.aif - AIF audio file
.cda - CD audio track file
.mid or .midi - MIDI audio file.
.mp3 - MP3 audio file
.mpa - MPEG-2 audio file
.ogg - Ogg Vorbis audio file
.wav - WAV file
.wma - WMA audio file
.wpl - Windows Media Player playlist
.7z - 7-Zip compressed file
.arj - ARJ compressed file
.deb - Debian software package file
.pkg - Package file
.rar - RAR file
.rpm - Red Hat Package Manager
.tar.gz - Tarball compressed file
.z - Z compressed file
.zip - Zip compressed file
.bin - Binary disc image
.dmg - macOS X disk image
.iso - ISO disc image
.toast - Toast disc image
.vcd - Virtual CD
.csv - Comma separated value file
.dat - Data file
.db or .dbf - Database file
.log - Log file
.mdb - Microsoft Access database file
.sav - Save file (e.g., game save file)
.sql - SQL database file
.tar - Linux / Unix tarball file archive
.xml - XML file
.apk - Android package file
.bat - Batch file
.bin - Binary file
.cgi or .pl - Perl script file
.com - MS-DOS command file
.exe - Executable file
.gadget - Windows gadget
.jar - Java Archive file
.py - Python file
.wsf - Windows Script File
.fnt - Windows font file
.fon - Generic font file
.otf - Open type font file
.ttf - TrueType font file
.ai - Adobe Illustrator file
.bmp - Bitmap image
.gif - GIF image
.ico - Icon file
.jpeg or .jpg - JPEG image
.png - PNG image
.ps - PostScript file
.psd - PSD image
.svg - Scalable Vector Graphics file
.tif or .tiff - TIFF image
.asp and .aspx - Active Server Page file
.cer - Internet security certificate
.cfm - ColdFusion Markup file
.cgi or .pl - Perl script file
.css - Cascading Style Sheet file
.htm and .html - HTML file
.js - JavaScript file
.jsp - Java Server Page file
.part - Partially downloaded file
.php - PHP file
.py - Python file
.rss - RSS file
.xhtml - XHTML file
.key - Keynote presentation
.odp - OpenOffice Impress presentation file
.pps - PowerPoint slide show
.ppt - PowerPoint presentation
.pptx - PowerPoint Open XML presentation
.c - C and C++ source code file
.class - Java class file
.cpp - C++ source code file
.cs - Visual C# source code file
.h - C, C++, and Objective-C header file
.java - Java Source code file
.sh - Bash shell script
.swift - Swift source code file
.vb - Visual Basic file
.ods - OpenOffice Calc spreadsheet file
.xlr - Microsoft Works spreadsheet file
.xls - Microsoft Excel file
.xlsx - Microsoft Excel Open XML spreadsheet file
.bak - Backup file
.cab - Windows Cabinet file
.cfg - Configuration file
.cpl - Windows Control panel file
.cur - Windows cursor file
.dll - DLL file
.dmp - Dump file
.drv - Device driver file
.icns - macOS X icon resource file
.ico - Icon file
.ini - Initialization file
.lnk - Windows shortcut file
.msi - Windows installer package
.sys - Windows system file
.tmp - Temporary file
.3g2 - 3GPP2 multimedia file
.3gp - 3GPP multimedia file
.avi - AVI file
.flv - Adobe Flash file
.h264 - H.264 video file
.m4v - Apple MP4 video file
.mkv - Matroska Multimedia Container
.mov - Apple QuickTime movie file
.mp4 - MPEG4 video file
.mpg or .mpeg - MPEG video file
.rm - RealMedia file
.swf - Shockwave flash file
.vob - DVD Video Object
.wmv - Windows Media Video file
.doc and .docx - Microsoft Word file
.odt - OpenOffice Writer document file
.pdf - PDF file
.rtf - Rich Text Format
.tex - A LaTeX document file
.txt - Plain text file
.wks and .wps- Microsoft Works file
.wpd - WordPerfect document