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

Audio Files

.MP3 MP3 Audio File
.FLP FL Studio Project File
.ABC ABC Music Notation
.MOD Amiga Music Module File
.M4A MPEG-4 Audio File
.BANK FMOD Audio Bank
.S3M V3 Sound File

Video Files

.SEC Samsung Security Video File
.CME Command Multimedia Evidence File
.MKV Matroska Video File
.SWF Shockwave Flash Movie
.WEBM WebM Video File
.SMI SAMI Subtitles File
.MP4 MPEG-4 Video File

Compressed Files

.CBR Comic Book RAR Archive
.CBZ Comic Book Zip Archive File
.ZIP Zipped File
.SPD S Note File
.SDC Secure Download Cabinet
.ACE WinAce Compressed File
.RAR WinRAR Compressed Archive

Spreadsheet Files

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

eBook Files

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

Executable Files

.COM DOS Command File
.PRG Program File
.AHK AutoHotkey Script
.APK Android Package File
.BAT DOS Batch File
.CGI Common Gateway Interface Script
.APP macOS Application Bundle

Raster Image Files

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

Camera Raw Image Files

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

Vector Image Files

.VSDX Vector Image Files
.CDR CorelDRAW Vector Image File
.SVG Scalable Vector Graphics File
.EMF Enhanced Windows Metafile
.INK InkML Image
.VSD Microsoft Visio Drawing File
.AI Adobe Illustrator File
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