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.
Refine your search with categories and letters
The mlyacc file format is a specialized input file used by the ML-Yacc parser generator, which is a tool primarily associated with the…
A file with the .sln.dotsettings extension is an XML-based configuration file used by JetBrains ReSharper and JetBrains Rider, which a…
Quarto Markdown (.qmd) is an open-source scientific and technical publishing system built on Pandoc. It serves as the next-generation…
A .dockerignore file is a configuration file used by the Docker command-line interface (CLI) to define which files and directories sho…
An Rmd file is an R Markdown document, which is a plain text file that combines Markdown formatting with embedded R code chunks. This…
An SWC file is a package of pre-compiled Flash symbols and ActionScript code that allows developers to distribute libraries of compone…
An F# Project file, identified by the .fsproj extension, is an XML-based project file used by Microsoft's build system, MSBuild, to ma…
A FASL (Fast Load) file is a compiled binary object file used by various implementations of the Common Lisp programming language. When…
An EBS file is a compiled script file created by E-Prime, a comprehensive software suite used by researchers for designing and running…
A .gitignore file is a plain text configuration file used by the Git version control system. Its primary purpose is to tell Git which…
A .swp file is a temporary swap file created by the Vim (Vi IMproved) text editor or its variants when a user begins editing a file. I…
Extended Backus-Naur Form (EBNF) is a formal meta-syntax notation used to express context-free grammars. It is an extension of the ori…
The vcproject file extension is a legacy project file format used by older versions of Microsoft Visual C++, specifically versions 7.0…
A vbproj.user file is a specialized XML-based configuration file used by Microsoft Visual Studio specifically for Visual Basic .NET pr…
A GSH file is a template file used by Genshi, which is a powerful Python-based library designed for parsing, regenerating, and generat…
A .lua file is a source code file written in Lua, a lightweight, high-level, multi-paradigm programming language designed primarily fo…
An SBT file is a configuration script used by the Scala Build Tool (sbt), which is the primary build system for the Scala programming…
A file with the .sru extension is a PowerBuilder User Object file created by SAP PowerBuilder, which was originally developed by Sybas…
The DSP file extension is primarily associated with Microsoft Visual Studio, where it serves as a project file for older versions of t…
An F# Signature File, denoted by the .fsi extension, is a specialized source file used in the F# programming language, which is a func…
A vcxproj.user file is an XML-based configuration file used by Microsoft Visual Studio to store user-specific settings for a C++ proje…
An RNW file is a source document used for literate programming, specifically within the R statistical computing environment. It combin…
Bazel is an open-source build and test tool developed by Google, designed to handle large-scale software projects with high speed and…
A TJC file is a project file created by USART HMI, a software development tool used to design user interfaces for TJC (Taojingchi) Hum…
The mlyacc file format is a specialized input file used by the ML-Yacc parser generator, which is a tool primarily associated with the Standard ML (SML) progra…
A file with the .sln.dotsettings extension is an XML-based configuration file used by JetBrains ReSharper and JetBrains Rider, which are popular developer prod…
Quarto Markdown (.qmd) is an open-source scientific and technical publishing system built on Pandoc. It serves as the next-generation version of R Markdown, de…
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…
An Rmd file is an R Markdown document, which is a plain text file that combines Markdown formatting with embedded R code chunks. This format is primarily used…
An SWC file is a package of pre-compiled Flash symbols and ActionScript code that allows developers to distribute libraries of components. It is essentially a…
An F# Project file, identified by the .fsproj extension, is an XML-based project file used by Microsoft's build system, MSBuild, to manage and compile F# sourc…
A FASL (Fast Load) file is a compiled binary object file used by various implementations of the Common Lisp programming language. When a Lisp source file, typi…
An EBS file is a compiled script file created by E-Prime, a comprehensive software suite used by researchers for designing and running psychological and behavi…
A .gitignore file is a plain text configuration file used by the Git version control system. Its primary purpose is to tell Git which files, directories, or pa…
A .swp file is a temporary swap file created by the Vim (Vi IMproved) text editor or its variants when a user begins editing a file. Its primary purpose is to…
Extended Backus-Naur Form (EBNF) is a formal meta-syntax notation used to express context-free grammars. It is an extension of the original Backus-Naur Form (B…
The vcproject file extension is a legacy project file format used by older versions of Microsoft Visual C++, specifically versions 7.0 (Visual Studio .NET 2002…
A vbproj.user file is a specialized XML-based configuration file used by Microsoft Visual Studio specifically for Visual Basic .NET projects. It serves as a co…
A GSH file is a template file used by Genshi, which is a powerful Python-based library designed for parsing, regenerating, and generating HTML, XML, and other…
A .lua file is a source code file written in Lua, a lightweight, high-level, multi-paradigm programming language designed primarily for embedded use in applica…
An SBT file is a configuration script used by the Scala Build Tool (sbt), which is the primary build system for the Scala programming language and is also freq…
A file with the .sru extension is a PowerBuilder User Object file created by SAP PowerBuilder, which was originally developed by Sybase. This file format is us…
The DSP file extension is primarily associated with Microsoft Visual Studio, where it serves as a project file for older versions of the integrated development…
An F# Signature File, denoted by the .fsi extension, is a specialized source file used in the F# programming language, which is a functional-first language wit…
A vcxproj.user file is an XML-based configuration file used by Microsoft Visual Studio to store user-specific settings for a C++ project, which is primarily de…
An RNW file is a source document used for literate programming, specifically within the R statistical computing environment. It combines LaTeX documentation wi…
Bazel is an open-source build and test tool developed by Google, designed to handle large-scale software projects with high speed and reliability. The .bazel e…
A TJC file is a project file created by USART HMI, a software development tool used to design user interfaces for TJC (Taojingchi) Human-Machine Interface (HMI…
Everything you need to know about file extensions