List of filename extensions / L
This list contains common file name extensions that are used in some operating systems to differentiate between file formats . In other operating systems, file type identification is mainly carried out using the file header, and the MIME type is more important than the file name extension for e-mail attachments . Systems that use the latter two approaches usually ignore the extension completely.
| Filename extension | MIME type | Full name | Remarks, usage |
|---|---|---|---|
| .l | Linker directive file | WATCOM wlink | |
| .l | Lex | Lex source code | |
| .l | Lisp | LISP source code | |
| .lab | Data file | NCSS-SOLO | |
| .lab | Label file | Visual dBase | |
| .lab | Mailing labels | Microsoft Excel | |
| .lan | LAN driver | Novell NetWare Loadable module | |
| .lay | Clipart file | Printmaster Gold | |
| .lay | Word chart layout | APPLAUSE | |
| .lbg | Label generator data | dBase IV | |
| .lbk | PlotMaker layout book file | ArchiCAD | |
| .lbl | Label | Clipper 5 | |
| .lbl | Label | dBase IV | |
| .lbl | Label | dBFast | |
| .lbm | audio / x-liveaudio | Interleaved Bitmap (ILBM) | Image file, see also IFF |
| .lbo | Compiled label | dBase IV | |
| .lbo | MWM Libero Project | MWM Libero (application for quantity determination according to REB) | |
| .lbr | LBR archive (LU) | compressed file archive | |
| .lbr | Display driver | Lotus 1-2-3 driver | |
| .lbr | Device library | Cadsoft EAGLE | |
| .lbt | Labels | Microsoft FoxPro | |
| .lbx | Labels | Microsoft FoxPro | |
| .lca | LABCAR Assistant file | LABCAR-OPERATOR project from ETAS | |
| .lcf | Library Container File | ArchiCAD | |
| .lcf | Linker control file | Norton Guides compiler | |
| .lck | Lockfile | paradox | |
| .lcl | Data file | FTP | |
| .lcp | LAPI Configuration Project | LAPI homepage | |
| .lcn | Lesson document | WordPerfect for Windows | |
| .lcs | Data history file | ACT! | |
| .lcw | Spreadsheet | Lucid 3-D | |
| .ld | Long distance area codes | Telix | |
| .ld1 | Overlay file | dBase | |
| .ldb | Lock file | Microsoft Access | |
| .ldf | Library definition file | Geoworks Glue | |
| .ldf | Log data file | Protocol file for database transactions of Microsoft SQL Server | |
| .ldf | LIN Description File | Description file of a LIN bus | |
| .ldi | LAN driver description file | required for .lan LAN driver from Novell NetWare | |
| .ldif | Address directory | Microsoft, Netscape and others | |
| .ldl | Library | Corel Paradox | |
| .lef | LEN Exchange Format | Swimming data | |
| .leg | Legacy document | - | |
| .les | System game profiles | entertainment | |
| .lev | Level file | NetHack 3.x, Elasto Mania | |
| .lex | Dictionary file | Generic | |
| .current | Data resource file | LucasArts Dark Forces | |
| .lfg | lexical-functional grammar | Grammar file , Xeroc Linguistic Environment | |
| .lfp | LaserForms Plus file | Evergreen | |
| .lft | Laser printer font | ChiWriter | |
| .lft | Loft file | 3-D studios | |
| .lg | Logo procedure definition | LSRHS logo | |
| .lgc | Application log file | - | |
| .lgd | Application log file | - | |
| .lgo | Header and footer logo | SuperFax | |
| .lgo | Lego model file | Lego digital designer | |
| .lgo | Logo file | Paint brush | |
| .lgo | Startup logo | Microsoft Windows 3.x-9.x | |
| .lha | application / lha, application / octet-stream, application / x-lha | LHA / LHARC | compressed file archive |
| .lhs | Literate Haskell File | Haskell source code in literate format | |
| .lhw | LHWARP | compressed file archive (Amiga) | |
| .lib | Library | Program library (DOS, Windows, OS / 2) | |
| .library | Library | Program library (Amiga) | |
| .lif | - | compressed file archive | |
| .lif | Logical interchange data | Hewlett-Packard | |
| .lim | LIMIT | compressed file archive | |
| .lin | Interactive music sequencing data | Electronic Arts | |
| .lin | Line type file | DataCad | |
| .lis | text / plain | Listing | VAX |
| .lis | SQL report | - | |
| . lit | ( Lit erature) | HTML-based document format from Microsoft for electronic books for Microsoft Reader | |
| .lix | Logos library system file | - | |
| .lip | Lip movements | Oblivion, describes the lip movements suitable for a voice recording | |
| .lj | Text file | Hewlett-Packard LaseJet II printer | |
| .lk | Database file | OpenSight-16 bit | |
| .lko | Linked object | Microsoft Outlook Express junk mail file | |
| .ll3 | Document file | LapLink III | |
| .llx | Exchange agent | Laplink | |
| .lnk | Data file | Revelation | |
| .lnk | Linker response file | RTLink | |
| .lnk | L i nk | (Symbolic) file link in Windows | |
| .load | z / OS load library | Library of executable programs | |
| .loc | Locations | Waypoint file | |
| .lock | Lock | Lock file, prevents the simultaneous writing of a resource by several processes | |
| .lod | Load file | - | |
| .log | text / x-log | log | Log file in which a program or the kernel records information about various events in a human- readable way |
| .log |
|
Log file | simple text files in which a ( Windows ) program logs information about actions (critical processes, crashes, etc.) |
| .log | text / plain | Logo source file | Source code files of the programming language Logo |
| .logo | Combined Logo Mask | File for TV recordings in the Vista MediaCenter | |
| .loc | compressed | FileWrangler | |
| .lol | Lolcode | Source code for the esoteric programming language LOLCODE | |
| .lp | - | DesertDocs | |
| .lpc | Printer driver | TEKO | |
| .lpd | Helix Nuts and Bolts file | - | |
| .lpd | LabelPro file | Graphics file (Avery-Zweckform LabelPro 2.0-3.0) | |
| .lpd | LECTURNITY player file | Player for e-learning content | |
| .lpd | Lösomat test station document | - | |
| .lpi | Information file for laser printers | Used in some scanner tools | |
| .lpj | PASSOLO project file | ASCII (up to PASSOLO 5) | |
| .lps | LupoScan | 3D laser scan data format | |
| .lpu | PASSOLO project file | Unicode | |
| .lpz | Lösomat test station certificate | ||
| .lrc | Video phone file | Intel | |
| .lrf | Linker response file | Microsoft C ++ and Microsoft C | |
| .lrs | Language resource file | WordPerfect for Windows | |
| .lsf | Logos library system file | - | |
| .lsl | Saved library | Corel Paradox | |
| .lsl | Script library | lotus | |
| .lso | Logic Audio Song / Document | Work file for (formerly Emagics, now Apple) Logic Audio or Logic Pro | |
| .lsp | application / x-lisp, text / x-script.lisp | LISP | AutoLISP, CommonLISP, and others |
| .lss | Spreadsheet | Legato | |
| .lst | Keyboard macro | 1st reader | |
| .lst | text / plain | List file | Generic |
| .lst | Spool file | Oracle | |
| .ltm | shape | Lotus forms | |
| .lu | Library unit file | ThoughtWing | |
| .lua | Lua file extension | Scripting | |
| .lvl | Miner Descent / D2 Level extension | Parallax software | |
| .lwd | Text document | LotusWorks | |
| .lwf | L ura W ave F ormat | Wavelet graphic file from Luratech | |
| .lwlo | Layered Object File | Lightwave | |
| .lwob | Object file | Lightwave | |
| .lwp | Lotus Word Pro (part of Lotus SmartSuite ) | Text document | |
| .lwsc | Scene file | Lightwave | |
| .lwz | Linguistically enhanced sound | Microsoft | |
| .lxf | Lego Digital Designer file | File containing Lego blueprints. | |
| .lxf | LEN Exchange Format | Swimming data | |
| .ly | LilyPond file | ASCII file that LilyPond can convert into musical notation. | |
| .lyr | Layer file | DataCAD | |
| .lyx | LyX file | File format of the LyX word processing program | |
| .lzd | Difference file for binaries | Ldiff 1.20 | |
| .lzh | application / octet-stream, application / x-lzh | LH ARC | compressed file archive |
| .lzma | application / x-lzma | compressed file archive | |
| .lzs | LARC | compressed file archive | |
| .lzs | Data file | Skyroads | |
| .l or | LHWARP | compressed file archive (Amiga) | |
| .lzx | application / lzx, application / octet-stream, application / x-lzx | - | compressed file archive |