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File extension filetypes
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Website  EXT   Filetype description                                    
    FILExt  $DX  Ca Visual Objects Platform for Developer (CAVO) Backup Index File (CA) 
    FILExt  ~I  AZZ Cardfile Index (Antanas Zdramys
    TrID  ~I  AZZ Cardfile index 
 Header Hexdump:  3C 7E 41 5A 5A 20 43 41 52 44 46 49 4C 45 20 41  
    FILExt  ~SG  TAPCIS Message Index File 
    File Extensions  ~SG  TapCIS Message Index File 
    File Extensions  001-999  Database index files 
    FILExt  001  Superbase Index File (001-999) (Superbase Developers plc) 
    FILExt  ADI  Advantage Database Server Database Index File (Sybase Inc.) 
    File Extensions  ADI  Advantage Database Server index file 
    FileInfo  ADI  Dynamics AX Developer Documentation Index File 
    FILExt  ADX  Approach Index File (IBM) 
    FileInfo  ADX  Approach Index File 
    File Extensions  ADX  Database index file 
    TrID  ADX  Lotus Approach database index 
 Header Hexdump:  03 00 00 00 41 50 50 52 
    FileInfo  AHI  Dynamics AX Online Help Index File 
    FILExt  AIH  ArcView Optional Index File (ESRI
    File Extensions  AIH  Atribute index file 
    FILExt  AIN  ArcView Optional Index File (ESRI
    File Extensions  AIN  Atribute index file 
    File Extensions  AKW  A-Keywords (RoboHELP Help project index designer
    FILExt  AKW  RoboHELP Help Project Index File 
    FileInfo  ALI  Dynamics AX Label Index File 
    FILExt  ALX  Alpha Five Library Index (Alpha Software Inc.) 
    FileInfo  AOI  Dynamics AX Application Object Index File 
    FILExt  ASP  Photoshop Photo File Index (Adobe Systems Incorporated
    File Extensions  ASP  Photoshop photo file index 
    FILExt  ASX  Alpha Five Temporary Index (Alpha Software Inc.) 
    File Extensions  ASX  Alpha Five temporary index file 
    FILExt  AXD  Label Pro Re-Index (Avery
    File Extensions  AXD  Re-Index file 
    FILExt  BAG  PMMail 2000 Mail Index File (Blueprint Software Works
    File Extensions  BAG  PMMail 2000 Mail index file 
    FILExt  BAG  PMMail/2 Mail Index File (V.O.I.C.E. (Virtual OS/2 International Consumer Education)) 
    File Extensions  BAG  PMMail/2 Mail index file 
    FILExt  BCF  ConfigSafe Snapshot Index 
    File Extensions  BCF  ConfigSafe Snapshot Index 
    FILExt  BDX  JavaBib Index File 
    File Extensions  BDX  JavaBib index file 
    FILExt  BFI  Blaise Index (Statistics Netherlands
    FILExt  BIX  Index to a .BIB BibTeX Bibliography Database 
    FILExt  BKI  Backup Index 
    FILExt  BKI  IBM BookManager Backup Index 
    File Extensions  BKI  IBM BookManager Backup Index 
    FILExt  BKI  IBM Softcopy Reader (Bookmanager) Bookshelf (and Book) Index File (IBM) 
    TrID  BKI  IBM Softcopy Reader (Bookmanager) Bookshelf (and Book) index file 
 Header Hexdump:  00 00 00 00 F1 4B F2 40 
    FILExt  BMI  Blaise Index File (Statistics Netherlands
    File Extensions  BRX  file for browsing an index of multimedia options 
    FILExt  BRX  Multimedia Browsing Index 
    FILExt  BTR  FrontPage Binary-Tree Index (Microsoft Corporation
    TrID  BTR  FrontPage Binary-tree index 
 Header Hexdump:  1C 01 00 00 
    TrID  BTX  DB/TextWorks Database Term and Word Index 
 Header Hexdump:  42 54 58 20 30 30 35 20 
    FILExt  BTX  SEEDIS Index 
    FILExt  C2E  NJStar Chinese Word Processor Dictionary File Index (NJStar Software Corp.) 
    FILExt  CDX  Alpha Five Table Index (Alpha Software Inc.) 
    File Extensions  CDX  Alpha Five table index 
    Wikipedia  CDX  Compaund index file - Visual FoxPro 
    FileInfo  CDX  Compound Index File 
    File Extensions  CDX  Compound index file 
    TrID  CDX  Compound index MS Visual FoxPro
 Header Hexdump:  00 04 00 00 00 00 00 00 00 
    FILExt  CDX  Compound Index 
    File Extensions  CDX  FoxPro Compound index (database container
    FILExt  CDX  iAnywhere Index File (Sybase Inc.) 
    File Extensions  CDX  iAnywhere index file 
    FILExt  CDX  MicroStation Cell Library Index (Bentley Systems Incorporated
    File Extensions  CDX  MicroStation cell library index 
    File Extensions  CDX  Microstation Cell Library Index 
    FILExt  CDX  NovaBACKUP Backup Database Index (NovaStor Corporation
    File Extensions  CDX  NovaBACKUP backup database index 
    TrID  CDX  Sybase iAnywhere index files 
 Header Hexdump:  00 04 00 00 00 
    Cryer  CDX  Visual FoxPro compound index 
    FILExt  CDX  Visual Foxpro Index (Microsoft Corporation
    FILExt  CHI  Help File Index (Microsoft Corporation
    Cryer  CHI  Help file index 
    TrID  CHI  Windows HELP Index 
 Header Hexdump:  49 54 53 46 03 00 00 00 60 00 00 00 01 00 00 00 
    FileInfo  CHW  Compiled Help Index File 
    File Extensions  CHW  HTML Help general index funtional comparable with .gid 
    FILExt  CHW  HTML Help General Index Funtionally comparable to .GID. 
    Wikipedia  CIX  Database index - TCU Turbo C Utilities 
    File Extensions  CIX  Database index (Turbo C Utilities
    FILExt  CIX  TCU Turbo C Utilities Database Index 
    FILExt  DAS  PackRat Index 
    File Extensions  DAS  PackRat Index 
    FILExt  DB1  ImageDatabase Index to Image Database (A.I.Soft
    FILExt  DBX  Database Index 
    Wikipedia  DCX  DataBaseContainer Index - Visual FoxPro 
    FileInfo  DCX  FoxPro Database Index 
    Cryer  DCX  FoxPro database index 
    File Extensions  DCX  MS Visual Foxpro Database Container (DBC) Index file 
    File Extensions  DDX  Alpha Five data dictionary index 
    FILExt  DDX  Alpha Five Dictionary Index File (Alpha Software Inc.) 
    FILExt  DMS  Packrat Database Index 
    File Extensions  DMS  Packrat database index 
    FILExt  DMX  Medical Manager DML System Index for Custom .DME Files 
    FILExt  DRINDX  Indexer Index of FIles (DotRational Software
    FILExt  DTX  pfs:Q&A Index 
    FILExt  E2C  NJStar Chinese Word Processor Dictionary File Index (NJStar Software Corp.) 
    File Extensions  ECARD  eCard (Exchanage Card) format phone index or phone book format 
    FILExt  EIG  Easy Index Generator Project (Easy HTools Corporation
    FILExt  ESI  Escape Level Index (Tom Murphy VII) 
    FILExt  EVI  EchoView Index File 
    File Extensions  FBN  ArcView : spatial index file for read-only datasets 
    FILExt  FBN  ArcView Spatial Index File For Read-Only Datasets (ESRI
    File Extensions  FBX  ArcView : spatial index file for read-only datasets 
    FILExt  FBX  ArcView Spatial Index File For Read-Only Datasets (ESRI
    FILExt  FDI  FormDocs Index (Formdocs LLC) 
    FILExt  FDX  Force Index 
    File Extensions  FDX  Force Index 
    FILExt  FFA  Fast Find Status File (Index) (Microsoft Corporation
    FILExt  FFX  Fast Find Index (Microsoft Corporation
    TrID  FFX  Microsoft Fast Find Index v1.x 
 Header Hexdump:  4D 69 63 72 6F 73 6F 66 74 20 28 52 29 20 46 75  
    FileInfo  FFX  Microsoft Find Fast Index 
    File Extensions  FFX  MS Office Find Fast index file 
    FILExt  FIDX  Fiasco Database Index 
    TrID  FIDX  Fiasco Database: index File 
 Header Hexdump:  46 44 42 48 00 
    Wikipedia  FIT  File Index Table - WindowsNT 
    File Extensions  FIT  File Index Table (Windows NT) 
    FILExt  FIT  Windows NT File Index Table (Microsoft Corporation
    FILExt  FMP  Profit Plan Financial Master Plan Index (Security Development Corporation
    File Extensions  FT  Lotus Notes Full Test index 
    FILExt  FT  Notes Full Text Index (IBM) 
    File Extensions  FTB  Index file (Roots3
    FILExt  FTB  Roots3 Index File 
    Cryer  FTS  Help index file 
    FILExt  FTS  Windows Help Full-Text Search Index File (Microsoft Corporation
    TrID  FTS  Windows Help Full-Text Search index file 
 Header Hexdump:  74 66 4D 52 
    File Extensions  FTS  Windows Help index 
    File Extensions  GID  General index of a Win 95 help files 
    TrID  GID  GID Help index 
 Header Hexdump:  3F 5F 03 00 
    Wikipedia  GID  Help index - windows 95 help 
    Cryer  GID  Windows (help) global index 
    FILExt  GID  Windows Help Index File (Microsoft Corporation
    FileInfo  GID  Windows Help Index File 
    Cryer  GIX  MapServer sheet index file 
    File Extensions  H1K  Keyword index - Microsoft Windows Assistance Platform client help related file 
    FILExt  HBI  Handy Backup Backup Index File (Novosoft LLC) 
    Wikipedia  HDX  Help index - AutoCAD - Zortech
    File Extensions  HDX  Help index (AutoCAD/Zortech C++) 
    FILExt  HDX  Help Index 
    FILExt  HHK  HTML Help Index (Microsoft Corporation
    FileInfo  HHK  HTML Help Index 
    Cryer  HHK  HTML Help Workshop Index file 
    File Extensions  HHK  MS HTML Help Index 
    FILExt  HI  Spy-CD CD Search Index File 
    FILExt  HXK  Help 2 Keyword Index (Microsoft Corporation
    FILExt  HXK  Help TOC/Index File 
    FILExt  HXT  Help TOC/Index File 
    FILExt  HXW  Help 2 Merged Keyword Index (Microsoft Corporation
    FILExt  IBL  PCLTool Index-by-Location File (Page Technology Marketing Inc.) 
    FILExt  IC1  ZyIMAGE Index 
    Cryer  ID  MapInfo index file 
    FILExt  IDX  ArcView Geocoding Index For Read-Only Datasets (ESRI
    File Extensions  IDX  ArcView geocoding index for read-only datasets 
    Cryer  IDX  C-tree plus index file 
    FILExt  IDX  Ca Visual Objects Platform for Developer (CAVO) Index File (CA) 
    File Extensions  IDX  CA Visual Objects platform for developer (CAVO) index file 
    FILExt  IDX  Clip Gallery 1.x Index (Microsoft Corporation
    FILExt  IDX  Complete Works Index File (Toplevel Computing
    File Extensions  IDX  Complete Works index file 
    File Extensions  IDX  Corel QuickFinder index 
    FILExt  IDX  FoxPro Index (Microsoft Corporation
    Cryer  IDX  FoxPro index file 
    FileInfo  IDX  HMI Historical Log Index File 
    FILExt  IDX  ICQ Index (ICQ Inc.) 
    Wikipedia  IDX  Index - many - FoxPro 
    FileInfo  IDX  Index File 
    File Extensions  IDX  Index file 
    FILExt  IDX  Index 
    FILExt  IDX  Java Applet Cache Index (Sun Microsystems Inc.) 
    File Extensions  IDX  Java Applet cache index 
    TrID  IDX  Java Applet cache index 
 Header Hexdump:  10 00 
    File Extensions  IDX  LaTeX index file 
    FILExt  IDX  LaTeX Index 
    FILExt  IDX  Outlook Express Mailbox Index (Microsoft Corporation
    FileInfo  IDX  Outlook Express Mailbox Index File 
    FILExt  IDX  Pro/ENGINEER Index File (PTC) 
    File Extensions  IDX  Pro/Engineer index file 
    File Extensions  IDX  RCA Lyra handheld MP3 player database index 
    FILExt  IDX  RCA/Lyra Handheld MP3 Player Database Index (RCA) 
    File Extensions  IDX  Relational database index (Microsoft FoxPro
    FILExt  IDX  Symantec Q&A Relational Database Index File (Symantec Corporation
    File Extensions  IDX  Symantec Q&A relational database index file 
    TrID  IDX  VobSub Index file 
 Header Hexdump:  23 20 56 6F 62 53 75 62 20 69 6E 64 65 78 20 66  
    FILExt  IDX  VSFilter Index File 
    File Extensions  IDX  VSFilter index file 
    FileInfo  IDX0  Runescape Cache Index File 
    FILExt  IDY  Index File 
    File Extensions  IDY  Index file 
    Wikipedia  ILG  data - LaTeX Index Generation log 
    Cryer  IMH  Incredimail email index file 
    Wikipedia  IND  Data Index - dBASE IV 
    File Extensions  IND  dBASE IV or DataPerfect Index 
    FILExt  IND  Foxmail E-Mail Box Index 
    FILExt  IND  LaTeX or TeX Makeindx Index 
    File Extensions  IND  LaTeX or TeX makeindx index 
    File Extensions  IND  MapInfo index file 
    Cryer  IND  MapInfo index file 
    FILExt  IND  Windows/Applog Index 
    File Extensions  IND  windows/applog index 
    FILExt  IND  XMap Dataset Index (Delorme
    FILExt  INDEX  Index File 
    File Extensions  INDEX  Index file 
    FILExt  INFO  ZoomBrowser Image Index (Canon Inc.) 
    FileInfo  INFO  ZoomBrowser Image Index File 
    File Extensions  INFO  ZoomBrowser image index 
    File Extensions  INX  ACL for Windows index file 
    FILExt  INX  ACL for Windows Index 
    File Extensions  INX  Foxpro file index 
    FILExt  INX  Foxpro Foxbase Index 
    Wikipedia  INX  Index - Foxbase 
    Cryer  ISM  MySql index file 
    File Extensions  IST  MakeIndex (TeX) style index 
    FILExt  IST  TeX MakeIndex Style Index 
    FILExt  IVQ  MSDN InfoViewer 5.0 index full-text searches 
    File Extensions  IVQ  MSDN InfoViewer 5.0 index full-text searches 
    Wikipedia  IX  data - dtSearch index 
    FILExt  IX  FrameMaker Index File (Adobe Systems Incorporated
    File Extensions  IX  FrameMaker index file 
    File Extensions  IXC  ArcView : geocoding index for read-write coverages 
    FILExt  IXC  ArcView Geocoding Index For Read-Write Coverages (ESRI
    FILExt  IXC  Index+ for Windows Code Definition File (System Simulation Ltd.) 
    FILExt  IXF  Index+ for Windows Form Defintion File (System Simulation Ltd.) 
    FILExt  IXR  Index+ for Windows Report Definition File (System Simulation Ltd.) 
    File Extensions  IXS  ArcView : geocoding index for read-write shapefiles 
    FILExt  IXS  ArcView Geocoding Index For Read-Write Shapefiles (ESRI
    FILExt  JDX  EDICT Index 
    FILExt  JLP  JLIP Video Capture (Video Producer) Index Format Display (JVC) 
    File Extensions  K*  DataFlex index file 
    File Extensions  K1  DataFlex index file 
    File Extensions  K10  DataFlex index file 
    File Extensions  K11  DataFlex index file 
    File Extensions  K12  DataFlex index file 
    File Extensions  K13  DataFlex index file 
    File Extensions  K14  DataFlex index file 
    File Extensions  K2  DataFlex index file 
    File Extensions  K3  DataFlex index file 
    File Extensions  K4  DataFlex index file 
    File Extensions  K5  DataFlex index file 
    File Extensions  K6  DataFlex index file 
    File Extensions  K7  DataFlex index file 
    File Extensions  K8  DataFlex index f