List of All the File Extensions Formats and Types Starting With the Letter L
| File Extension | Description |
| .LACCDB | Microsoft Access 2007/2010 database lock |
| .LAM | Netscape Media Player streaming audio metafile |
| .LAMP | ArchiCAD for MAC Geometric Description Language |
| .LDB | IBM Works for OS/2 data filer database Lingoes backup Max Payne level Microsoft Access Record-Locking Information RPG Maker 2000/2003 database VisiTrax music library database |
| .LNK | Windows Shortcut 602Pro PC Suite Advanced Revelation database Linker response Playlist XNBC V8 Biological Neural Network Simulation Workstation link configuration |
| .LRC | Simple and enhanced Lyrics |
| .LUD | CARE-S InfoWorks land use |
| .LUE | Norton LiveUpdate log |
| .LUF | Lipikar Uniform Format |
| .LUM | Luminous song list |
| .LUV | Medieval 2 Total War |
| .LUXB | Lux Delux map |