| .nod |
NetObjects Fusion File |
| .nmea |
NMEA 0183 format GPS data file |
| .nn |
Nero CD File List |
| .nvdl |
NVDL Script |
| .nam |
Aqua3D Network File |
| .nsr |
Nessus Security Report File |
| .nfs11save |
Need for Speed: Hot Pursuit Save File |
| .nim |
Nim Source Code File |
| .nas |
Nastran Input File |
| .nlvm |
NoLimits Virtual Machine File |
| .nsl |
nsL Script |
| .nut |
NUT Video File |
| .new |
New G-Suite File |
| .nff |
Neutral File Format |
| .otf |
OpenType Font |
| .out |
Compiled Executable File |
| .ora |
Oracle Database Configuration File |
| .orig |
Original File |
| .opdownload |
Opera Partially Downloaded File |
| .off |
Object File Format |
| .odf |
OpenDocument Formula |
| .ota |
OTA Bitmap Image |
| .oem |
OEM Setup File |
| .odc |
Office Data Connection File |