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File Extension Database

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

Text Files

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

Audio Files

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

Video Files

.SEC Samsung Security Video File
.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

Compressed Files

.CBR Comic Book RAR Archive
.CBZ Comic Book Zip Archive File
.ZIP Zipped File
.ACE WinAce Compressed File
.RAR WinRAR Compressed Archive
.SDC Secure Download Cabinet
.DAR DAR Disk Archive File

Spreadsheet Files

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

eBook Files

.FB2 FictionBook 2.0 File
.AZW Amazon Kindle eBook File
.MOBI Mobipocket eBook Format
.CBC Sony Portable Reader Comic E-book File
.EPUB Open eBook File
.FB3 Primary FB3 File Association
.AZW4 Amazon Print Replica eBook

Executable Files

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

Raster Image Files

.DJVU DjVu Image
.BIF Ventana Whole Slide Image
.ICON Icon Image File
.GIF Graphical Interchange Format File
.DDS DirectDraw Surface
.MNG Multiple Network Graphic

Camera Raw Image Files

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

Vector Image Files

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