Common File Extensions & Programs
EXTENSION DESCRIPTION PROGRAMS TO OPEN .doc / .docx Microsoft Word document Microsoft Word, Google Docs, LibreOffice Writer .xls / .xlsx Microsoft Excel spreadsheet Microsoft Excel, Google Sheets, LibreOffice Calc .ppt / .pptx Microsoft PowerPoint presentation PowerPoint, Google Slides, LibreOffice Impress .pdf Portable Document Format Adobe Acrobat Reader, browsers (Chrome, Edge), Foxit Reader .txt Plain text file Notepad, WordPad, any text editor .csv Comma-separated values Excel, Google Sheets, LibreOffice Calc .jpg / .jpeg JPEG image Photoshop, Paint, Windows Photos, any image viewer .png PNG image (transparency support) Photoshop, Paint, browsers, any image viewer .gif Animated or static image Browsers, Photoshop, Paint, GIF viewers .bmp Bitmap image Paint, Photoshop, Windows Photos .mp3 Audio file VLC, Windows Media Player, iTunes .wav Audio file (high-quality) VLC, Windows Media Player, iTunes .mp4 Video file VLC, Windows Media Player, QuickTime, any browser .mov Apple QuickTime video QuickTime, VLC, Windows Media Player .avi Video file VLC, Windows Media Player, QuickTime .zip Compressed archive WinRAR, 7-Zip, Windows Explorer .rar Compressed archive WinRAR, 7-Zip .exe Windows executable program Windows OS (runs program) .msi Windows installer package Windows Installer .html / .htm Web page Browser (Chrome, Edge, Firefox), text editor .css Stylesheet for web pages Text editor, browser (renders style) .js JavaScript file Browser, text editor .json Data file (apps or APIs) Text editor, specialized apps .xml Data markup file Text editor, browsers, data apps .iso Disk image Virtual drive software, burning software .dll Windows library file Used by programs (not directly opened) .psd Photoshop project file Adobe Photoshop .ai Adobe Illustrator file Adobe Illustrator .eps Vector graphics Adobe Illustrator, CorelDRAW .rtf Rich Text Format Word, WordPad, LibreOffice Writer .log Log file Text editor, specialized apps .bak Backup file Depends on the original software .torrent Torrent file BitTorrent clients (uTorrent, qBittorrent) .apk Android app package Android devices, emulators .dmg Mac OS disk image macOS Finder .key Keynote presentation (Apple) Apple Keynote, iWork .pages Pages document (Apple) Apple Pages .numbers Numbers spreadsheet (Apple) Apple Numbers