Keil develops, manufactures, and distributes embedded software development tools for 8051, 251, ARM, and XC16x/C16x/ST10 microcontroller families.  We provide ANSI C compilers, Macro Assemblers, real-time executives, debuggers and simulators, integrated environments, and evaluation boards. This web site provides the latest information about our development tools, evaluation tools, software updates, application notes, example programs, and links to other sources of information.

Keil was founded in 1986 to market add-on products for the development tools provided by many of the silicon vendors. It soon became evident that there was a void in the marketplace that must be filled by quality software development tools. It was then that Keil implemented the first C compiler designed from the ground-up specifically for the 8051 microcontroller.

Today, Keil provides a broad range of development tools for the embedded systems marketplace. Our products include ANSI C compilers, macro assemblers, debuggers, linkers, library managers, and real-time operating systems. Products such as these have helped Keil become the world's leading developer of Embedded Systems Software.

Since its beginning, Keil has driven the industry to new heights with advanced software technology. Our constant, hard-driving research has paid off time and again as we continue to develop innovative products that make product development easier.

In October 2005, Keil (Keil Elektronik GmbH in Munich, Germany, and Keil Software, Inc. in Plano, Texas) was acquired by ARM. Read more about the Keil acquisition.