Slint
Build native interfaces with Slint, a declarative GUI toolkit for Rust, C++, JavaScript, and Python.
About Slint
Slint is a declarative GUI toolkit for building native user interfaces with Rust, C++, JavaScript, and Python. From a single codebase, it targets embedded systems, desktop, mobile, and web.
You can describe the interface separately from business logic using a language similar to HTML and CSS. The workflow includes a Figma to Slint plugin for converting selected elements to code, Live-Preview for checking colors, animations, geometry and text changes instantly, and a data editor for testing properties without recompiling. It also provides responsive layouts, pre-built Material 3 components, IDE support through a language server and VS Code extension, and GUI test automation for use in VS Code or a CI pipeline.
It suits developers and teams building cross-platform applications, including touch interfaces and resource-constrained devices. The site shows use in areas such as rail vehicle interfaces, audio workstation plugins, and EV charger displays. The toolkit compiles UI designs to machine code and the runtime fits in less than 300KiB RAM.
Key features
- Build UIs for embedded, desktop, mobile and web
- Write UI in HTML/CSS-like declarative language
- Convert Figma elements to Slint code
- Preview UI changes instantly with Live-Preview
- Use pre-built Material 3 components
- Test UIs in VS Code or CI pipeline
Best for: Developers building native, cross-platform interfaces in Rust, C++, JavaScript, or Python, including for embedded devices.
Good for
- Supports four programming languages from one codebase
- Targets embedded, desktop, mobile and web
- Includes Figma import, live preview and test tools
- Runtime fits in less than 300KiB RAM
Slint at a glance
- Website
- slint.dev
- Category
- Development › Developer Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Developer Tools
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Slint FAQ
What is Slint used for?
Slint is a declarative GUI toolkit for building native interfaces for embedded, desktop, mobile, and web from a single codebase.
Which programming languages does Slint support?
It supports integration of business logic written in Rust, C++, JavaScript, or Python.
Does Slint work with design and development tools?
Yes, it provides a Figma plugin, Live-Preview, a VS Code extension and language server, and GUI test automation for VS Code and CI pipelines.
Can Slint run on small devices?
Yes, the site states the runtime fits in less than 300KiB RAM and supports GPU, DMA2D, framebuffer, and line-by-line rendering.
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