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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.

441
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.

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441 extensions
.VHD

Virtual Hard Disk

A VHD (Virtual Hard Disk) file is a disk image format that represents a virtual hard drive. It essentially acts as a container for all…

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
.DAE

Digital Asset Exchange

The DAE file extension represents a Digital Asset Exchange file, which is a COLLADA (COLLAborative Design Activity) file format. COLLA…

Data
.VMDK

Virtual Machine Disk

A VMDK (Virtual Machine Disk) file is a disk image format used by VMware virtualization products, such as VMware Workstation, VMware E…

Data
.SHP

Shapefile

A shapefile is a popular geospatial vector data format for geographic information systems (GIS) software. It is developed and regulate…

Data
.EPUB

Electronic Publication (EPUB) ebook

The EPUB (Electronic Publication) format is a widely used, open-standard ebook format optimized for reflowable text. This means the te…

Data
.KML

Keyhole Markup Language File

KML (Keyhole Markup Language) is an XML-based file format used to represent geographic data in applications like Google Earth, Google…

Data
.USDZ

Universal Scene Description Zipped

The USDZ file format is a zipped and uncompressed archive format developed by Pixar and Apple for storing 3D models and scenes. It is…

Data
.ODS

OpenDocument Spreadsheet

The ODS file extension represents a spreadsheet document format used by OpenOffice and LibreOffice, both open-source office suites. It…

Data
.PLY

Polygon File Format

The PLY file format, also known as the Polygon File Format or Stanford Triangle Format, is a computer file format designed to store th…

Data
.SOLIDWORKS (SLDPRT)

SolidWorks Part

A .SLDPRT file is a 3D part file created by SolidWorks, a popular CAD (Computer-Aided Design) software used for designing and engineer…

Data
.ACCDB

Microsoft Access Database

The .accdb file extension is the default file format for databases created with Microsoft Access, a relational database management sys…

Data
.DBF

Database File

A DBF file is a database file format commonly associated with dBase, FoxPro, Clipper, and similar database management systems. It stor…

Data
.3MF

3D Manufacturing Format

The 3MF (3D Manufacturing Format) file format is an open-source file format specifically designed for 3D printing. It aims to provide…

Data
.OTF

OpenType Font

The OTF (OpenType Font) file format is a widely used standard for digital fonts, developed jointly by Microsoft and Adobe. It's an ext…

Data
.MOBI

Mobipocket eBook

The MOBI file format is a proprietary ebook format developed by Mobipocket, based on the Open eBook standard. It was initially designe…

Data
.AZW3

Amazon Kindle Format 8

AZW3, also known as Kindle Format 8 (KF8), is a refined version of the AZW file format used by Amazon Kindle e-readers. It's essential…

Data
.WOFF

Web Open Font Format

The Web Open Font Format (WOFF) is a font format for use in web pages. It was developed to provide lossless compression of fonts, redu…

Data
.SAB

SABnzbd Configuration File

The .sab file extension is associated with SABnzbd, a popular open-source binary newsreader. These files are configuration files that…

Data
.TSV

Tab-Separated Values

A TSV (Tab-Separated Values) file is a simple text-based format for storing tabular data, such as spreadsheet or database information…

Data
.SKP

SketchUp Model

The SKP file extension is used for 3D models created with SketchUp, a popular 3D modeling software developed by Trimble Inc. These fil…

Data
.IGES (.IGS, .IGES)

Initial Graphics Exchange Specification

The IGES (Initial Graphics Exchange Specification) file format is a vendor-neutral file format that allows the digital exchange of inf…

Data
.WOFF2

Web Open Font Format 2.0

WOFF2 (Web Open Font Format 2.0) is a font format for use in web pages. It is a successor to WOFF and offers improved compression, res…

Data
.DGN

MicroStation Design File

The DGN file format is a CAD (Computer-Aided Design) file format primarily associated with Bentley Systems' MicroStation and other CAD…

Data
.VHD

Virtual Hard Disk

A VHD (Virtual Hard Disk) file is a disk image format that represents a virtual hard drive. It essentially acts as a container for all the data that would resi…

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
.DAE

Digital Asset Exchange

The DAE file extension represents a Digital Asset Exchange file, which is a COLLADA (COLLAborative Design Activity) file format. COLLADA is an open standard XM…

Data
.VMDK

Virtual Machine Disk

A VMDK (Virtual Machine Disk) file is a disk image format used by VMware virtualization products, such as VMware Workstation, VMware ESXi, and VMware vSphere…

Data
.SHP

Shapefile

A shapefile is a popular geospatial vector data format for geographic information systems (GIS) software. It is developed and regulated by Esri as a mostly ope…

Data
.EPUB

Electronic Publication (EPUB) ebook

The EPUB (Electronic Publication) format is a widely used, open-standard ebook format optimized for reflowable text. This means the text adapts to the screen s…

Data
.KML

Keyhole Markup Language File

KML (Keyhole Markup Language) is an XML-based file format used to represent geographic data in applications like Google Earth, Google Maps, and other geospatia…

Data
.USDZ

Universal Scene Description Zipped

The USDZ file format is a zipped and uncompressed archive format developed by Pixar and Apple for storing 3D models and scenes. It is designed for efficient sh…

Data
.ODS

OpenDocument Spreadsheet

The ODS file extension represents a spreadsheet document format used by OpenOffice and LibreOffice, both open-source office suites. It's part of the Open Docum…

Data
.PLY

Polygon File Format

The PLY file format, also known as the Polygon File Format or Stanford Triangle Format, is a computer file format designed to store three-dimensional data, mos…

Data
.SOLIDWORKS (SLDPRT)

SolidWorks Part

A .SLDPRT file is a 3D part file created by SolidWorks, a popular CAD (Computer-Aided Design) software used for designing and engineering mechanical parts and…

Data
.ACCDB

Microsoft Access Database

The .accdb file extension is the default file format for databases created with Microsoft Access, a relational database management system (RDBMS) from Microsof…

Data
.DBF

Database File

A DBF file is a database file format commonly associated with dBase, FoxPro, Clipper, and similar database management systems. It stores structured data in a t…

Data
.3MF

3D Manufacturing Format

The 3MF (3D Manufacturing Format) file format is an open-source file format specifically designed for 3D printing. It aims to provide a complete and unambiguou…

Data
.OTF

OpenType Font

The OTF (OpenType Font) file format is a widely used standard for digital fonts, developed jointly by Microsoft and Adobe. It's an extension of the TrueType fo…

Data
.MOBI

Mobipocket eBook

The MOBI file format is a proprietary ebook format developed by Mobipocket, based on the Open eBook standard. It was initially designed for mobile devices with…

Data
.AZW3

Amazon Kindle Format 8

AZW3, also known as Kindle Format 8 (KF8), is a refined version of the AZW file format used by Amazon Kindle e-readers. It's essentially a compiled HTML format…

Data
.WOFF

Web Open Font Format

The Web Open Font Format (WOFF) is a font format for use in web pages. It was developed to provide lossless compression of fonts, reducing file size and improv…

Data
.SAB

SABnzbd Configuration File

The .sab file extension is associated with SABnzbd, a popular open-source binary newsreader. These files are configuration files that store settings and prefer…

Data
.TSV

Tab-Separated Values

A TSV (Tab-Separated Values) file is a simple text-based format for storing tabular data, such as spreadsheet or database information. Each line in the file re…

Data
.SKP

SketchUp Model

The SKP file extension is used for 3D models created with SketchUp, a popular 3D modeling software developed by Trimble Inc. These files contain all the inform…

Data
.IGES (.IGS, .IGES)

Initial Graphics Exchange Specification

The IGES (Initial Graphics Exchange Specification) file format is a vendor-neutral file format that allows the digital exchange of information among Computer-A…

Data
.WOFF2

Web Open Font Format 2.0

WOFF2 (Web Open Font Format 2.0) is a font format for use in web pages. It is a successor to WOFF and offers improved compression, resulting in smaller file si…

Data
.DGN

MicroStation Design File

The DGN file format is a CAD (Computer-Aided Design) file format primarily associated with Bentley Systems' MicroStation and other CAD applications. It is used…

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.