| uar | Uniface Deployment Archive |
| uas | PhotoImpact Backup Archive |
| uc2 | UltraCompressor 2 Compressed Archive |
| uea | Protector Suite QL Encrypted Archive |
| uexp | UE Viewer Package |
| ufa | UFA Compressed Archive |
| uha | UHarc Archive |
| uharc | UHarc Archive |
| upx | UPX Compressed File |
| ustar | Tape Archive |
| uws | UniTrader 2006 Website Archive |
| uwt | UniTrader Website Template Archive |
| uze | UltimateZip Compressed Archive |
| vad | Virtuoso Application Distribution Package |
| vbk | Veeam Full Backup Archive |
| vbm | Veeam Backup Metadata File |
| vcb | VMware Consolidated Backup Archive |
| vcn | Vacon NCDrive Package |
| vem | Micro Vault Virtual Expander File |
| vfs2 | NUVICO EasyNet Backup Data |
| vfs3 | NUVICO EasyNet Backup Data |
| vfs4 | NUVICO EasyNet Backup Data |
| vhb | Renee Becca Backup Archive |
| vib | Veeam Incremental Backup Archive |
| vib | VMware vSphere Installation Bundle Package |
| vmarc | z/VM Archive |
| vrb | Veeam Reversed Incremental Backup Archive |
| vsa | SWV Virtual Solution Archive |
| vsi | Visual Studio Content Installer File |
| vu3 | Ranch RenderFarm Project Archive |
| vub | RANCHecker Project Archive |
| waff | Internet Explorer for Mac Web Archive |
| wapt | WAPT Package |
| war | Java Web Archive |
| warc | Web ARChive File |