| .dlx |
DIALux Document |
| .disc |
Toast Document |
| .dra |
Nuance Dragon Voice Recording File |
| .daz |
DAZ Studio 3D Scene |
| .dsf |
Delusion Digital Sound File |
| .dsb |
Dell DataSafe Backup File |
| .dwd |
DavkaWriter File |
| .dash |
MPEG-DASH Video File |
| .duf |
DAZ User File |
| .db.crypt8 |
WhatsApp Encrypted Database File |
| .db.crypt12 |
WhatsApp Encrypted Database File |
| .dsk |
Disk Image |
| .dv |
Digital Video File |
| .dic |
Dictionary File |
| .dfont |
Mac OS X Data Fork Font |
| .dxb |
Duxbury Braille File |
| .dir |
Adobe Director Movie |
| .dxr |
Protected Macromedia Director Movie |
| .dcs |
Desktop Color Separation File |
| .dlg |
Dialogue File |
| .dms |
Disk Masher Image |
| .dvi |
Device Independent Format File |
| .do |
Java Servlet |
| .djvu |
DjVu Image |