award at Embedded World.
Announcing 1.0 →A new name, microcontrollers, and funding
SixtyFPS became Slint in February. In March we joined the Rust Foundation and ran the toolkit on a microcontroller with 264K of RAM; in May we raised a seed round and started hiring.
Why we renamed →First releases, and the tooling around them
Version 0.1 arrived in August, after editor support and the first tutorials for Rust and C++.
Olivier and Simon introduce SixtyFPS
Two engineers who had spent years on GUI toolkits set out to build a new one, in Rust, with a language designers could read.
The first post →Acknowledgements
Slint is funded by its customers, by a seed round raised in 2022, and by public research programmes: grants from NLnet and NGI Zero, and projects co-funded by the European Union and the State of Brandenburg. About the EU-funded project →