| zed | Compressed GEDCOM Document |
| zgl | Compressed XGL Document |
| zgt | Oren-made Scientific Document |
| zhp | Compressed Swiftview Document |
| zhtml | Secure IE Zipped HTML |
| zir | C.a.R. Figure |
| zjs | Zenographics ZjStream SuperPrint Zj Stream |
| zno | Zinio Reader Magazine |
| zpl | Zebra Programming Language Document |
| zplii | Zebra Programming Language Document |
| zrtf | Nisus Writer Pro Compressed RTF Document |
| zrz | jHIS Invoice Template |
| zsw | School Writing Document |
| ztf | DVD Label Template |
| ztx | C.a.R. Exported Image |
| zw | Chinese Text File |
| zwl | WinLabel v3 Document |
| zxml | Cubetto 5.0 Compressed XML Document |