| File Extension |
File Type |
File Description |
| .a |
Developer |
Static Library |
| .aac |
Audio |
Advanced Audio Coding File |
| .abf |
Font |
Adobe Glyph Bitmap Distribution Format |
| .abk |
Backup |
Automatic Backup |
| .acb |
Misc |
AOL Cab Launcher |
| .ace |
Compressed |
WinAce Compressed File |
| .acr |
Image |
American College of Radiology Format |
| .ad |
Misc |
After Dark Screensaver |
| .adc |
Image |
Scanstudio 16 Color Image |
| .ade |
Data |
Access Project Extension |
| .adf |
Disk |
Amiga Disk Image |
| .adi |
Image |
AutoCAD Device-Independent Binary Plotter |
| .adp |
Data |
Access Project |
| .adr |
Web |
Opera Bookmarks File |
| .afm |
Font |
Adobe Font Metric File |
| .aft |
Data |
Ancestry.com Family Tree Database |
| .ahx |
Audio |
WinAHX Tracker Module |
| .ai |
Image |
Adobe Illustrator File |
| .aif |
Audio |
Audio Interchange File Format |
| .aifc |
Audio |
Compressed Audio Interchange File |
| .aiff |
Audio |
Audio Interchange File Format |
| .aim |
Misc |
AOL Instant Messenger Launch File |
| .ain |
Compressed |
AIN Compressed File Archive |
| .aip |
Plugin |
Illustrator Plug-in |
| .al |
Audio |
A-Law Compressed Sound Format |
| .alaw |
Audio |
A-Law Compressed Sound Format |
| .amr |
Audio |
Adaptive Multi-Rate Codec |
| .amu |
Image |
Sony Photo Album |
| .ani |
System |
Animated Cursor |
| .ann |
System |
Help Annotations |
| .ans |
Text |
ANSI Text File or Text Graphic |
| .aol |
Misc |
America Online File |
| .ape |
Audio |
Monkey's Audio Lossless Audio File |
| .api |
Plugin |
Acrobat Plug-in |
| .app |
Executable |
Mac OS X Application |
| .arc |
Compressed |
Compressed File Archive |
| .ari |
Compressed |
Compressed File Archive |
| .arj |
Compressed |
Compressed File Archive |
| .arr |
Image |
Amber Graphic File |
| .art |
Image |
AOL Compressed Image |
| .art |
Image |
Art Document |
| .asc |
Text |
ASCII Text File |
| .ascii |
Text |
ASCII Text File |
| .asf |
Video |
Advanced Systems Format |
| .ask |
Data |
askSam Database |
| .asl |
Misc |
Photoshop Style |
| .asm |
Developer |
Assembly Language Source Code |
| .asmx |
Web |
Active Server Method File |
| .asp |
Web |
Active Server Page |
| .aspx |
Web |
Active Server Page Extended |
| .asx |
Video |
Microsoft ASF Redirector File |
| .atn |
Misc |
Photoshop Actions |
| .atom |
Web |
Atom Syndication Format |
| .atz |
Misc |
Atomic Time Zone File |
| .au |
Audio |
Audio File |
| .avi |
Video |
Audio Video Interleave File |
| .avr |
Audio |
Audio Visual Research File |
| .avs |
Video |
Application Visualization System Format |
| .awk |
Executable |
AWK Script |
| .ax |
Plugin |
DirectShow Filter |
| .axx |
Compressed |
AxCrypt Encrypted File |
