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 FASL (Fast Load) file is a compiled binary object file used by various implementations of the Common Lisp programming language. When…
FreeMarker is a template engine: a Java library to generate text output (anything from HTML to auto generated source code) based on te…
An F# Signature File, denoted by the .fsi extension, is a specialized source file used in the F# programming language, which is a func…
An F# Project file, identified by the .fsproj extension, is an XML-based project file used by Microsoft's build system, MSBuild, to ma…
An FSPROJ.USER file is a user-specific configuration file used by Microsoft Visual Studio and MSBuild for F# (F Sharp) programming pro…
An F# Script file (fsscript) is a source code file used by the F# programming language, which is a functional-first, strongly typed, m…
An FSX file is a source code script written in F# (pronounced F sharp), which is a functional-first, multi-paradigm programming langua…
An FTL file is a template file used by FreeMarker, a template engine written in Java. FreeMarker is commonly used to generate text-bas…
FXML is an XML-based user interface markup language created by Oracle Corporation for defining the user interface of a JavaFX applicat…
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…
FreeMarker is a template engine: a Java library to generate text output (anything from HTML to auto generated source code) based on templates and changing data…
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…
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…
An FSPROJ.USER file is a user-specific configuration file used by Microsoft Visual Studio and MSBuild for F# (F Sharp) programming projects. It is an XML-forma…
An F# Script file (fsscript) is a source code file used by the F# programming language, which is a functional-first, strongly typed, multi-paradigm language th…
An FSX file is a source code script written in F# (pronounced F sharp), which is a functional-first, multi-paradigm programming language that is part of the .N…
An FTL file is a template file used by FreeMarker, a template engine written in Java. FreeMarker is commonly used to generate text-based output, such as HTML w…
FXML is an XML-based user interface markup language created by Oracle Corporation for defining the user interface of a JavaFX application. It provides a sophis…
Everything you need to know about file extensions