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Details of the .fas file extension

The table below provides useful information about the .fas file extension. It answers questions such as:

  • What is the .fas file?
  • What program do I need to open a .fas file?
  • How can the .fas file be opened, edited or printed?
  • Where can I find the specifications for .fas?
  • Which MIME-type is associated with the .fas extension?
  • How can I convert .fas files to another format?
  • What are other, similar filename extensions to .fas?

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

.fas file extension details

Compiled Fast-Load AutoLISP

Compiled Fast-Load AutoLISP .fas file icon
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.
Category: Application files
Application: Autodesk AutoCAD
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
FAS aliases:
FAS related links:
FAS related extensions:
Autodesk AutoCAD Drawing

Autodesk AutoCAD Unit Definition

Autodesk AutoCAD DBConnect Template

Autodesk AutoCAD Menu Definition

Autodesk AutoCAD Drawing Lock

AutoCAD Device-Independent Binary Plotter File

Autodesk AutoCAD AutoFlix Movie Command File

Autodesk AutoCAD Linetypes

Autodesk AutoCAD Slide Library

Autodesk AutoCAD Slide Library

Other types of files may also use the .fas file extension.

.fas file extension error

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:

fs, as, bas, cas, eas, tas, fax, afs, fac, fsa, fae, fws, faq, gas, ras

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

FlexiSign Document
Forth Source Code
F# Implementation
Adobe Flash ActionScript
BASIC Source
Visual Basic Module
Comma-Delimited ASCII File
RSLogix 5000 Symbol Data
ADRIFT Text Adventure Save
G3 FAX Image
open .fas file

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 cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .fas file association, check the FAQ.

.fas file extension

Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .fas file extension, write to us!

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