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File Extensions

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.

3
Indexed file extensions
Popular searches:
.DOCX .7Z .AUTOCAD (DWG, DXF) .PDF .TXT .OBJ (.OBJ)

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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.

Search by extension Enter extensions like PDF, APK, DAT, HEIC, ZIP, or DOCX.
Browse categories Filter by documents, images, videos, archives, data, and more.
Open files safely Check file sources and use trusted software before opening unknown files.

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3 extensions
Executable Letter: M Clear all
.MACH-O

Mach Object File Format

The Mach-O (Mach Object) file format is a file format used by macOS, iOS, watchOS, and tvOS for executables, object code, shared libra…

Executable
.MLL

Autodesk Maya Link Library

The MLL file extension is primarily associated with Autodesk Maya, a professional 3D computer graphics application used for creating i…

Executable
.MSI

Microsoft Installer Package

The MSI file extension represents a Windows Installer package. It's a database file format used by the Windows Installer service for i…

Executable
.MACH-O

Mach Object File Format

The Mach-O (Mach Object) file format is a file format used by macOS, iOS, watchOS, and tvOS for executables, object code, shared libraries, dynamically loaded…

Executable
.MLL

Autodesk Maya Link Library

The MLL file extension is primarily associated with Autodesk Maya, a professional 3D computer graphics application used for creating interactive 3D application…

Executable
.MSI

Microsoft Installer Package

The MSI file extension represents a Windows Installer package. It's a database file format used by the Windows Installer service for installing, maintaining, a…

Executable

Frequently Asked Questions

Everything you need to know about file extensions

You can search by entering a file extension directly in the search bar or browse the directory by category or alphabetical index.

Each listing provides a definition of the file extension, common use cases, compatible software, supported platforms, and related or alternative formats.

The database is updated regularly to reflect new file extensions, changes in software compatibility, and evolving file format standards.