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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
PBM - Extension Details
Date Added: January 01, 1970
File Extension:  .PBM
Description 1: PBM is a Portable Bitmap Image file. It features a onebit black and white image that uses text formatting. A .PBM file includes basic raster image format. Simply put, each pixel in a .PBM file is represented by a byte containing a 0 or a 1. The 0 represents white pixels while the 1 is for the black pixels. Nero, a topselling multimedia suite, is an application associated with the .PBM file extension.
File Type:   Raster Image file
Mode: Binary
Program(s) to Open:  Windows: ACDSee Photo Manager, Adobe Photoshop with CartaPGM plugin, Netpbm, Newera Graphics Converter Pro, editable with a text editor Macintosh: Adobe Photoshop with CartaPGM plugin, Lemkesoft GraphicConverter, Netpbm, editable with a text editor Unix: Netpbm graphics package
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