.NIB File Extension

There is only one file type that uses the .NIB extension:

Interface Builder User Interface File

Interface Builder User Interface File

File created by Interface Builder, a software development program (included with Apple Xcode) used for building user interfaces for Mac OS X applications; saves a user interface component such as a window or a view as well as the text fields, buttons, and other interactive components.

While NIB files aren't required for Mac OS X applications, they are commonly used since creating interfaces visually in Interface Builder is often easier than creating them programmatically.

NOTE: Version 3 of Interface Builder introduced the .XIB format, which stores the same information as a NIB file but uses a text-based file format.

Software's name License Platforms
Apple Interface Builder Apple Interface Builder Mac
Apple Xcode Apple Xcode Freeware Mac

Updated: June 5, 2011

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