>> FAS file

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.

1 filename extension(s) found in our database.

.fas - Compiled Fast-Load AutoLISP

The FAS application files are related to Autodesk AutoCAD. 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:
Mac OS X Kernel Extension
Mac OS X Application Plug-in
iPhone / iPod Application
Amazon Kindle Active Content App
Adobe Premiere Meta-Plugin
Adobe Premiere Plugin

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
Devil May Cry 3 Data
Forth Source Code
ALEID2000 Basic Data
F# Implementation
Comma-Delimited ASCII File

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 .fas file format, then write to us!