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
A .CMD file is a command script file used primarily by the Windows NT family of operating systems (Windows NT, 2000, XP, Vista, 7, 8…
The Common Object File Format (COFF) is a file format used for object code, executables, and shared libraries in various operating sys…
A .COM file is an executable file format used primarily in DOS and early Windows operating systems. It's one of the simplest executabl…
A CRX file is a package file format used by Chromium-based browsers like Google Chrome, Microsoft Edge, and others to distribute exten…
A .CMD file is a command script file used primarily by the Windows NT family of operating systems (Windows NT, 2000, XP, Vista, 7, 8, 10, and 11). It is simila…
The Common Object File Format (COFF) is a file format used for object code, executables, and shared libraries in various operating systems, particularly Unix-l…
A .COM file is an executable file format used primarily in DOS and early Windows operating systems. It's one of the simplest executable formats, typically limi…
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…
Everything you need to know about file extensions