Ext. | Description | Used by |
J2C | JPEG 2000 image | |
JAM | Jam messagebase | FTN software |
Jam music score | ||
JAR | Archive | JAR. Java Games and Applications |
JAS | see JASC | |
JASC | Graphics format (JASC) | |
JAV | see JAVA | |
JAVA | Java source code file | |
JBD | Datafile | |
JBIG | Joint Bilevel Image Group | |
JBX | Project file | Project Scheduler 4 |
JCN | JobClock.Net Synch File | |
JET | Fax | Hybrid JetFax |
JFF | see JFIF | |
JFIF | JPEG File Interchange Format | |
JIF | see JFIF | |
JMS | Music format (JMusic file) | UltraForce |
JOB | Gravostyle engraving pattern file | |
JOB | QUEUE output file | |
JOR | Journal file SQL | |
JOU | Journal backup | VAX Edt editor |
JP2 | JPEG 2000 image | |
JPC | Graphics | Japan PIC |
Joint Photography Experts Group graphics file format | QPeg - FullView - Display | |
JPG | see JPEG | |
JRE | Java Runtime Environment | Java |
JRN | JMP journal | JMP |
JSP | Java Server Pages | |
JS | JScript script file | Javascript |
JTF | Fax | Hayes JT Fax |
JTF | Graphics (TIFF file with JPEG compression) | |
JK | Root File of a lol | Earl Grey |
JVX | Data | JavaView object |
JW | Text document | JustWrite |
JWL | Library | JustWrite |
JZZ | Spreadsheet | Jazz |
Ext. | Description | Used by |
K2A | Data | Prince of Persia 3D object |
K3D | Description of macro language 3DS | 3DS |
KAP | Map Info Sea Chart | |
KAR | Music format (Karaoke) | |
KAR | Precompiled .prg for KARAT | Rus. FOX+ 2.0 |
KB | Keyboard script | Borland C++ 4.5 |
KB | Program source | Knowledge Pro |
KBASIC | Source | KBasic |
KBD | Keyboard mapping | LocoScript - Signature - Procomm Plus |
KBM | Keyboard mapping | Reflection 4.0 |
KCL | Lisp source code | Kyoto Common Lisp |
KDB | KeePass 1.x database file | |
KDBX | KeePass 2.x database file | |
KDC | Kodak Digital Camera (graphics) | PhotoEnhancer by PictureWorks |
KEP | (unknown) | (unknown) |
KEX | Kedit Macro File | Kedit |
KEY | Datafile | Forecast Pro |
KEY | Keynote presentation file | Keynote (Apple iWork '08) |
KEY | Keyboard macros | |
KEY | OS/2 archive .key-file (i.e. OS2.KEY) | OS/2 |
KEY | Security file e.g. Shareware Registration info | |
KFX | Kofax Group | GCGW |
KIT | Power Chords drum kit file | Power Chord |
KMC | ||
KML | ||
KMY | data | |
KMZ | Keyhole Markup Language (Zip compressed) | |
Knn | Database key file | Clarion |
KNO | Personal Knowbase data file | Personal Knowbase |
KPL | source code | |
KPP | Toolpad | SmartPad |
KPS | IBM KIPS bitmap graphics | |
KR1 | AWAVE | |
KR2 | Kurzweil 2000 sample file | AWAVE |
KRZ | Kurzweil K2000 File | Kurzweil |
KS | Source code | |
KS3 | Data | 3D Forgastest Editor object |
KTU | Know The Unknown Online Service Packs | Unknownsoft |
KWB | Knowledge WorkBench | Prodeo |
KYB | Keyboard mapping | FTP Software PC/TCP |
Ext. | Description | Used by |
L | LEX source code file | |
L | Linker directive file | WATCOM wlink |
L | LISP source code file | |
LA0 | Datafile | |
LAB | Datafile | NCSS - SOLO |
LAB | Mailing labels | |
LAN | Erdas image file | |
LAN | LAN Drivers | Novell NetWare |
LAY | Word chart layout | APPLAUSE |
LBG | Label generator data | dBASE IV |
LBL | Label | dBASE IV - Clipper 5 - dBFast |
LBM | Graphics format (Amiga) | Pic-view - Deluxe Paint |
LBM | Linear bitmap graphics | XLib |
LBO | Compiled label | dBASE IV |
LBR | forCP/M and MS-DOS using the LU program | |
LBR | Display driver | Lotus 1-2-3 |
LBT | Additional (FPT) label description file | FoxPro |
LBX | Main (DBF) label description file | FoxPro |
LCF | Linker Control File | Norton Guides compiler |
LCH | Chart | IBM Works for OS/2 |
LCK | Lockfile | Paradox |
LCL | Data (FTP Software PC/TCP) | |
LCL | Data | FTP Software PC/TCP |
LCN | Lection | WordPerfect |
LCS | Datafile | ACT! History Files |
LCW | Spreadsheet | Lucid 3-D |
LD | Long Distance codes file | Telix |
LDA | Absolute binary file (load image) | PDP-11, RT-11 |
LD1 | Overlay file | dBASE |
LDB | Data filer database | IBM Works for OS/2 |
LDB | Overlay file | |
LDF | Data filer form | IBM Works for OS/2 |
LDF | Library definition file | Geoworks Glue |
LE | DOS/4GW executable image | DOS/4GW PM 32X DOS Extender |
LES | Lesson (check *.cbt) | |
LEV | Level file | NetHack 3.x |
LEX | Dictionary | |
LFL | LucasArts resource file | |
LFD | LucasArts resource file | LucasArts games |
LFT | Laser printer font | ChiWriter |
LG | Logo procedure definitions | LSRHS Logo |
LGO | Logo for header and footer | SuperFax |
LGO | Startup logo code | Windows 3.x |
LHA | Archive | LHA/LHARC |
LHW | Amiga archive | LHWARP |
LIB | Library file | several programming languages |
LIC | License file used by some programs to put their license on disk | |
LIF | Archive | |
LIF | CA Clipper packed file | CA Clipper installer |
LIF | Logical Interchange Format data file | Hewlett-Packard |
LIM | Archive | LIMIT |
LIN | Line types | AutoCAD |
LIS | Listing | VAX |
LIT | Web3D File | Web3D |
LIX | Log file (history) | Audit Command Language (ACL) |
LJ | Text file for HP LJ II printer | |
LL3 | LapLink III related file (document) | LapLink III |
LM | Auran Jet LOD mesh table (text file to control LODs) | Trainz |
LMP | Doom lump (data file, commonly "demo" recordings) | Doom - Doom2 |
LNG | Language definition file | |
LNK | Linker response file | .RTLink |
LNK | Linker script | |
LNK | Windows 95 shortcut | Windows 95 |
LNK | Windows XP shortcut | Windows XP |
LOD | Load file | |
LOG | Log file | Numerous systems |
LOM | 3D Model | |
LPC | Printer driver | TEKO |
Lyrics data | ||
LRF | Linker response file | Microsoft C/C++ |
LRF | Unencrypted BroadBand eBook file | Sony Librie eBook reader |
LRP | Report | IBM Works for OS/2 |
LRS | Language Resource File | WordPerfect for Win |
LRX | Encrypted BroadBand eBook file | Sony Librie eBook reader |
LSA | Lightscape Technologies ASCII | |
LSB | Lightscape Technologies Binary | |
LSP | LISP source code file | Xlisp, AutoLISP |
LSS | Spreadsheet | Legato - IBM Works for OS/2 |
LST | Aus. BOM Hourly weather Data | |
LST | Filelist | FRQView |
LST | Keyboard macro | 1st Reader |
LST | List file (archive index - compiler listfile) | |
LST | Listing (e.g. source code) | |
LST | Map list | Holux - Alan |
LST | Spool file | Oracle |
LST | SLP output file | |
LTA | Data | LithTech ASCII 3D object |
LTM | Form (Lotus Forms) | Lotus |
LUA | Lua script file | Microsoft Visual C++, Notepad++ |
LUW | label data file | Labels Unlimited for Windows |
LUX | 2D and 3D graphics data file | Foliomap and Spectramap |
LUZ | 3D graphics data file | Spectramap CUDA |
LWD | Text document | LotusWorks |
LWO | Lightwave Object Format | |
LWP | Word processor | IBM Works for OS/2, Lotus Wordpro |
LXF | Lego Exchange Format | Lego Digital Designer data file |
LXO | Luxology scene | |
LXT | Temporal database file | GTKWave data file |
LY | LilyPond Notation File | |
LYR | Lyrics (ASCII) | |
LZ | Archive | Lzip |
LZD | Difference file for binaries | LDiff 1.20 |
LZH | Archive | LHA/LHARC |
LZS | Archive | LARC |
LZW | Archive | LHWARP |
LZX | Amiga Archive |
