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 file with the .h++ extension is a C++ header file. Header files are used in C++ programming to declare functions, classes, variables…
Haml (HTML Abstraction Markup Language) is a templating engine designed to simplify and streamline the creation of HTML documents. It…
A .hat file is associated with Hattrick, a popular online football (soccer) management simulation game. These files typically contain…
The .hbs file extension is associated with Handlebars templates. Handlebars is a popular templating engine used primarily in web devel…
The HCA (High Compression Audio) file format is a proprietary audio compression format developed by CRI Middleware. It is primarily us…
A .hdd file is a hard disk image file, essentially a complete sector-by-sector copy of a physical hard drive or a partition. It contai…
HDF5 is a versatile, open-source file format designed to store and organize large amounts of numerical data. It's particularly well-su…
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…
HEIC (High Efficiency Image Container) is a modern image file format developed by the Moving Picture Experts Group (MPEG). It's a cont…
The High Efficiency Image File Format (HEIF) is a modern image container format that leverages advanced compression techniques to stor…
A .helmignore file is a specialized configuration file used by Helm, the package manager for Kubernetes, to define which files and dir…
The Intel HEX file format is a widely used ASCII text file format for conveying binary data, primarily for programming microcontroller…
A .hgignore file is a plain text configuration file used by the Mercurial distributed version control system (DVCS). Its primary purpo…
The .hgt file extension is associated with SRTM (Shuttle Radar Topography Mission) data. These files contain elevation data, represent…
A file with the .hh extension is a header file specifically used in C++ programming. These files serve as a blueprint for source code…
An HPP file is a header file specifically associated with the C++ programming language. It serves as a container for declarations of c…
The HPS file extension is primarily associated with the HPL Engine, a proprietary game engine developed by Frictional Games. These fil…
The HRM file extension is a data format primarily associated with Polar Electro heart rate monitors and their legacy training software…
The HOOPS Stream Format (HSF) is a highly compressed, binary file format designed specifically for the efficient storage and transmiss…
HTML (HyperText Markup Language) is the standard markup language for creating web pages. It provides the structure and content of a we…
HTML (HyperText Markup Language) is the standard markup language for creating web pages. HTML5 is the latest major revision of HTML, a…
A file with the .hxx extension is a header file used primarily in C++ programming. It typically contains declarations of classes, func…
A file with the .h++ extension is a C++ header file. Header files are used in C++ programming to declare functions, classes, variables, and constants that are…
Haml (HTML Abstraction Markup Language) is a templating engine designed to simplify and streamline the creation of HTML documents. It is primarily used in web…
A .hat file is associated with Hattrick, a popular online football (soccer) management simulation game. These files typically contain data related to the game…
The .hbs file extension is associated with Handlebars templates. Handlebars is a popular templating engine used primarily in web development. It allows develop…
The HCA (High Compression Audio) file format is a proprietary audio compression format developed by CRI Middleware. It is primarily used in the video game indu…
A .hdd file is a hard disk image file, essentially a complete sector-by-sector copy of a physical hard drive or a partition. It contains all the data, file sys…
HDF5 is a versatile, open-source file format designed to store and organize large amounts of numerical data. It's particularly well-suited for scientific and e…
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…
HEIC (High Efficiency Image Container) is a modern image file format developed by the Moving Picture Experts Group (MPEG). It's a container format that typical…
The High Efficiency Image File Format (HEIF) is a modern image container format that leverages advanced compression techniques to store images with significant…
A .helmignore file is a specialized configuration file used by Helm, the package manager for Kubernetes, to define which files and directories should be exclud…
The Intel HEX file format is a widely used ASCII text file format for conveying binary data, primarily for programming microcontrollers, EPROMs, and other prog…
A .hgignore file is a plain text configuration file used by the Mercurial distributed version control system (DVCS). Its primary purpose is to specify untracke…
The .hgt file extension is associated with SRTM (Shuttle Radar Topography Mission) data. These files contain elevation data, representing terrain height above…
A file with the .hh extension is a header file specifically used in C++ programming. These files serve as a blueprint for source code, containing declarations…
An HPP file is a header file specifically associated with the C++ programming language. It serves as a container for declarations of classes, functions, consta…
The HPS file extension is primarily associated with the HPL Engine, a proprietary game engine developed by Frictional Games. These files contain scripts writte…
The HRM file extension is a data format primarily associated with Polar Electro heart rate monitors and their legacy training software, such as Polar ProTrain…
The HOOPS Stream Format (HSF) is a highly compressed, binary file format designed specifically for the efficient storage and transmission of complex 3D visuali…
HTML (HyperText Markup Language) is the standard markup language for creating web pages. It provides the structure and content of a webpage, defining elements…
HTML (HyperText Markup Language) is the standard markup language for creating web pages. HTML5 is the latest major revision of HTML, and it includes a number o…
A file with the .hxx extension is a header file used primarily in C++ programming. It typically contains declarations of classes, functions, variables, and oth…
Everything you need to know about file extensions