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.
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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A D64 file is a disk image format commonly associated with the Commodore 64 (C64) home computer. It's essentially a digital representa…
The D71 file extension represents a disk image format specifically designed for the Commodore 1571 disk drive, which was primarily use…
The d81 file extension is a disk image format specifically created to represent the data stored on a 3.5-inch floppy disk used by the…
The DAE file extension represents a Digital Asset Exchange file, which is a COLLADA (COLLAborative Design Activity) file format. COLLA…
A DB3 file is a database file created by SQLite, a widely used, self-contained, serverless, and zero-configuration SQL database engine…
A DBF file is a database file format commonly associated with dBase, FoxPro, Clipper, and similar database management systems. It stor…
The .dbt file extension is primarily associated with dbt (data build tool), an open-source command-line tool that enables data analyst…
The DBX file format is a proprietary database format used primarily by Microsoft Outlook Express, a legacy email client that was bundl…
A DDL (Data Definition Language) file contains commands used to define the structure of a database. These commands are part of SQL (St…
A .deb file is a software package format used primarily in Debian-based Linux distributions, such as Ubuntu, Linux Mint, and Debian it…
The .delta file extension is primarily associated with Delta Lake, an open-source storage layer that brings reliability to data lakes…
A .dem file is a Digital Elevation Model (DEM) file, a raster-based geospatial data format used to represent terrain elevation. It sto…
A .devpkg file is a Garmin Device Package used primarily for delivering software updates, firmware, and additional components to Garmi…
The DGN file format is a CAD (Computer-Aided Design) file format primarily associated with Bentley Systems' MicroStation and other CAD…
A DIFF file, also known as a patch file, is a plain text document that describes the differences between two versions of a file, typic…
DjVu (pronounced "déjà vu") is a file format primarily designed for storing scanned documents, especially those containing text, phot…
A DLL (Dynamic Link Library) file is a library that contains code and data that can be used by more than one program at the same time…
The DLS (Downloadable Sounds) file format is a standard developed by the MIDI Manufacturers Association (MMA) to define a file format…
A DMG file is an Apple Disk Image file, a common format used on macOS to distribute software. It's essentially a digital container tha…
A DMP file, short for Memory Dump file, is a snapshot of a computer's memory at a specific point in time. These files are typically cr…
The .dna file extension is primarily associated with SnapGene, a specialized molecular biology software suite used for documenting, si…
The DNG (Digital Negative) file format is a proprietary, publicly available lossless raw image format developed by Adobe. It is intend…
The DOC file extension is primarily associated with Microsoft Word documents. It was the default format for Word documents from its in…
A .dockerignore file is a configuration file used by the Docker command-line interface (CLI) to define which files and directories sho…
A D64 file is a disk image format commonly associated with the Commodore 64 (C64) home computer. It's essentially a digital representation of a 5.25-inch flopp…
The D71 file extension represents a disk image format specifically designed for the Commodore 1571 disk drive, which was primarily used with the Commodore 128…
The d81 file extension is a disk image format specifically created to represent the data stored on a 3.5-inch floppy disk used by the Commodore 1581 disk drive…
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…
A DB3 file is a database file created by SQLite, a widely used, self-contained, serverless, and zero-configuration SQL database engine. It stores structured da…
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…
The .dbt file extension is primarily associated with dbt (data build tool), an open-source command-line tool that enables data analysts and engineers to transf…
The DBX file format is a proprietary database format used primarily by Microsoft Outlook Express, a legacy email client that was bundled with Internet Explorer…
A DDL (Data Definition Language) file contains commands used to define the structure of a database. These commands are part of SQL (Structured Query Language)…
A .deb file is a software package format used primarily in Debian-based Linux distributions, such as Ubuntu, Linux Mint, and Debian itself. It's essentially an…
The .delta file extension is primarily associated with Delta Lake, an open-source storage layer that brings reliability to data lakes. Delta Lake provides ACID…
A .dem file is a Digital Elevation Model (DEM) file, a raster-based geospatial data format used to represent terrain elevation. It stores elevation values for…
A .devpkg file is a Garmin Device Package used primarily for delivering software updates, firmware, and additional components to Garmin GPS devices, wearables…
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…
A DIFF file, also known as a patch file, is a plain text document that describes the differences between two versions of a file, typically source code. These f…
DjVu (pronounced "déjà vu") is a file format primarily designed for storing scanned documents, especially those containing text, photographs, and line art. It…
A DLL (Dynamic Link Library) file is a library that contains code and data that can be used by more than one program at the same time. DLLs are a crucial part…
The DLS (Downloadable Sounds) file format is a standard developed by the MIDI Manufacturers Association (MMA) to define a file format for wavetable synthesis…
A DMG file is an Apple Disk Image file, a common format used on macOS to distribute software. It's essentially a digital container that holds compressed softwa…
A DMP file, short for Memory Dump file, is a snapshot of a computer's memory at a specific point in time. These files are typically created when a program cras…
The .dna file extension is primarily associated with SnapGene, a specialized molecular biology software suite used for documenting, simulating, and visualizing…
The DNG (Digital Negative) file format is a proprietary, publicly available lossless raw image format developed by Adobe. It is intended to be a universal raw…
The DOC file extension is primarily associated with Microsoft Word documents. It was the default format for Word documents from its initial release up to Word…
A .dockerignore file is a configuration file used by the Docker command-line interface (CLI) to define which files and directories should be excluded from the…
Everything you need to know about file extensions