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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
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API - Extension Details
Date Added: April 02, 2009
File Extension:  .API
Description 1: .API file extension is linked with Lotus Printer Driver. This is the file extension for the printer drive utilized by Lotus 123 an application from IBM Corporation and it offers the following features: speechenabled SmartMaster templates, enhanced compatibility with MS Excel, @Functions, copydrag and copypaste features, SmartLabels, auto SmartFill, more worksheet rows, detailed answers to queries, excel menu finder, data validation addin, supports Euro currency, autosave and keyboard switching, as well as internet integration capabilities.
Description 2: .API file extension is linked with Adobe Acrobat Plugin. This file provides additional support or features for other formats in order to be read using Adobe Acrobat an application that offers users, both personal and professional, the ability to create, control and combine Adobe PDF documents for efficient, easy and secure distribution, collaboration, and data collection. .API file extension and Acrobat are owned and developed by Adobe Systems Inc.
Description 3: .API file extension is linked with Apple WebObjects Interface. WebObjects is an enterprise framework designed for the development of scalable web applications that utilize objectoriented design standards. It has tools, capabilities and technologies that help create intranet and internet applications. It also addresses a few common problems such as: state management, dynamic web page generation, user input and forms and database interface.
File Type:   Internetrelated File
Mode: Binary
Program(s) to Open:  Mac: Apple WebObjects
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