.A.OUT
Executable and Linkable Format
Executable
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52 extensions
Letter: A
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.A51
Intel 8051 Assembly Language Source Code File
Programming
.AAB
Android App Bundle
Archive
.AAC
Advanced Audio Coding
Audio
.AAF
Advanced Authoring Format
Video
.ABNF
Augmented Backus-Naur Form
Programming
.ACCDB
Microsoft Access Database
Data
.ACIS
ACIS Solid Model
Data
.ACIS (.SAT)
ACIS Solid Model
Data
.ACIS (.SAT, .SAB)
ACIS Solid Model
Data
.ACTIVEX
ActiveX Control
Executable
.ACTIVEX (OCX REPLACEMENT)
ActiveX Control
Executable
.ADG
Ableton Device Group
Data
.AEP
Adobe After Effects Project File
Video
.AI'
Adobe Illustrator Artwork
Image
.AIFF
Audio Interchange File Format
Audio
.AIR
Adobe AIR Installation Package
Executable
.ALAC
Apple Lossless Audio Codec
Audio
.ALS
Ableton Live Set
Audio
.AMC
Acclaim Motion Capture File
Data
.AMF
Additive Manufacturing File Format
Data
.ANE
Adobe Native Extension
Programming
.ANIMATED PNG
Animated Portable Network Graphics
Image
.APE
Monkey's Audio
Audio
.A.OUT
.A51
.AAB
.AAC
.AAF
.ABNF
.ACCDB
.ACIS
.ACIS (.SAT)
.ACIS (.SAT, .SAB)
.ACTIVEX
.ACTIVEX (OCX REPLACEMENT)
.ADG
.AEP
.AI'
.AIFF
.AIR
.ALAC
.ALS
.AMC
.AMF
.ANE
.ANIMATED PNG
.APE
Executable and Linkable Format
Executable
Intel 8051 Assembly Language Source Code File
Programming
Android App Bundle
Archive
Advanced Audio Coding
Audio
Advanced Authoring Format
Video
Augmented Backus-Naur Form
Programming
Microsoft Access Database
Data
ACIS Solid Model
Data
ACIS Solid Model
Data
ACIS Solid Model
Data
ActiveX Control
Executable
ActiveX Control
Executable
Ableton Device Group
Data
Adobe After Effects Project File
Video
Adobe Illustrator Artwork
Image
Audio Interchange File Format
Audio
Adobe AIR Installation Package
Executable
Apple Lossless Audio Codec
Audio
Ableton Live Set
Audio
Acclaim Motion Capture File
Data
Additive Manufacturing File Format
Data
Adobe Native Extension
Programming
Animated Portable Network Graphics
Image
Monkey's Audio
Audio
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Everything you need to know about file extensions
You can search by entering a file extension directly in the search bar or browse the directory by category or alphabetical index.
Each listing provides a definition of the file extension, common use cases, compatible software, supported platforms, and related or alternative formats.
The database is updated regularly to reflect new file extensions, changes in software compatibility, and evolving file format standards.