FAS file format description

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

3 filename extension(s) found in our database.

.fas - Compiled Fast-Load AutoLISP

The FAS application files are related to Autodesk AutoCAD. The FAS file is a Compiled Fast-Load AutoLISP. AutoLISP is a dialect of Lisp programming language built specifically for use with the full version of AutoCAD and its derivatives, which include AutoCAD Map 3D, AutoCAD Architecture and AutoCAD Mechanical. Neither the application programming interface nor the interpreter to execute AutoLISP code are included in the AutoCAD LT product line.

Autodesk AutoCAD
Application files
- / -
Compiled Fast-Load AutoLISP related extensions:
Nintendo Switch Executable
LunarCell Photoshop Plug-in
TWAIN Data Source
Windows Script Component File
EDIUS Plugin
VTech InnoTab Application

.fas - QuickSilver Fast Save Lisp Data

The FAS data files are related to BroadVision QuickSilver. The FAS file is a QuickSilver Fast Save Lisp Data. BroadVision QuickSilver is a document sharing product that promotes dynamic content publishing.

BroadVision QuickSilver
Data files
- / -
QuickSilver Fast Save Lisp Data related extensions:
OmniPage Image Enhancement Template
Globus Toolkit Job Description Document
Media Holder Universal Media Format
Autodesk Simulation Mechanical DDAM Frequency Data
PSpice Capture Symbols Model
STK Globe Data

.fasta - FASTA Sequence

The FASTA data files are related to SnapGene. The FASTA file is a FASTA Sequence. 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
- / -
fa, fas, fna, mpfa
FASTA Sequence related extensions:
DNA Electropherogram File
SnapGene DNA Data
ENA EMBL Sequence
FASTA Sequence
GenBank Data
SnapGene Project

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

Can't open a .fas 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 .fas file extension is often given incorrectly!

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

afs, as, bas, cas, das, eas, fa, fac, fae, faq, fax, faz, fs, fsa, fws

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

MODFLOW Basic Package
DeltaMaster Analysis Session Data
Forth Source Code
ADX Audio Container
ALEID2000 Basic Data
ABI Fragment Analysis Data

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.


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

DataTypes.net >> FAS file