| Extension |
File Type |
File Description |
| .n3pmesh | Game | Knight Online 3D Mesh File |
| .n64 | Game | Nintendo 64 Emulator ROM File |
| .nap | Audio | Napster Secured Music File |
| .nav | Image | MSN Application Extension (Most common) |
| .nav2 | Misc | WinAVI Temporary Navigation File |
| .nb | Data | Mathematica Notebook |
| .nb7 | Backup | NovaBACKUP Output File |
| .nbf | Backup | Backup Now Archive (Most common) |
| .nbk | Backup | NovaBACKUP Backup Script |
| .nbu | Backup | Nokia Phone Backup File |
| .ncd | Image | Nero Cover Designer Document (Most common) |
| .ncf | Game | No Cache File |
| .nch | Misc | Outlook Express Folder File |
| .nco | Backup | Nero BackItUp File |
| .nd | Settings | QuickBooks Network Data File |
| .ndc | Settings | Personal Communications Settings File |
| .ndf | Data | SQL Server Secondary Database File |
| .ndk | Data | Lotus Notes Design Elements File |
| .nds | Game | Nintendo DS Game ROM |
| .ndx | Data | dBASE Index File |
| .nef | Image | Nikon Raw Image File |
| .neo | Image | NeoChrome Bitmap Image |
| .nes | Game | Nintendo (NES) ROM File |
| .net | Data | netViz Project File (Most common) |
| .net | Data | netViz Project File (Most common) |
| .neta | Data | Netica Binary File |
| .nff | Image | Neutral File Format |
| .nfo | Text | Warez Information File <font color="#00AA33">(Most common)</font> |
| .nfo | Text | Warez Information File (Most common) |
| .ngage | Game | N-Gage Game File |
| .nib | Developer | Interface Resources |
| .nick | Misc | Outlook 2000 Nickname File |
| .nif | Image | Gamebryo Image |
| .nitf | Data | National Imagery Transmission Format File |
| .njb | Misc | Nikon Photo Index File |
| .nk2 | Misc | Outlook 2002 Nickname File |
| .nki | Audio | KONTAKT Instrument File |
| .nltrack | Game | NoLimits Roller Coaster Track File |
| .nmind | Data | NovaMind Mind Map File |
| .nn | Disk | Nero CD File List |
| .notebook | Data | SMART Notebook File |
| .notes | Text | Memento Notes File |
| .now | Text | Readme File |
| .np | Data | Portfolio NetPublish File |
| .npl | Data | Nokia Playlist File |
| .npt | Data | Portfolio NetPublish Template |
| .nrg | Disk | Nero CD/DVD Image File |
| .nri | Disk | Nero ISO CD Compilation File |
| .nrs | Backup | NovaBACKUP Restore Script |
| .nrt | Audio | Nokia Ringtone |
| .ns2 | Data | Lotus Notes 2 Database |
| .ns3 | Data | Lotus Notes 3 Database |
| .ns4 | Data | Lotus Notes 4 Database |
| .nsa | Audio | Nullsoft Streaming Audio File |
| .nsbca | Game | Nintendo DS Model Animation File |
| .nsbmd | Game | Nintendo DS Model File |
| .nsbtx | Game | Nintendo DS Model Texture File |
| .nsf | Data | Lotus Notes Database (Most common) |
| .nss | Misc | Magnetic Screensaver File |
| .nst | Audio | NoiseTracker Module |
| .nsv | Video | Nullsoft Streaming Video File |
| .nt | System | Windows NT Startup File |
| .ntc | Image | Nikon Capture Custom Curves |
| .ntf | Image | MediaFace II CD Label |
| .nth | Misc | Nokia Series 40 Theme File |
| .ntn | Audio | NOTION Song File |
| .ntx | Data | Clipper Index File |
| .numbers | Data | Numbers Spreadsheet File |
| .nup | Game | Smart Security Update File |
| .nvc | Video | NeroVision Express Project File (Most common) |
| .nvl | Data | UniChem Results File |
| .nwc | Audio | NoteWorthy Composer File |
| .nwctxt | Text | NoteWorthy Composer Text File |
| .nwm | Misc | Sony NWM Display Screen File |
| .nwp | Misc | Magnetic Wallpaper File |
| .nwv | Settings | Dragon NaturallySpeaking User Archive |
| .nxc | Developer | NXC Source Code File |
| .nxg | Web | eSite Builder NXG Web Page |
| .ny | Plugin | Nyquist Plug-in |
| .nyf | Data | myBase Database File |
| .nzb | Text | NewzBin File |
