View all extensions

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.

20
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.
Browse categories Filter by documents, images, videos, archives, data, and more.
Open files safely Check file sources and use trusted software before opening unknown files.

Filter extensions

Refine your search with categories and letters

20 extensions
Data Letter: B Clear all
.BA2

Bethesda Archive 2 File

The BA2 format (Bethesda Archive 2) is a proprietary archive file format developed by Bethesda Game Studios for use with their Creatio…

Data
.BAK

Backup File

A BAK file is a backup file, a copy of data created as a safeguard in case the original data is lost or damaged. These files are commo…

Data
.BAK.OLD

Backup File

A .bak file is a backup file, a common extension used to denote a copy of data created for recovery purposes in case the original data…

Data
.BAM

Binary Alignment Map

The BAM (Binary Alignment Map) file format is the compressed binary version of the Sequence Alignment Map (SAM) format, designed speci…

Data
.BGDM

Beat Saber Game Data Manager File

The BGDM file format (Beat Saber Game Data Manager) is a specialized data file primarily utilized within the modding community for the…

Data
.BGEM

Binary Geometry Exchange Model

The BGEM (.bgem) file format is a specialized binary format primarily used for storing highly optimized 3D geometry data. It is often…

Data
.BGSM

Bethesda Game Material File

The BGSM (Bethesda Game Material) file format is a proprietary data file used extensively by games built on the Bethesda Creation Engi…

Data
.BIG5

Big5 Traditional Chinese Text File

Big5 is a character encoding standard used for Traditional Chinese characters, predominantly in Taiwan, Hong Kong, and Macau. Develope…

Data
.BIL

Band Interleaved by Line

The .bil file extension represents a Band Interleaved by Line raster image file. This format is commonly used in remote sensing and ge…

Data
.BIN/CUE

BIN/CUE Image

The BIN/CUE file format is a disc image format commonly used for creating exact copies of CDs and DVDs. The BIN file contains the raw…

Data
.BINARY (.BIN)

Binary File

A .bin file is a generic binary file format used for storing data in a non-textual, machine-readable form. Unlike text files, binary f…

Data
.BIP

Binary Image Partition

A .bip file is a Binary Image Partition file, often associated with firmware images for embedded systems and devices. These files typi…

Data
.BKP

Backup File

A .bkp file is a generic file extension used to denote a backup copy of data. The specific content and format of a .bkp file can vary…

Data
.BLEND

Blender Project File

A .blend file is the native file format used by Blender, a free and open-source 3D creation suite. It stores all the data necessary fo…

Data
.BML

Bean Markup Language

The Bean Markup Language (BML) is an XML-based component configuration or scripting language designed specifically for wiring together…

Data
.BMS

Be-Music Source File

The Be-Music Source (BMS) format is a specialized file format primarily used in rhythm-based music games. Developed in the late 1990s…

Data
.BREP

Boundary Representation

A BREP file, short for Boundary Representation file, is a 3D CAD (Computer-Aided Design) file format that stores the geometric and top…

Data
.BSQ

Binary Sequence

A .bsq file typically represents a binary sequence, often used in remote sensing and image processing applications. It's a raw, unform…

Data
.BUFR

Binary Universal Form for the Representation of meteorological data

BUFR (Binary Universal Form for the Representation of meteorological data) is a binary data format designed by the World Meteorologica…

Data
.BVH

Biovision Hierarchy

The BVH (Biovision Hierarchy) file format is a widely used standard for storing motion capture data, originally developed by the now-d…

Data
.BA2

Bethesda Archive 2 File

The BA2 format (Bethesda Archive 2) is a proprietary archive file format developed by Bethesda Game Studios for use with their Creation Engine games, notably s…

Data
.BAK

Backup File

A BAK file is a backup file, a copy of data created as a safeguard in case the original data is lost or damaged. These files are commonly created automatically…

Data
.BAK.OLD

Backup File

A .bak file is a backup file, a common extension used to denote a copy of data created for recovery purposes in case the original data is lost or corrupted. Th…

Data
.BAM

Binary Alignment Map

The BAM (Binary Alignment Map) file format is the compressed binary version of the Sequence Alignment Map (SAM) format, designed specifically for storing large…

Data
.BGDM

Beat Saber Game Data Manager File

The BGDM file format (Beat Saber Game Data Manager) is a specialized data file primarily utilized within the modding community for the virtual reality rhythm g…

Data
.BGEM

Binary Geometry Exchange Model

The BGEM (.bgem) file format is a specialized binary format primarily used for storing highly optimized 3D geometry data. It is often associated with environme…

Data
.BGSM

Bethesda Game Material File

The BGSM (Bethesda Game Material) file format is a proprietary data file used extensively by games built on the Bethesda Creation Engine, notably Fallout 4, Sk…

Data
.BIG5

Big5 Traditional Chinese Text File

Big5 is a character encoding standard used for Traditional Chinese characters, predominantly in Taiwan, Hong Kong, and Macau. Developed in the mid-1980s by a c…

Data
.BIL

Band Interleaved by Line

The .bil file extension represents a Band Interleaved by Line raster image file. This format is commonly used in remote sensing and geographic information syst…

Data
.BIN/CUE

BIN/CUE Image

The BIN/CUE file format is a disc image format commonly used for creating exact copies of CDs and DVDs. The BIN file contains the raw binary data of the disc…

Data
.BINARY (.BIN)

Binary File

A .bin file is a generic binary file format used for storing data in a non-textual, machine-readable form. Unlike text files, binary files contain data represe…

Data
.BIP

Binary Image Partition

A .bip file is a Binary Image Partition file, often associated with firmware images for embedded systems and devices. These files typically contain a specific…

Data
.BKP

Backup File

A .bkp file is a generic file extension used to denote a backup copy of data. The specific content and format of a .bkp file can vary significantly depending o…

Data
.BLEND

Blender Project File

A .blend file is the native file format used by Blender, a free and open-source 3D creation suite. It stores all the data necessary for a Blender project, incl…

Data
.BML

Bean Markup Language

The Bean Markup Language (BML) is an XML-based component configuration or scripting language designed specifically for wiring together Java Beans. Originally d…

Data
.BMS

Be-Music Source File

The Be-Music Source (BMS) format is a specialized file format primarily used in rhythm-based music games. Developed in the late 1990s as a way to simulate the…

Data
.BREP

Boundary Representation

A BREP file, short for Boundary Representation file, is a 3D CAD (Computer-Aided Design) file format that stores the geometric and topological information of a…

Data
.BSQ

Binary Sequence

A .bsq file typically represents a binary sequence, often used in remote sensing and image processing applications. It's a raw, unformatted data file that cont…

Data
.BUFR

Binary Universal Form for the Representation of meteorological data

BUFR (Binary Universal Form for the Representation of meteorological data) is a binary data format designed by the World Meteorological Organization (WMO) for…

Data
.BVH

Biovision Hierarchy

The BVH (Biovision Hierarchy) file format is a widely used standard for storing motion capture data, originally developed by the now-defunct motion capture com…

Data

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.