File Extension Database

The extended reference book with specific data regarding more than 1 000 distinct file extensions.

Text Files

.1ST Readme File
.ASC ASCII Text File
.OFT Outlook File Template
.DOC Microsoft Word Document (before The 2007 Version)
.TXT Plain Text File
.RTF Rich Text Format File
.APT Almost Plain Text File

Audio Files

.M4A MPEG-4 Audio File
.S3M V3 Sound File
.CGRP Binary Audio Files
.MP3 MP3 Audio File
.MOD Amiga Music Module File
.WAV WAVE Audio File
.FLP FL Studio Project File

Video Files

.MKV Matroska Video File
.WEBM WebM Video File
.SWF Shockwave Flash Movie
.MP4 MPEG-4 Video File
.TS Video Transport Stream File
.AVI Audio Video Interleave File
.WMV Windows Media Video File

Compressed Files

.CBR Comic Book RAR Archive
.CBZ Comic Book Zip Archive File
.ZIP Zipped File
.GZ Gnu Zipped Archive
.RAR WinRAR Compressed Archive
.ACE WinAce Compressed File
.MINT Linux Mint Installer File

Spreadsheet Files

.XLS Microsoft Excel 97 To 2003 Spreadsheet
.XLSM Microsoft Excel Open XML Macro-Enabled Spreadsheet
.XL Excel Spreadsheet
.XLSX Microsoft Excel Open XML Spreadsheet
.OTS OpenDocument Spreadsheet Template
.DEF SmartWare II Data File
.CTS TreeSheets Hierarchical Spreadsheet

eBook Files

.AZW Amazon Kindle eBook File
.CBC Sony Portable Reader Comic E-book File
.FB2 FictionBook 2.0 File
.MOBI Mobipocket eBook Format
.EPUB Open eBook File
.AZW4 Amazon Print Replica eBook

.FB3 Primary FB3 File Association

Executable Files

.BAT DOS Batch File
.COM DOS Command File
.AHK AutoHotkey Script
.APK Android Package File
.APP macOS Application Bundle
.IPA Apple iOS Application
.JAR Java Archive File

Raster Image Files

.ICON Icon Image File
.GIF Graphical Interchange Format File
.MNR AutoCAD Menu Resource File
.DDS DirectDraw Surface
.DJVU DjVu Image
.WBC Webshots Collection File

Camera Raw Image Files

.NRW Nikon Raw Image File
.NEF Nikon Electronic Format Camera RAW Image
.RWL Leica D-Lux 4 RAW Image
.DCR Kodak Digital Camera RAW Image
.CR2 Canon Digital Camera Raw Image File
.ERF Epson RAW File
.CR3 Canon Raw 3 Image File

Vector Image Files

.VSDX Vector Image Files
.VSD Microsoft Visio Drawing File
.VSTM Microsoft Visio 2013 Macro-enabled Template File
.AI Adobe Illustrator File
.CDR CorelDRAW Vector Image File
.SVG Scalable Vector Graphics File
.EMF Enhanced Windows Metafile
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