File extension	The full name of the file	Popularity
File extension N	Neko Bytecode File
File extension N-GAGE	N-Gage Application
File extension N2	Nitrous Minecraft GLSL Shader File
File extension N3D	Nuclear 3D File
File extension N3PMESH	Knight Online 3D Mesh File
File extension N64	Nintendo 64 Emulator ROM File
File extension NA2	Netscape Address Book File
File extension NAM	DMAP spreadsheet file
File extension NAP	NAPLPS Vector image metafile
File extension NARC	Nintendo DS Archive File
File extension NAV	Id Tech 3 Bot Navigation File
File extension NAV2	WinAVI Temporary Navigation File
File extension NAZ	Total Overdose Game Data File
File extension NB	Mathematica Notebook
File extension NB0	Google Android compiled ROM file
File extension NB7	NovaBACKUP Output File
File extension NBA	Nero BackItUp Archive
File extension NBC	Next Byte Codes Source Code File
File extension NBD	NovaBACKUP File
File extension NBE	Nessus Report File
File extension NBF	Backup NOW! backup archive file
File extension NBH	ROM Update Utility Image File
File extension NBI	Nero BackItUp Information File
File extension NBK	NovaBACKUP Job File
File extension NBM	NetBeans Module
File extension NBP	Mathematica Player Notebook File
File extension NBS	Minecraft Note Block Studio File
File extension NBT	Minecraft Named Binary Tag File
File extension NBU	Nokia Phone Backup File
File extension NC	Unidata Network Common Data form file
File extension NCB	Visual C++ IntelliSense Database
File extension NCD	NTI CD-Maker disk image
File extension NCF	No Cache File
File extension NCFG	ArcGIS Explorer Configuration File
File extension NCGR	Nintendo DS Title Graphics File
File extension NCH	Outlook Express Folder File
File extension NCLR	Nintendo DS Color Palette File
File extension NCO	Nero BackItUp File
File extension NCOR	Adobe Encore Project File
File extension NCORX	Adobe Encore Project
File extension NCR	NCR Image
File extension NCT	Nero CoverDesigner Template
File extension NCW	Nero CoverDesigner picture template file
File extension NCX	EPUB Navigation Control XML File
File extension ND	QuickBooks Network Data File
File extension ND5	Renamed NDS File
File extension NDB	ClamAV Extended Signature File
File extension NDC	Personal Communications Settings File
File extension NDF	SQL Server Secondary Database File
File extension NDIF	Apple NDIF disk image file
File extension NDK	Lotus Notes Design Elements File
File extension NDL	Lotus Notes Doclink File
File extension NDOC	Naver Word
File extension NDS	Nintendo DS Game ROM
File extension NDX	dBASE Index File
File extension NED	OMNeT++ Network Description File
File extension NEF	Nikon Electronic Format RAW Image
File extension NEKO	Neko Source Code File
File extension NEO	NeoChrome Bitmap Image
File extension NES	Nintendo (NES) ROM File
File extension NESSUS	Nessus Network Security Scanner File
File extension NET	Network configuration file
File extension NETA	Netica Binary File
File extension NETSPD	NetSpot Survey Project File
File extension NETSPM	NetSpot Map File
File extension NETWORKCONNECT	Apple Network Connect Document
File extension NEU	Pro/ENGINEER Neutral File
File extension NEXE	Chrome Native Client Executable
File extension NFB	Nokia Phone Backup File
File extension NFC	Nokia Phone Backup Copy File
File extension NFF	Neutral File Format
File extension NFI	Dreambox Disc Image
File extension NFL	AutoCAD multiline filter list
File extension NFM	Delphi .NET Form File
File extension NFO	Warez Information File
File extension NFS	Network File System Temporary File
File extension NFS11SAVE	Need for Speed: Hot Pursuit Save File
File extension NFTR	Nintendo DS Font Type File
File extension NGAGE	N-Gage Game File
File extension NGC	Xilinx Generated Netlist File
File extension NGD	NimbleGen gene description file
File extension NGP	NeoGeo Pocket ROM
File extension NGT	Noni GPSPlot Track File
File extension NIB	Interface Builder User Interface File
File extension NICK	Outlook 2000 Nickname File
File extension NIF	Gamebryo Model File
File extension NIM	Nimrod Source Code File
File extension NITF	National Imagery Transmission Format File
File extension NJB	Nikon Photo Index File
File extension NJI	Nero Job Information File
File extension NJX	NJStar Document
File extension NK	NUKE Script
File extension NK2	Outlook 2002 Nickname File
File extension NKB	Kontakt Audio Bank
File extension NKC	Kontakt Library Data File
File extension NKI	KONTAKT Instrument File
File extension NKM	Kontakt Multi Instrument File
File extension NKP	Kontakt Presets File
File extension NKS	Kontakt Monolith Container
File extension NKX	Kontakt Monolith Container File
File extension NLELEM	NoLimits Track Element File
File extension NLM	Nokia Logo File
File extension NLOGO	NetLogo Model File
File extension NLOGO3D	NetLogo 3D Model File
File extension NLPX	NoLimits Package
File extension NLS	Microsoft National Language Support File
File extension NLTRACK	NoLimits Roller Coaster Track File
File extension NM	Space Engine Nebula Model File
File extension NM2	Navitel Map File
File extension NM3	Navitel 5 Map File
File extension NMAP	NaviComputer Map File
File extension NMBTEMPLATE	Numbers Spreadsheet Template
File extension NMC	ArcGIS Explorer Map Content File
File extension NMF	ArcGIS Explorer Map File
File extension NMIND	NovaMind Mind Map File
File extension NML	Traktor Collection File
File extension NMP	Neopaint Mask image file
File extension NN	Nero CD File List
File extension NNI	ANNI Neural Network Investing File
File extension NNP	ANNI Neural Network Portfolio File
File extension NOD	NetObjects Fusion File
File extension NOMEDIA	Android No Media File
File extension NOT	Notation File
File extension NOTE	Notability for iPad note file
File extension NOTEBOOK	SMART Notebook File
File extension NOTES	Memento Notes File
File extension NOW	Readme File
File extension NP	Portfolio NetPublish File
File extension NPF	NTI Partition File
File extension NPFX	Norton Internet Security Firewall Settings File
File extension NPL	Nokia Playlist File
File extension NPP	Art Explosion Publisher Pro Document
File extension NPR	Nuendo Project File
File extension NPS	NTI Partition Set
File extension NPT	Navicat for MySQL data transfer profile file
File extension NQC	Not Quite C Source Code File
File extension NRA	Nero Audio Compilation
File extension NRB	Nero CD-ROM Boot Compilation
File extension NRC	Nero Disc Compilation File
File extension NRD	Nero DVD-Video Compilation File
File extension NRG	Nero CD/DVD Image File
File extension NRI	Nero ISO CD Compilation File
File extension NRL	Autonomy Interwoven Link File
File extension NRM	Nero Mixed Mode CD Compilation
File extension NRS	Nero CD-ROM Boot EFI compilation file
File extension NRT	Nokia Ringtone
File extension NRU	Nero UDF CD-ROM Compilation
File extension NRW	Nikon Raw Image File
File extension NS2	Lotus Notes 2 Database
File extension NS3	Lotus Notes 3 Database
File extension NS4	Lotus Notes 4 Database
File extension NSA	Nullsoft Streaming Audio File
File extension NSBCA	Nintendo DS Model Animation File
File extension NSBMD	Nintendo DS Model File
File extension NSBTA	Nintendo DS Texture Animation File
File extension NSBTX	Nintendo DS Model Texture File
File extension NSCR	Nintendo DS Title Screen File
File extension NSF	Lotus Notes Database
File extension NSH	NSIS Header File
File extension NSI	NSIS Script
File extension NSQ	NScheduler Data File
File extension NSR	Nessus Security Report File
File extension NSS	Magentic Screensaver File
File extension NST	NoiseTracker Module
File extension NSV	Nullsoft Streaming Video File
File extension NT	Windows NT Startup File
File extension NTC	Camera Control Pro Custom Curves File
File extension NTF	Lotus Note Template
File extension NTFS	NTFS Partition File
File extension NTH	Nokia Series 40 Theme File
File extension NTN	NOTION Song File
File extension NTRK	Pacific FIghters Online Track File
File extension NTS	Lotus Notes Traveler Server Config File
File extension NTX	Clipper database index file
File extension NUMBERS	Numbers Spreadsheet File
File extension NUMBERS-TEF	Numbers iCloud Document
File extension NUP	Smart Security Update File
File extension NUPKG	NuGet Package
File extension NUSPEC	NuGet Specification File
File extension NUT	NUT Video File
File extension NUV	NuppelVideo File
File extension NV	MAME NVRAM File
File extension NV2	NewViews 2 Database File
File extension NVC	NeroVision Express Project File
File extension NVDL	NVDL Script
File extension NVF	Creative Labs NVF Audio File
File extension NVI	NVIDIA Driver File
File extension NVL	UniChem Results File
File extension NVM	PlayStation 2 BIOS Configuration File
File extension NVRAM	VMware NVRAM File
File extension NWC	NoteWorthy Composer File
File extension NWCTXT	NoteWorthy Composer Text File
File extension NWD	Navisworks Document
File extension NWF	Navisworks File Set
File extension NWM	Sony NWM Display Screen File
File extension NWP	Noteworthy Player file type
File extension NWS	Windows Live Mail Newsgroup File
File extension NWV	Dragon NaturallySpeaking User Archive
File extension NXC	Not eXactly C Source Code File
File extension NXG	eSite Builder NXG Web Page
File extension NY	Audacity Nyquist Plug-in
File extension NYF	myBase Database File
File extension NZB	NewzBin Usenet Index File