Fyne is a free and open-source cross-platform widget toolkit for creating graphical user interfaces (GUIs). It allows application software to run on multiple desktop, mobile operating systems, Web browsers (via WebAssembly) and embedded devices (embedded Linux) from a single code base. Fyne is inspired by the principles of Material Design to create applications that look and behave consistently. It uses OpenGL to provide cross-platform GUIs.
Fyne is licensed under the terms of the 3-clause BSD License, supporting the creation of free and proprietary applications. In December 2019 Fyne became the most popular GUI toolkit for Go, by GitHub star count and in early February 2020 it was trending as #1 project in GitHub trending ranks.
Fyne is currently developed by a team of volunteers and is supported by around 100 contributors. The team meet at a conference held each year along with invited speakers and members of the community.
The Fyne toolkit is written primarily in Go.
Several businesses are using the Fyne toolkit for their internal and utility applications, such as Tuffnells and Tailscale
Linux Format published an interview with the founder.
The Fyne project maintains a listing of open source applications built with Fyne.