File Format Extensions

 

This is a simple list of file name extensions or suffixes

that indicate the format or usage of a file and a brief description of that format.

 

 B C D E F G H I J   K L M N O   P Q R S T   U V W X Y Z

Numbers & Symbols  

 

 A

ABK

Corel Draw AutoBackup

ACL

Corel Draw 6 keyboard accelerator

ACL

Microsoft Office Auto Correction List

ACM

Audio Compression Manager driver. Used by Windows in the system directory

ACP

Microsoft Office Assistant Preview file

ACT

Documenting Wizard action diagram (used by Microsoft Visual FoxPro 6)

ACT

Microsoft Office Assistant Actor file

ACV

OS/2 drivers that compress and decompress audio data

AD

After Dark screensaver

ADB

Appointment database used by HP 100LX organizer

ADD

OS/2 adapter drivers used in the boot process

ADF

Administration configuration files

ADM

After Dark MultiModule screensaver

ADP

Used by FaxWorks to do setup for fax modem interaction

ADR

After Dark Randomizer screensaver

AEP

Adobe After Effects project file

AF2

ABC Flowchart file

AF3

ABC Flowchart file

AFM

Adobe font metrics

AI

Adobe Illustrator drawing

AIF

Mac OS AIFF sound

AIFC

Similar to AIF

AIFF

Similar to AIF

AIS

ACDSee Image Sequence file

ALB

JASC Image Commander album

ALC

DataAlchemy project files

ALL

Arts & Letters Library

AMS

Velvert Studio music module (MOD) file

ANC

Canon Computer Pattern Maker file that is a selectable list of pattern colors

ANI

Animated mouse cursor

ANN

Annotation to a Windows Help (.HLP) file

ANS

ANSI text

API

Application Program Interface file; used by Adobe Acrobat

APP

Generated application or Active Document (used by Microsoft Visual FoxPro 6)

APR

Lotus Approach 97 file

APS

Microsoft Visual C++ file

ARC

LH ARC (old version) compressed archive

ARI

Aristotle audio file

ARJ

Robert Jung ARJ compressed archive

ART

Xara Studio drawing

ART

Canon Crayola art file

ASA

Microsoft Visual InterDev file

ASC

ASCII text

ASC

Indian Languages Document (iLeap)

ASC

Used by PGP (see http://www.pgpi.org)

ASD

WinWord AutoSave

ASF

Microsoft Advanced Streaming Format file

ASM

Assembler language source file

ASP

Active Server Page (an HTML file containing a Microsoft server-processed script)

ASP

Procomm Plus setup and connection script

AST

Claris Works "assistant" file

ASX

Cheyenne Backup script

ASX

Microsoft Advanced Streaming Redirector file

ATT

AT&T Group 4 bitmap

AU

UNIX sound file

AUX

Sort of a write-out file for the LaTeX program

AVI

Microsoft Video for Windows video clip

AWD

FaxView document

AWS

Fax signature viewer

 

B                                                                                                                Back to Top

B4

Helix Nuts and Bolts file

BAK

Backup file

BAS

BASIC code

BAT

MS-DOS batch file

BFC

Windows 95 Briefcase document

BG

Backgammon for Windows game

BI

Binary data file

BIF

GroupWise initialization file

BIN

Binary data file

BK

Sometimes used to denote backup versions

BK$

Sometimes used to denote backup versions

BKS

An IBM BookManager Read bookshelf

BMK

An A bookmark file

BMP

Picture (Windows or OS/2 bitmap)

BM1

Apogee BioMenace data file

BRX

A file for browsing an index of multimedia options (pictures, sound, text, videos) on a CD-ROM

BS1

Apogee Blake Stone data file

BSP

Quake map

BS_

Microsoft Bookshelf Find Menu shell extension

BTM

Batch file used by Norton Utilities

BUN

CakeWalk Audio Bundle file (a MIDI program)

 

 

 

C                                                                                                              Back to Top

C

C code

CAB

Microsoft cabinet file (program files compressed for software distribution)

CAL

CALS Compressed Bitmap

CAL

Calendar schedule data

CAS

Comma-delimited ASCII file

CAT

IntelliCharge categorization file used by Quicken

CB

Microsoft clean boot file

CCB

Visual Basic Animated Button configuration

CCF

Multimedia Viewer configuration file used in OS/2

CCH

Corel Chart

CCM

Lotus CC:Mail "box" (for example, INBOX.CCM)

CCO

CyberChat data file

CCT

Macromedia Director Shockwave cast

CDA

CD Audio Track

CDF

Microsoft Channel Definition Format file

CDI

Philips Compact Disk Interactive format

CDR

Corel Draw drawing

CDT

Corel Draw template

CDX

Compound index (used by Microsoft Visual FoxPro 6)

CDX

Corel Draw compressed drawing

CEF

Compact Embedded Font

CEL

CIMFast Event Language file

CER

Certificate file (MIME x-x509-ca-cert)

CFB

Comptons Multimedia file

CFG

Configuration file

CGI

Common Gateway Interface script file

CGM

Computer Graphics Metafile

CH

OS/2 configuration file

CHK

File fragments saved by Windows Disk Defragmenter or ScanDisk

CHM

Compiled HTML file

CHP

Ventura Publisher chapter

CHT

ChartViewer file

CHT

Harvard Graphics vector file

CIL

Clip Gallery download package

CIM

Sim City 200 file

CIN

OS/2 change control file that tracks changes to an INI file

CK1

iD/Apogee Commander Keen 1 data file

CK2

iD/Apogee Commander Keen 2 data file

CK3

iD/Apogee Commander Keen 3 data file

CK4

iD/Apogee Commander Keen 4 data file

CK5

iD/Apogee Commander Keen 5 data file

CK6

iD/Apogee Commander Keen 6 data file

CLASS

Java class

CLP

Windows Clipboard file

CLS

Visual Basic Class Module

CMD

Command file for Windows NT (similar to a DOS .BAT file)

CMD

DOS CP/M command file

CMD

dBase-II program file

CMF

Corel Metafile

CMP

JPEG Bitmap

CMP

Address document

CMV