K
| 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) | ITune 1000.Corp |
| 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 | KeePass |
| KDBX | KeePass 2.x database file | KeePass |
| 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 | |
| KFN | complex music format| | Karafun Karaoke(R) |
| KFX | Kofax Group | GCGW |
| KIT | Power Chords drum kit file | Power Chord |
| KMC | KatzReview's MegaCrammer | |
| KML | Kedit Macro Library Keyhole Markup Language |
Kedit Google Earth |
| KMY | data | KMyMoney |
| KMZ | Keyhole Markup Language (Zip compressed) | Google Earth |
| Knn | Database key file | Clarion |
| KNO | Personal Knowbase data file | Personal Knowbase |
| KPL | source code | Phrogram |
| KPP | Toolpad | SmartPad |
| KPS | IBM KIPS bitmap graphics | |
| KR1 | Kurzweil 2000 sample file | AWAVE |
| KR2 | Kurzweil 2000 sample file | AWAVE |
| KRZ | Kurzweil K2000 File | Kurzweil |
| KS | Source code | KonsolScript Document |
| 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 |
Read more about this topic: List Of File Formats (alphabetical)