What Is an SDK File?

Overview and Purpose

SDK files are created and distributed by a wide variety of companies for developers who want to build their own compatible applications. The file gives you the necessary tools like code and documentation to help you customize applications for software, hardware and operating systems. Some SDK files are free, while others require payment, and some are more open in terms of what they allow you to access. You may use SDK files for different purposes. You may need to create an application for your organization's technical needs, but you may also develop applications for your personal use or to make money. For example, Apple, Android and BlackBerry provide SDK files to developers to create smartphone apps to sell to customers.

Installation

A SDK file is made available over the Web through the company that originally created it. Before downloading and installing the file, check the list of requirements. SDK files vary and may run on Windows, Macintosh, Linux-based machines or all three. You'll also need an integrated development environment, or IDE, on your computer. An IDE is an additional software application to help you program your application. An IDE can be based on a single programming language like Java or it may support multiple languages.

Components

When you download and install an SDK file, you receive different tools to help you with your application build. You may find sample applications to get you started as well as code, drivers, libraries, graphics and graphics converters, documentation and more. Within the documentation you may find tutorials, frequently asked questions and other resources. Some SDK files like those from Android and Apple offer emulators or simulators so you can test your application in a virtual environment.

Examples

SDK files are available for technologies ranging from Microsoft's Kinect to Barnes & Noble's Nook to Cisco's telephones. Google makes SDK files for multiple programming languages to help you build and run custom Web applications. Nikon has SDK files for its cameras and other imaging products, while Intuit provides files for its QuickBooks software. SDK files are also produced by other companies without ties to a particular product that can help you develop applications using specific programming languages.