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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:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
IDW - Extension Details
Date Added: January 01, 1970
File Extension:  .IDW
Description 1: .IDW file extension is linked with AutoDesk Inventor Drawing. AutoDesk Inventor is an application that is used for designing digital 3D prototypes and integration of 2D AutoCAD documents into 3D environment. This application offers users to validate their designs and engineering data realtime, reduce engineering costs and minimize physical prototype requirements. .IDW file extension and AutoDesk Inventor are owned and developed by AutoDesk, Inc.
File Type:   3D Graphics, CADCAM file
Mode: Binary
Program(s) to Open:  Window: AutoDesk Inventor, Aldus Intellidraw, Cimmetry Systems AutoVue, Kamel Software FastLook
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