File extension	The full name of the file	Popularity
File extension K25	Kodak K25 Image
File extension K26	Kurzweil K2600 File
File extension K2S	Kaiser 2 Saved Game
File extension K3B	K3b Disk Burning Project File
File extension K3G	3GP Mobile Phone Video File
File extension KAP	Maptech BSB map file
File extension KAR	Karaoke MIDI File
File extension KB	C++ Keyboard Script
File extension KB2	Kleo Backup File
File extension KBD	Keyboard Layout Script
File extension KBS	Keyboard Script File
File extension KCL	Mario Kart Collision File
File extension KDB	Keypass Database File
File extension KDBX	KeePass Password Database
File extension KDC	Kodak DC120 digital camera RAW image file
File extension KDE	KryptoStorage Container File
File extension KDENLIVE	Kdenlive Project File
File extension KDEVDLG	KDevelop Dialog Box File
File extension KDEVELOP	KDevelop Project Data File
File extension KDEVPRJ	KDevelop Project File
File extension KDI	KD Player Skin Image File
File extension KDK	Kodak Proprietary Decimated TIFF File
File extension KDMP	Windows Crash Dump File
File extension KDS	KD Player Skin File
File extension KDZ	Kaspersky Virus Bases File
File extension KEB	Kaspersky Virus Bases File
File extension KES	Kurzweil 3000 Document
File extension KEXI	Kexi Database
File extension KEXIC	Kexi Database Connection File
File extension KEXIS	Kexi Database Shortcut File
File extension KEXT	Mac OS X Kernel Extension
File extension KEY	Licence or encrypted security file
File extension KEY-TEF	Keynote iCloud Presentation
File extension KEYCHAIN	Mac OS X Keychain File
File extension KFM	Gamebryo 3D Model File
File extension KFN	KaraFun Karaoke File
File extension KFX	Kofax Image File
File extension KGB	KGB Archive File
File extension KHD	Dynamics AX Kernel Help Data File
File extension KHI	Dynamics AX Kernel Help Index File
File extension KIC	Kodak Compressed Image File
File extension KID	Kidspiration Document
File extension KIN	Kinetic Music Project
File extension KISMAC	KisMAC Webservice File
File extension KIT	20-20 Design File
File extension KIX	KiXtart Script File
File extension KLG	Log File
File extension KLQ	Kaspersky Anti-Virus quarantine file
File extension KMC	Kinemac Animation File
File extension KMCOBJ	Kinemac Sprite Object
File extension KML	Keyhole Markup Language File
File extension KMM	K-Meleon Macro Module
File extension KMP	Korg Trinity/Triton Keymap File
File extension KMR	KnowledgeMill Link File
File extension KMV	Mobile DJ Video File
File extension KMY	KMyMoney Data File
File extension KMZ	Google Earth Placemark File
File extension KNO	DigIN Serialized Break Model
File extension KNT	KeyNote Note File
File extension KO	Linux Kernel Module File
File extension KODAK	Kodak Photo CD File
File extension KODU	Kodu Game File
File extension KON	Yahoo! Widget XML File
File extension KOOB	Koob E-Book File
File extension KOR	Windows Korean Noise-Words List File
File extension KOZ	Audiokoz Music File
File extension KPF	Komodo Project File
File extension KPL	KMPlayer playlist file
File extension KPP	Kid Pix Presentation
File extension KPR	KPresenter Presentation
File extension KPX	Kid Pix Picture
File extension KPZ	Komodo Template File
File extension KRZ	Kurzweil K2000 File
File extension KS	Microsoft Works spreadsheet file
File extension KSC	Korg Trinity/Triton Script File
File extension KSF	Korg Trinity/Triton Sample File
File extension KSH	Unix Korn Shell Script
File extension KSM	Ken Silverman Music File
File extension KT2	Battery 2 Drum Kit File
File extension KT3	Battery 3 Drum Kit File
File extension KTH	Keynote Theme
File extension KTN	KTooN Animation Project File
File extension KTP	Kinetic Project Template
File extension KTZ	Kahootz Project File
File extension KV6	Ace of Spades Model File
File extension KVTML	KWordQuiz File
File extension KWD	KWord Document
File extension KWM	WebMoney Key File
File extension KWREPLAY	Command & Conquer 3 Replay File
File extension KYB	Keyboard Layout
File extension KYR	Lotus Domino Key Ring File
File extension KYS	Adobe Photoshop Keyboard Shortcuts File
File extension KZ	KuaiZip Compressed File