The native UI toolkit

Build the UI once.
Run it on everything.

One memory-safe codebase for embedded, desktop, mobile & web.
And a UI language designed for developers, designers, and AI agents.

Build with AI Open in SlintPad

Rust · C++ · JavaScript · Python

interactive live preview · real WASM

Live WASM preview — best on a larger screen.

▶ Edit it live in SlintPad

One codebase · Five targets

From bare metal to the browser

The same .slint files compile natively for every target.
Recompiled, never rewritten.

Microcontroller

RTOS · bare metal

Software Rendering

MPU / SoC

Linux · Android · QNX

OpenGL Rendering

Desktop

Windows · macOS · Linux

native build

Mobile

iOS · Android

store ready

Web

WASM · any browser

zero install

One Slint coffee-machine UI running on an embedded display, a phone, a tablet and a laptop — One .slint codebase for embedded display, phone, tablet, desktop, and web.

Explore every target →

Why Slint

Built for the next level of UI

Agentic AI

The UI language your AI agent gets right

Describe your interface in plain language. Slint generates one declarative UI that runs natively on embedded, desktop, mobile and web and safety-certifiable by design. Then its MCP server lets your agent run, see and verify what it built.

Memory-safe

Rust core, no garbage collector, no GC stalls.

< 300 KB

Runs bare-metal on a smaller, cheaper MCU.

Four languages

Rust, C++, JavaScript / TypeScript & Python.
Freedom to choose your programming language.

Live preview

Tweak UI, data and animation without recompiling on your machine, or live on the target device to validate the real UI.

UI testing

Drive your interface and assert on it in code. Benefit from a UI test framework that runs in CI.

Use your favourite IDE

A language server that provides completion, live preview, navigation, diagnostics and syntax highlighting. Also available as a VS Code extension:

Open source

GPL-licensed and royalty-free for desktop, mobile & web, with commercial licensing when you need it.

Safety-ready

Deterministic, auditable, built for certification.

#MadeWithSlint

Shipping in real products

From autonomous rail to EV chargers to pro audio
on embedded, desktop and mobile.

Rail · embedded

OTIV

Autonomous rail-vehicle HMI

"Safe, reliable, and intuitive user interfaces are critical for our customers who depend on OTIV products to drive the future of rail automation. Slint has been an exceptional partner in helping us achieve this, providing the high-performance UI solutions we need to stay at the forefront of innovation."

Sam De Smet · Co-Founder

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EV · automotive

SK Signet

15″–32″ EV-charger displays

"We are very happy to have selected Slint for developing the HMI of our next generation chargers. Slint provides us flexibility, high performance and value-for-money along with great support."

Sang-Baek Lee · Manager

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Audio · desktop

WesAudio

DAW plugin interfaces

"Slint stands out with its extensive out-of-the-box platform support, making it a prime choice for cross-platform development. It is an entirely different level of experience working with people who care about their product, their support and willingness to help is more than extraordinary."

Michał Węglicki · CEO

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Audio · desktop

Aava

Real-time convolution plugin

"Slint is a mature, production-ready UI solution and a joy to work with. The development team is friendly and responsive with issues, bugs and even requested features usually getting solved really quickly."

Jussi Viira · Creator

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See all showcases