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Details of extension .fai

On this page, we're going to take a closer look at the .fai file extension, which is related to FASTA Index Data. We'll explain what exactly a .fai fileformat is and how you can use it. If you're interested in learning more details about this type of file, we'll show you where to find them. And if you ever need to convert .fai files into different formats, we'll give you some tips on how to do that too. Let's see the file format associated with this file extension!

Contents

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fai file - FASTA Index Data

FASTA Index Data

The FAI file is a FASTA Index Data. In bioinformatics, FASTA format is a text-based format for representing either nucleotide sequences or peptide sequences, in which nucleotides or amino acids are represented using single-letter codes.
Category: Data files
Application: Samtools
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Aliases:
-
Related extensions:
.qual Quality Score File
.gbk GenBank Data
.fasta FASTA Sequence
.mauve Mauve Alignment Data
Links:
-

The .fai file extension might not only belong to a single type of file, there could be various kinds that use it. Keep in mind that files with the .fai extension may contain various content types. If you have helpful information about this extension, write to us!

Could someone have spelled the .fai file extension wrong?

In our database, we came across the following similar extensions:

.rai SPEFO Stellar Spectra Analysis Data
.afi Aperio AFI Picture
.gai Serato DJ Data
.fxi File-Ex Configuration Data
.fau Creator Collapsed Fault List
.fak HP MPE/iX Fixed ASCII KSAM Data

The .fai extension is frequently misused

People sometimes confuse the .fai filename extension. Based on the searches on our site, here are the most common misspellings from the past year.

tai (1), afi (1), rai (1), gai (1), fi (1), fal (1), fwi (1), fia (1), cai (1), ai (1)

Having trouble opening a .fai file?

If you want to open a .fai file on your computer, you just need to have the appropriate program installed. Incorrect settings for the .fai association can trigger this error.

Windows can't open this file:

File: example.fai

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2016/2019/2022, Windows 7, Windows 8, Windows 10, Windows 11, Linux, Mac OS X, macOS, iOS, Android

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