The following is a list of the most common file extensions or types that are created
while using the product, or that a user can create or customize to extend the product.

• DIM – Exported Dimension Style file (Express Tools – DIMEX/DIMIM commands)
• LAS – Exported Layer State file (LAYERSTATE command)
• LIN – Linetype file (LINETYPE command)
• MLN – Multiline Style file (MLINE command)
• PAT – Hatch Pattern file (HATCH command)

• ACTM – Action Macro file (ACTRECORD command)
• ARX – ObjectARX file
• ATC – Tool Palette Catalog file
• BMP – Bitmap file used with Customization files
• CUI – Customization file (CUI command)
• CUIx – Customization file (CUI command)
• CRX – Console Runtime Extension file; similar to an ARX file except no user interface
• DBX – ObjectDBX file
• DCE – Dialog Error Log file
• DCL – Dialog Control Language file
• DLL – Menu Resource Library or .NET Assembly
• DVB – VBA Project file (VBAIDE command)
• FAS – Fast-load AutoLISP file
• LSP – AutoLISP Source file
• MNL – Menu LISP files
• MNS – Legacy Menu Source file
• MNU– Legacy Menu Template file
• PGP – Program Parameters
• RX – ObjectARX loader file
• SCR – Script file (SCRIPT command)
• SHP – Source Shape file (SHAPE command)
• SLB – Slide Library file
• SLD – Slide file (MSLIDE command)
• VLX – Compiled AutoLISP project file (VLIDE command)
• XPG – Exported palette group file (CUSTOMIZE command)
• XTP – Export tool palette file (CUSTOMIZE command)

• DST – Drawing Set or Sheet Set file (SHEETSET command)
• DWF – Drawing Web file
• DWFx – Drawing Web file
• DWG – Drawing or Block file
• DWS – Drawing Standards file
• DWT – Drawing Template file
• DXB – Drawing Interchange Binary file
• DXF – Drawing Interchange file, ASCII or binary
• SV$ – Autosave drawing file

• ACB – Autodesk Color Book file (COLOR command)
• ADT – AutoCAD Audit Log file (AUDIT command)
• ARG – Profile file (OPTIONS command)
• AWS – Fixed profile file
• BCL – Drawing Batch file (TrueConvert application)
• BLK – Attribute Extraction Template file (ATTEXT command)
• CBL – Content Browser Library file
• CDC – DesignCenter Preview Cache file (ADCENTER command)
• CFG – Configuration file
• CHM – Microsoft Compiled HTML file
• CHX – Batch Standards Checker file
• CTB – Color-dependent Plot Style file (PLOTSTYLE command)
• CUS – Custom Dictionary file
• DBQ – dbConnect Query file (DBCONNECT command)
• DCT – Dictionary file
• DXE – Data Extraction Wizard Template file
• DXX – Drawing Interchange Attribute file
• FMP – TrueType Font map
• HDI – Heidi Device Interface file
• HTM – HyperText Markup file
• HTML – HyperText Markup Language file
• INI – Initialization files (DGNMAPPING command)
• NFL – Custom Filters file (FILTER command)
• RML – Redline Markup file (MARKUP command)
• SHX – Compiled Shape file (COMPILE command)
• SLG – Status Log file
• STB – Name-dependent Plot Style file (PLOTSTYLE command)
• TTF – TrueType Font file
• TXT – Attribute Template file (Express Tools – ATTIN/ATTOUT commands)
• UDL – Universal Data Link file (DBCONNECT command)
• XLG – Xref Log file (EXTERNALREFERNCE command)

• DSD – Publish Set file (PUBLISH command)
• PC3 – Plot Configuration files
• PLT – Plot file
• PMP – Plotter Model Parameters file
• PSS – Plot Stamp Settings file (PLOTSTAMP command)
• PTW – Publish to Web Template file (PUBLISHTOWEB command)

• ADSKLIB – Materials Library file (MATBROWSEROPEN command)
• IES – Illuminating Engineering Society file (WEBLIGHT command)