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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DWG (Drawing) is a proprietary binary file format used for storing two- and three-dimensional design data and metadata. It is the nati…
The Wavefront .OBJ file format is a geometry definition file format first developed by Wavefront Technologies for its Advanced Visuali…
JSON (JavaScript Object Notation) is a lightweight, human-readable data-interchange format. It is widely used for transmitting data be…
A CSV (Comma Separated Values) file is a plain text file that stores tabular data (numbers and text) in a simple, structured format. E…
The MDB file extension is primarily associated with Microsoft Access, a database management system (DBMS) from Microsoft. MDB files st…
STEP (Standard for the Exchange of Product Data) files, identified by the extensions .stp or .step, are a widely used ISO standard (IS…
The IGES (Initial Graphics Exchange Specification) file format is a vendor-neutral file format that allows the digital exchange of inf…
The STL (Stereolithography) file format is a widely used file format for representing 3D surface geometry. It is primarily used for ra…
glTF (GL Transmission Format) is a royalty-free, open standard for 3D scene and model transmission, developed by the Khronos Group. Th…
GeoTIFF is a public domain metadata standard which allows georeferencing information to be embedded within a TIFF (Tagged Image File F…
Parasolid files, typically with extensions like .x_t (text) or .x_b (binary), are a common format for representing 3D solid models. Th…
The XLSX file format is the default spreadsheet format used by Microsoft Excel, starting with Excel 2007. It's based on the Open XML s…
The .sqlite file extension typically indicates a database file created using the SQLite database management system. SQLite is a self-c…
QCOW2 (QEMU Copy On Write version 2) is a disk image format used by QEMU, a popular open-source virtualization solution. It's designed…
An IMG file is a disk image, a single file containing the complete structure and contents of a data storage medium, such as a hard dri…
The .sat file extension is associated with ACIS, a geometric modeling kernel developed by Spatial Corporation (now part of Dassault Sy…
The FBX file format, short for Filmbox, is a proprietary file format developed by Autodesk. It's primarily used for exchanging 3D data…
The IFC (Industry Foundation Classes) file format is an open, international standard for Building Information Modeling (BIM) data. It…
A .mdmp file, short for Minidump file, is a crash dump file format used by the Windows operating system and other applications. It con…
YAML (YAML Ain't Markup Language) is a human-readable data serialization standard that is often used for configuration files and in ap…
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…
The .hgt file extension is associated with SRTM (Shuttle Radar Topography Mission) data. These files contain elevation data, represent…
XSL (Extensible Stylesheet Language) is a family of languages used for transforming and formatting XML (Extensible Markup Language) do…
VSDX is the file extension for drawings created with Microsoft Visio, a diagramming and vector graphics application. It's the primary…
DWG (Drawing) is a proprietary binary file format used for storing two- and three-dimensional design data and metadata. It is the native format for AutoCAD, a…
The Wavefront .OBJ file format is a geometry definition file format first developed by Wavefront Technologies for its Advanced Visualizer animation package. It…
JSON (JavaScript Object Notation) is a lightweight, human-readable data-interchange format. It is widely used for transmitting data between a server and web ap…
A CSV (Comma Separated Values) file is a plain text file that stores tabular data (numbers and text) in a simple, structured format. Each line of the file repr…
The MDB file extension is primarily associated with Microsoft Access, a database management system (DBMS) from Microsoft. MDB files store the entire database s…
STEP (Standard for the Exchange of Product Data) files, identified by the extensions .stp or .step, are a widely used ISO standard (ISO 10303) for representing…
The IGES (Initial Graphics Exchange Specification) file format is a vendor-neutral file format that allows the digital exchange of information among Computer-A…
The STL (Stereolithography) file format is a widely used file format for representing 3D surface geometry. It is primarily used for rapid prototyping, 3D print…
glTF (GL Transmission Format) is a royalty-free, open standard for 3D scene and model transmission, developed by the Khronos Group. The 'glb' file extension re…
GeoTIFF is a public domain metadata standard which allows georeferencing information to be embedded within a TIFF (Tagged Image File Format) file. This means t…
Parasolid files, typically with extensions like .x_t (text) or .x_b (binary), are a common format for representing 3D solid models. They are the native file fo…
The XLSX file format is the default spreadsheet format used by Microsoft Excel, starting with Excel 2007. It's based on the Open XML standard, which uses a com…
The .sqlite file extension typically indicates a database file created using the SQLite database management system. SQLite is a self-contained, serverless, zer…
QCOW2 (QEMU Copy On Write version 2) is a disk image format used by QEMU, a popular open-source virtualization solution. It's designed to be a flexible and eff…
An IMG file is a disk image, a single file containing the complete structure and contents of a data storage medium, such as a hard drive, floppy disk, CD-ROM…
The .sat file extension is associated with ACIS, a geometric modeling kernel developed by Spatial Corporation (now part of Dassault Systèmes). SAT files store…
The FBX file format, short for Filmbox, is a proprietary file format developed by Autodesk. It's primarily used for exchanging 3D data between different 3D app…
The IFC (Industry Foundation Classes) file format is an open, international standard for Building Information Modeling (BIM) data. It is developed by buildingS…
A .mdmp file, short for Minidump file, is a crash dump file format used by the Windows operating system and other applications. It contains a snapshot of the p…
YAML (YAML Ain't Markup Language) is a human-readable data serialization standard that is often used for configuration files and in applications where data is…
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…
The .hgt file extension is associated with SRTM (Shuttle Radar Topography Mission) data. These files contain elevation data, representing terrain height above…
XSL (Extensible Stylesheet Language) is a family of languages used for transforming and formatting XML (Extensible Markup Language) documents. It\'s primarily…
VSDX is the file extension for drawings created with Microsoft Visio, a diagramming and vector graphics application. It's the primary file format used by Visio…
Everything you need to know about file extensions