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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An EAR (Enterprise Archive) file is a deployment unit used in Java EE (Enterprise Edition) environments. It's essentially a JAR (Java…
DWG is a proprietary binary file format used for storing two- and three-dimensional design data and metadata. It is the native format…
M3U8 is a plain text playlist file format used by Apple's HTTP Live Streaming (HLS) protocol. It contains an ordered list of media seg…
A .pyz file is a Python Zip Application, which is an archive containing Python code that can be executed directly. It's essentially a…
FictionBook (FB2) is an XML-based e-book format primarily designed for representing books in a structured and standardized way. Its ma…
SequenceFile is a flat file format prevalent in Hadoop environments, designed to store sequences of binary key/value pairs. It's a cor…
A .hdmp file, also known as a Windows Heap Dump file, is a snapshot of the memory heap of a running process at a specific point in tim…
The .numbers file extension is associated with Apple's Numbers application, a spreadsheet program that is part of the iWork suite. Num…
Pug (formerly known as Jade) is a high-performance template engine heavily influenced by Haml and implemented with JavaScript for Node…
A CAB (Cabinet) file is an archive file format used in Microsoft Windows. It is a single file that can contain multiple compressed fil…
Protocol Buffers (protobuf) is a language-neutral, platform-neutral, extensible mechanism for serializing structured data. It's simila…
Thymeleaf is a modern server-side Java template engine for web and standalone environments. It allows developers to create elegant, we…
The RVT file extension is associated with Autodesk Revit, a Building Information Modeling (BIM) software used extensively in the archi…
A shared object file, identified by the `.so` extension, is a dynamically linked library used primarily in Linux and other Unix-like o…
The .s3db file extension represents a database file used by SQLite, a self-contained, serverless, zero-configuration, transactional SQ…
A .tpl file is a template file used by the Smarty templating engine, a popular PHP web template system. These files contain a mix of H…
The .stp file extension, also known as STEP (Standard for the Exchange of Product Data), represents a 3D graphic file format used for…
ASPX (Active Server Pages Extended) is a file extension for web pages generated by Microsoft's ASP.NET web framework. These files cont…
The Feather file format is a lightweight, columnar data format designed for fast data transfer between data analysis environments. It'…
A Jinja2 file is a template file used by the Jinja2 templating engine, a popular and powerful templating language for Python. These fi…
GRIB (GRIdded Binary) is a concise data format commonly used in meteorology to store and exchange gridded data, such as weather foreca…
An NDF file is a secondary data file used by Microsoft SQL Server. SQL Server databases are typically stored across multiple files for…
A .sqlitedb file is a database file created by SQLite, a self-contained, serverless, zero-configuration, transactional SQL database en…
A '.py' file is a source code file written in the Python programming language. Python is a high-level, general-purpose programming lan…
An EAR (Enterprise Archive) file is a deployment unit used in Java EE (Enterprise Edition) environments. It's essentially a JAR (Java Archive) file with a spec…
DWG is a proprietary binary file format used for storing two- and three-dimensional design data and metadata. It is the native format for several CAD (Computer…
M3U8 is a plain text playlist file format used by Apple's HTTP Live Streaming (HLS) protocol. It contains an ordered list of media segments (typically .ts file…
A .pyz file is a Python Zip Application, which is an archive containing Python code that can be executed directly. It's essentially a self-contained Python app…
FictionBook (FB2) is an XML-based e-book format primarily designed for representing books in a structured and standardized way. Its main goal is to preserve th…
SequenceFile is a flat file format prevalent in Hadoop environments, designed to store sequences of binary key/value pairs. It's a core component of the Hadoop…
A .hdmp file, also known as a Windows Heap Dump file, is a snapshot of the memory heap of a running process at a specific point in time. It's primarily used fo…
The .numbers file extension is associated with Apple's Numbers application, a spreadsheet program that is part of the iWork suite. Numbers files store tabular…
Pug (formerly known as Jade) is a high-performance template engine heavily influenced by Haml and implemented with JavaScript for Node.js and browsers. It's de…
A CAB (Cabinet) file is an archive file format used in Microsoft Windows. It is a single file that can contain multiple compressed files, often used for softwa…
Protocol Buffers (protobuf) is a language-neutral, platform-neutral, extensible mechanism for serializing structured data. It's similar to XML, but smaller, fa…
Thymeleaf is a modern server-side Java template engine for web and standalone environments. It allows developers to create elegant, well-formed HTML5 templates…
The RVT file extension is associated with Autodesk Revit, a Building Information Modeling (BIM) software used extensively in the architecture, engineering, and…
A shared object file, identified by the `.so` extension, is a dynamically linked library used primarily in Linux and other Unix-like operating systems. Unlike…
The .s3db file extension represents a database file used by SQLite, a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite…
A .tpl file is a template file used by the Smarty templating engine, a popular PHP web template system. These files contain a mix of HTML, CSS, JavaScript, and…
The .stp file extension, also known as STEP (Standard for the Exchange of Product Data), represents a 3D graphic file format used for storing 3D models and ass…
ASPX (Active Server Pages Extended) is a file extension for web pages generated by Microsoft's ASP.NET web framework. These files contain a combination of HTML…
The Feather file format is a lightweight, columnar data format designed for fast data transfer between data analysis environments. It's particularly well-suite…
A Jinja2 file is a template file used by the Jinja2 templating engine, a popular and powerful templating language for Python. These files contain a mixture of…
GRIB (GRIdded Binary) is a concise data format commonly used in meteorology to store and exchange gridded data, such as weather forecasts and climate model out…
An NDF file is a secondary data file used by Microsoft SQL Server. SQL Server databases are typically stored across multiple files for performance and manageme…
A .sqlitedb file is a database file created by SQLite, a self-contained, serverless, zero-configuration, transactional SQL database engine. It is a popular cho…
A '.py' file is a source code file written in the Python programming language. Python is a high-level, general-purpose programming language known for its reada…
Everything you need to know about file extensions