Keil makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for the ARM, XC16x/C16x/ST10, 251, and 8051 microcontroller families.

Keil makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for the ARM, XC16x/C16x/ST10, 251, and 8051 microcontroller families.

Keil makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for the ARM, XC16x/C16x/ST10, 251, and 8051 microcontroller families.

Keil MDK simplifies embedded software development for Cortex®‑M and Ethos™‑U processors. It offers flexibility through CLI, IDE, or continuous integration workflows. Learn More Get the Tools

Arm Keil MDK-Community Edition. Keil MDK is free to use for non-commercial projects under the Community Edition license. To activate a Community Edition license for use with μVision or Keil Studio for VS Code follow the instructions below.

Built on open-source development flows created by Arm and our ecosystem, Keil MDK v6 gives you the flexibility to develop your software in an IDE or on the command line, across all major operating systems.

Keil is a German software subsidiary of Arm Holdings. It was founded in 1982 by Günter and Reinhard Keil, initially as a German GbR . In April 1985 the company was converted to Keil Elektronik GmbH to market add-on products for the development tools provided by many of the silicon vendors.