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 Jinja2 file is a template file used by the Jinja2 templating engine, a popular and powerful templating language for Python. These fi…
A '.py' file is a source code file written in the Python programming language. Python is a high-level, general-purpose programming lan…
A .thrift file is a definition file used by the Apache Thrift framework. Apache Thrift is an interface definition language (IDL) and b…
A .pyw file is a Python source code file designed primarily for graphical user interface (GUI) applications on Windows. The key differ…
A `.lib` file is a static library file format, primarily used on Windows systems. It contains pre-compiled code, routines, functions…
EJS (Embedded JavaScript) is a simple templating language that lets you generate HTML markup with plain JavaScript. It's commonly used…
ERB (Embedded Ruby) is a templating system for Ruby. It allows you to embed Ruby code within text documents, typically HTML, XML, or Y…
SCSS (Sassy CSS) is a preprocessor scripting language that is compiled or interpreted into Cascading Style Sheets (CSS). SCSS is an ex…
Haml (HTML Abstraction Markup Language) is a templating engine designed to simplify and streamline the creation of HTML documents. It…
Twig is a flexible, fast, and secure template engine for PHP. It's used to separate the presentation logic from the application logic…
The `.slim` file extension is primarily associated with the Slim Framework, a popular PHP micro-framework used for developing web appl…
The `.blade.php` file extension is used for Blade templates, which are a templating engine included with the Laravel PHP framework. Bl…
The `.vue` file extension is primarily associated with Vue.js, a progressive JavaScript framework used for building user interfaces an…
JSX is a syntax extension to JavaScript that allows you to write HTML-like structures within your JavaScript code. It's primarily used…
Mako is a template library written in Python. Mako templates are used to generate text output, typically HTML, XML, or other markup la…
Nunjucks is a powerful templating engine for JavaScript, heavily inspired by Jinja2 (Python). Files with the `.njk` extension are Nunj…
Jade (now known as Pug) is a high-performance template engine heavily influenced by Haml and implemented with JavaScript for Node.js a…
Velocity Template Language (VTL) files, identified by the '.vm' extension, are used to create dynamic web pages, emails, and other con…
The `.svelte` file extension is used for Svelte component files. Svelte is a modern JavaScript compiler that transforms component code…
Liquid is a template engine created by Shopify and written in Ruby. It is used to build dynamic web pages and emails by separating the…
A .netmodule file is a .NET Framework assembly that does not contain an assembly manifest. It's essentially a compiled code module, si…
FreeMarker is a template engine: a Java library to generate text output (anything from HTML to auto generated source code) based on te…
A VBX file is a custom control used in earlier versions of Visual Basic (VB) and other Windows development environments. These files c…
A Visual Studio Solution (.sln) file is a structure for organizing projects in Microsoft Visual Studio. It serves as a text-based conf…
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…
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…
A .thrift file is a definition file used by the Apache Thrift framework. Apache Thrift is an interface definition language (IDL) and binary communication proto…
A .pyw file is a Python source code file designed primarily for graphical user interface (GUI) applications on Windows. The key difference between .py and .pyw…
A `.lib` file is a static library file format, primarily used on Windows systems. It contains pre-compiled code, routines, functions, and data that can be link…
EJS (Embedded JavaScript) is a simple templating language that lets you generate HTML markup with plain JavaScript. It's commonly used in Node.js environments…
ERB (Embedded Ruby) is a templating system for Ruby. It allows you to embed Ruby code within text documents, typically HTML, XML, or YAML files. When the ERB f…
SCSS (Sassy CSS) is a preprocessor scripting language that is compiled or interpreted into Cascading Style Sheets (CSS). SCSS is an extension of CSS, adding fe…
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…
Twig is a flexible, fast, and secure template engine for PHP. It's used to separate the presentation logic from the application logic in web development. Twig…
The `.slim` file extension is primarily associated with the Slim Framework, a popular PHP micro-framework used for developing web applications and APIs. These…
The `.blade.php` file extension is used for Blade templates, which are a templating engine included with the Laravel PHP framework. Blade provides a simple yet…
The `.vue` file extension is primarily associated with Vue.js, a progressive JavaScript framework used for building user interfaces and single-page application…
JSX is a syntax extension to JavaScript that allows you to write HTML-like structures within your JavaScript code. It's primarily used with React, a popular Ja…
Mako is a template library written in Python. Mako templates are used to generate text output, typically HTML, XML, or other markup languages, dynamically. The…
Nunjucks is a powerful templating engine for JavaScript, heavily inspired by Jinja2 (Python). Files with the `.njk` extension are Nunjucks template files. Thes…
Jade (now known as Pug) is a high-performance template engine heavily influenced by Haml and implemented with JavaScript for Node.js and browsers. It is used t…
Velocity Template Language (VTL) files, identified by the '.vm' extension, are used to create dynamic web pages, emails, and other content. Velocity is a Java…
The `.svelte` file extension is used for Svelte component files. Svelte is a modern JavaScript compiler that transforms component code into highly efficient va…
Liquid is a template engine created by Shopify and written in Ruby. It is used to build dynamic web pages and emails by separating the presentation logic from…
A .netmodule file is a .NET Framework assembly that does not contain an assembly manifest. It's essentially a compiled code module, similar to a DLL (Dynamic L…
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…
A VBX file is a custom control used in earlier versions of Visual Basic (VB) and other Windows development environments. These files contain reusable code comp…
A Visual Studio Solution (.sln) file is a structure for organizing projects in Microsoft Visual Studio. It serves as a text-based configuration file that descr…
Everything you need to know about file extensions