Build a better
connected world.

Qt is the faster, smarter way to create innovative devices, UIs and applications for multiple screens.

Discover Qt

A modern user interface that is beautiful on every screen and performs perfectly on every platform is not an option, it’s a necessity.

8 of Top 10 Fortune 500 companies use Qt.

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From your favorite apps on all of your devices to ground-breaking cars and the deep depths of space, Qt is powering millions of devices and applications all over the world. Whether you want to build devices that stand out from the crowd with innovative software, or you just want the freedom to code once and watch as your applications run natively across all platforms, we’re putting the power back in your hands.

Learn more about Qt

1 Framework

Write your source code once and run it anywhere on any device

1 Million

Active Qt users worldwide

1 Ranked #1

Qt is ranked #1 of all cross-platform tools (source: R2G 2014)

1 Unified ecosystem

One ecosystem, stronger together, one Qt

Upcoming events

October 4 – 6, Bangalore, India ESC India

October 18 – 20, San Francisco, CA Qt World Summit

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Qt for Application Development

Build powerful, connected and beautiful applications that run on any screen and across any platform.

Develop applications with Qt ›

Qt for Device Creation

Breathe new life into your devices by using innovative software to stand out from the crowd.

Create devices with Qt ›

Qt in use

Find out why leading companies in more than 70 industries are already using Qt to power millions of devices all over the world.

Read about Qt in the real world ›

Get started with Qt

Qt is a completely flexible and customisable platform. Find out which option is right for you and get started straight away.

Download Qt today ›

Determine which Qt download is best for you Get started