FAS Converter

Extract text from FAS files


Drop or upload your .FAS file

How to extract text from your FAS file

  1. Click the "Select File" button above, and choose your FAS file.
  2. You’ll see a preview, if available.
  3. Click the "Convert file to..." button to extract text information.

Convert FAS to another file type

To convert your FAS file to another format, you need Autodesk AutoCAD or other Cad software.

Convert a file to FAS

To convert other file formats to the "Compiled Script File" file type, you need software like Autodesk AutoCAD or a similar tool.


About FAS files

A .fas file typically falls into one of two very different categories, creating significant confusion for users. Most commonly (over 50%), it is a Compiled AutoLISP Script generated by Autodesk AutoCAD. These files are binary compilations of LSP (Lisp) source code, designed to load faster and protect proprietary algorithms from being viewed or modified. Because they are compiled binaries, you cannot simply open them in a text editor to read or change the logic. This proprietary lock-in is a major catch for users who have lost the original source code and need to update a script. The only way to 'edit' a FAS file is to locate the original LSP file or attempt difficult decompilation.

Alternatively, a .fas file may be a FASTA Biological Sequence, a text-based format used in bioinformatics to store nucleotide or peptide sequences. Unlike the AutoCAD version, these are plain text. However, software often misidentifies them due to the shared extension. For AutoCAD users, the goal is often decompilation (converting to LSP) or extraction of data to TXT. For scientists, the goal is converting these sequences to PDF for publication, or standard FASTA or GBK formats for compatibility with tools like NCBI BLAST.

Convert.Guru analyzes your FAS file, detects the exact format, and lets you read the text inside.

Users also converted FASTA, VLX, LSP, TXT, LISP, MAS, AB1, MEGA, RTF, ZIP, PRNX, TMP and STL files.


FAQ

If you want to convert FAS file to FASTA, EXE, MSI, APP, DMG, DEB, RPM, PKG, RUN, SH, BAT or CMD, you can use Autodesk AutoCAD or similar software from the "Compiled AutoLISP Script" category. In the File menu, look for Save As… or Export….

To convert JAR, APP, SCR, IPA, COM, AAB, PS1, DMG, VBS, EXE, XAPK or MSI files to FAS, try Autodesk AutoCAD or another comparable tool in the "Compiled AutoLISP Script" category.



The FAS Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our FAS converter.