PCauthorities.com presents…
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
FASTA - Extension Details
Date Added: November 03, 2009
File Extension:  .FASTA
Description 1: .FASTA file extension is linked with FASTA Sequence File. This is the scientific data format that is used to store protein sequences or nucleic acid sequences [such as DNA sequences]. It may contain several sequences and may sometimes be referred to as FASTA database format. It can be viewed and analyzed via DNA analysis software. .FASTA files usually start with a header line which may carry comments or other info, and the rest of the file contains the sequence data.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows: CubicDesign DNA Baser, GeneStudio SeqVerter, Geospiza FinchTV; Mac: 4Peaks, Geospiza FinchTV; Unix: EMBOSS abiview
Common:
Extension: