>> FAI file

FAI file format description

Many people share .fai files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .fai file can be edited, converted or printed with. On this page, we try to provide assistance for handling .fai files.

1 filename extension(s) found in our database.

.fai - FASTA Index Data

The FAI data files are related to Samtools. 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.

Data files
- / -
FASTA Index Data related extensions:
X-Ray Toolkit Metadata
xScope Guides Data
xScope Frames File
ZennoPoster MP Template Data
PhoA Album
XMetaL Author Rules Data

Naturally, other applications may also use the .fai file extension. Even harmful programs can create .fai files. Be especially cautious with .fai files coming from an unknown source!

Can't open a .fai file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


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 one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .fai file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

afi, ai, bai, cai, dai, fa, fak, fal, fau, fi, fia, fxi, gai, rai, tai

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

AOMEI Backupper Backup Archive
SPEFO Stellar Spectra Analysis Data
Bank Administration Institute Data File
WinFax Document
Adobe Glyphlet Development Kit Glyphlet
Falcon Script

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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If you have useful information about the .fai file format, then write to us!

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