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 PHTML file is a web page file containing PHP code. It's essentially an HTML file with embedded PHP scripts. The server's PHP engine…
A VBS file is a text file containing code written in Visual Basic Scripting Edition (VBScript). VBScript is a scripting language devel…
ASP.NET files, typically using the `.aspx` extension (the extension value we'll focus on), are web pages generated using Microsoft's A…
A .ps1 file is a text file containing commands written in the PowerShell scripting language. PowerShell is a task automation and confi…
A 'js' file is a plain text file containing JavaScript code. JavaScript is a high-level, interpreted programming language primarily us…
A .tsx file is a TypeScript file that includes JSX syntax. TypeScript is a superset of JavaScript that adds static typing to the langu…
The .hbs file extension is associated with Handlebars templates. Handlebars is a popular templating engine used primarily in web devel…
A CSS (Cascading Style Sheet) file is a text document that contains style rules for controlling the presentation of HTML or XML docume…
A .pyc file is a compiled bytecode file created by the Python interpreter. When a Python script (.py file) is executed, the interprete…
JSP (JavaServer Pages) is a technology that allows developers to create dynamic web pages based on HTML, XML, or other document types…
A .pyd file is a dynamic link library (DLL) written in Python. It's essentially a compiled Python extension module that can be importe…
The `.cjs` file extension is used for JavaScript files that contain code written using the CommonJS module system. CommonJS is a modul…
The Motorola S-Record file format, often shortened to SREC or S19, is a text-based file format used to represent binary data, primaril…
The `.mjs` file extension is used for ECMAScript JavaScript modules. It signifies that the file should be treated as a module by JavaS…
A CSHTML file is a web page that uses Razor syntax with C# code. It's primarily used in ASP.NET MVC and ASP.NET Core web applications…
An FTL file is a template file used by FreeMarker, a template engine written in Java. FreeMarker is commonly used to generate text-bas…
The `.mustache` file extension is used for templates written in the Mustache templating language. Mustache is a logic-less template sy…
PHP files contain code written in the PHP scripting language. PHP is a widely-used open source general-purpose scripting language that…
The .vbhtml file extension is used for web pages written using the Razor syntax with Visual Basic .NET. Razor is a markup syntax that…
XSLT (Extensible Stylesheet Language Transformations) is a language for transforming XML documents into other XML documents, or other…
Pug (formerly known as Jade) is a high-performance template engine heavily influenced by Haml and implemented with JavaScript for Node…
Thymeleaf is a modern server-side Java template engine for web and standalone environments. It allows developers to create elegant, we…
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…
ASPX (Active Server Pages Extended) is a file extension for web pages generated by Microsoft's ASP.NET web framework. These files cont…
A PHTML file is a web page file containing PHP code. It's essentially an HTML file with embedded PHP scripts. The server's PHP engine processes the PHP code wi…
A VBS file is a text file containing code written in Visual Basic Scripting Edition (VBScript). VBScript is a scripting language developed by Microsoft that is…
ASP.NET files, typically using the `.aspx` extension (the extension value we'll focus on), are web pages generated using Microsoft's ASP.NET framework. These f…
A .ps1 file is a text file containing commands written in the PowerShell scripting language. PowerShell is a task automation and configuration management frame…
A 'js' file is a plain text file containing JavaScript code. JavaScript is a high-level, interpreted programming language primarily used to add interactivity a…
A .tsx file is a TypeScript file that includes JSX syntax. TypeScript is a superset of JavaScript that adds static typing to the language. JSX is a syntax exte…
The .hbs file extension is associated with Handlebars templates. Handlebars is a popular templating engine used primarily in web development. It allows develop…
A CSS (Cascading Style Sheet) file is a text document that contains style rules for controlling the presentation of HTML or XML documents. It defines how eleme…
A .pyc file is a compiled bytecode file created by the Python interpreter. When a Python script (.py file) is executed, the interpreter first compiles it into…
JSP (JavaServer Pages) is a technology that allows developers to create dynamic web pages based on HTML, XML, or other document types. JSP pages contain standa…
A .pyd file is a dynamic link library (DLL) written in Python. It's essentially a compiled Python extension module that can be imported and used within Python…
The `.cjs` file extension is used for JavaScript files that contain code written using the CommonJS module system. CommonJS is a module format designed primari…
The Motorola S-Record file format, often shortened to SREC or S19, is a text-based file format used to represent binary data, primarily for programming microco…
The `.mjs` file extension is used for ECMAScript JavaScript modules. It signifies that the file should be treated as a module by JavaScript runtimes, both in b…
A CSHTML file is a web page that uses Razor syntax with C# code. It's primarily used in ASP.NET MVC and ASP.NET Core web applications. CSHTML files combine HTM…
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…
The `.mustache` file extension is used for templates written in the Mustache templating language. Mustache is a logic-less template system, meaning it aims to…
PHP files contain code written in the PHP scripting language. PHP is a widely-used open source general-purpose scripting language that is especially suited for…
The .vbhtml file extension is used for web pages written using the Razor syntax with Visual Basic .NET. Razor is a markup syntax that allows you to embed serve…
XSLT (Extensible Stylesheet Language Transformations) is a language for transforming XML documents into other XML documents, or other formats such as HTML, pla…
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…
Thymeleaf is a modern server-side Java template engine for web and standalone environments. It allows developers to create elegant, well-formed HTML5 templates…
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…
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…
Everything you need to know about file extensions