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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.

50
Indexed file extensions
Popular searches:
.DOCX .7Z .AUTOCAD (DWG, DXF) .PDF .TXT .OBJ (.OBJ)

Find the right information for any file extension

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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50 extensions
Data Letter: S Clear all
.SXI

StarOffice Impress Presentation

The SXI file extension is primarily associated with StarOffice Impress, a presentation software component originally developed by Sun…

Data
.SYS

System File

A .SYS file is a system file used by Microsoft Windows and other operating systems. These files typically contain device drivers, hard…

Data
.SXI

StarOffice Impress Presentation

The SXI file extension is primarily associated with StarOffice Impress, a presentation software component originally developed by Sun Microsystems as part of t…

Data
.SYS

System File

A .SYS file is a system file used by Microsoft Windows and other operating systems. These files typically contain device drivers, hardware configurations, or c…

Data
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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.