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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CR2 files are raw image files created by Canon digital cameras. They contain minimally processed data directly from the camera's senso…
The CR3 file format is a proprietary raw image format developed by Canon. It's the successor to the CR2 format and is used by newer Ca…
The CRAM file format is a highly efficient, compressed data format used primarily in the field of bioinformatics and genomics for stor…
A .crash file is a crash report generated by macOS and iOS operating systems when an application unexpectedly terminates or encounters…
A .crdownload file is a temporary file extension used by the Google Chrome web browser (and Chromium-based browsers like Microsoft Edg…
A .crt file is a security certificate file used primarily by web browsers and web servers to verify the identity of a website and esta…
A CRX file is a package file format used by Chromium-based browsers like Google Chrome, Microsoft Edge, and others to distribute exten…
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…
A .csproj file is a project file used by the Microsoft .NET framework to store information about a C# software project. It is an XML-f…
The .csproj.user file is a specialized configuration file used by Microsoft Visual Studio to store user-specific settings for a C# pro…
A CSS (Cascading Style Sheet) file is a text document that contains style rules for controlling the presentation of HTML or XML docume…
A CSV (Comma Separated Values) file is a plain text file that stores tabular data (numbers and text) in a simple, structured format. E…
The CSX file extension represents a C# Script file, which is a specialized version of the standard C# source code file. Unlike traditi…
The CUP file extension is primarily associated with SeeYou, a comprehensive flight planning and analysis software suite developed by N…
A .cvsignore file is a configuration file used by the Concurrent Versions System (CVS), an older revision control system. It is used t…
A .cxx file is a source code file written in the C++ programming language. It is one of several common extensions used for C++ source…
CR2 files are raw image files created by Canon digital cameras. They contain minimally processed data directly from the camera's sensor, preserving a high leve…
The CR3 file format is a proprietary raw image format developed by Canon. It's the successor to the CR2 format and is used by newer Canon digital cameras to st…
The CRAM file format is a highly efficient, compressed data format used primarily in the field of bioinformatics and genomics for storing biological sequences…
A .crash file is a crash report generated by macOS and iOS operating systems when an application unexpectedly terminates or encounters a fatal error. These fil…
A .crdownload file is a temporary file extension used by the Google Chrome web browser (and Chromium-based browsers like Microsoft Edge, Brave, and Opera) to i…
A .crt file is a security certificate file used primarily by web browsers and web servers to verify the identity of a website and establish a secure, encrypted…
A CRX file is a package file format used by Chromium-based browsers like Google Chrome, Microsoft Edge, and others to distribute extensions, themes, and apps…
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…
A .csproj file is a project file used by the Microsoft .NET framework to store information about a C# software project. It is an XML-formatted text file that a…
The .csproj.user file is a specialized configuration file used by Microsoft Visual Studio to store user-specific settings for a C# project. While the primary…
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 CSV (Comma Separated Values) file is a plain text file that stores tabular data (numbers and text) in a simple, structured format. Each line of the file repr…
The CSX file extension represents a C# Script file, which is a specialized version of the standard C# source code file. Unlike traditional .cs files that must…
The CUP file extension is primarily associated with SeeYou, a comprehensive flight planning and analysis software suite developed by Naviter, which is widely u…
A .cvsignore file is a configuration file used by the Concurrent Versions System (CVS), an older revision control system. It is used to specify files and direc…
A .cxx file is a source code file written in the C++ programming language. It is one of several common extensions used for C++ source files, alongside .cpp and…
Everything you need to know about file extensions