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File Extensions

Browse file extensions by category or letter. Learn what each file type is used for and find software that can open, view, edit, or convert it.

7
Indexed file extensions

Find the right information for any file extension

Use this directory to look up file formats, understand what files are used for, and find compatible applications for Windows, macOS, Linux, mobile, and online tools.

Search by extension Enter extensions like PDF, APK, DAT, HEIC, ZIP, or DOCX.
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7 extensions
Audio Letter: A Clear all
.AAC

Advanced Audio Coding

Advanced Audio Coding (AAC) is a standardized, lossy audio compression and encoding scheme for digital audio. Designed to be the succe…

Audio
.ADX

CRI ADX Audio Format

The ADX file format is a proprietary lossy audio compression format developed by CRI Middleware. It is primarily used in video games…

Audio
.AIFF

Audio Interchange File Format

The Audio Interchange File Format (AIFF) is an audio file format standard used for storing sound data for personal computers and other…

Audio
.ALAC

Apple Lossless Audio Codec

The ALAC (Apple Lossless Audio Codec) file format is a lossless audio compression format developed by Apple Inc. It's designed to redu…

Audio
.ALS

Ableton Live Set

An ALS file is a project file created by Ableton Live, a professional digital audio workstation (DAW) widely used for music production…

Audio
.APE

Monkey's Audio

Monkey's Audio (APE) is a lossless audio compression format. This means that, unlike lossy formats like MP3 or AAC, no audio data is d…

Audio
.AUPRESET

Audio Unit Preset File

An AUPRESET file is a configuration file used by Apple's Audio Units (AU) technology, which is a system-level plug-in architecture for…

Audio

Frequently Asked Questions

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.