List of All the File Extensions Formats and Types Starting With the Letter N
| File Extension | Description |
| NACL | Namecleaner |
| NAM | DMAP spreadsheet |
| NAPLPS | North American Presentation Layer Protocol Syntax |
| NAPT | Navicat Premium data transfer profile |
| NAT | Natata eBook |
| NAV2 | WinAVI temporary navigation |
| NAZ | Total Overdose game data |
| NEF | Nikon Digital SLR camera RAW image |
| NEN | Nick-O-Matic Design Factory project |
| NEO | Atari NeoChrome bitmap image |
| NETA | Netica Bayesian network binary |
| NETWORKCONNECT | Exported network preference panel settings |
| NEWSLOC | Apple Mac OS X Finder News internet location |
| NICK | Microsoft Outlook nickname |
| NIP | Microsoft DRM (Digital Right Management) |
| NITF | National Imagery Transmission Format |
| NUMBERS | iWork Numbers spreadsheet |