| Extension | File Type | Files scanned | Contributor |
| Z | Compress compressed data | 4 | |
| Z | InstallShield Z archive | 6 | Surfer |
| Z | Pack compressed data | 2 | |
| Z | Pack compressed data (old) | 2 | |
| Z | Quasijarus Strong Compression compressed data | 2 | |
| Z | SCO compress LZH compressed data | 2 | |
| Z | UNIX Compressed data | 4 | |
| Z2S | Zoo Tycoon 2 Saved game | 16 | |
| Z3 | Z-Code V3 adventure for Infocom Z-Machine | 2 | |
| Z3 | ZW3D model | 40 | |
| Z3D | ZModeler 3D Model | 31 | |
| Z4 | Z-Code V4 adventure for Infocom Z-Machine | 3 | |
| Z5 | Z-Code V5 adventure for Infocom Z-Machine | 68 | |
| Z64 | Mr. Backup Z64 ROM dump | 5 | |
| Z8 | Z-Code V8 adventure for Infocom Z-Machine | 11 | |
| Z81 | EightyOne snapshot | 2 | |
| Z88 | OZvm snapshot | 5 | |
| ZAB | Zipped Audio Book | 6 | |
| ZAE | Compressed COLLADA Digital Asset Exchange | 35 | |
| ZAL | Z-Axis game data archive | 4 | |
| ZAM | ZBrush Array Mesh | 18 | |
| ZAN | BlueEyes Animation | 8 | |
| ZAP | Frontier Dev ZAP game data archive | 2 | |
| ZAP | ZAP Patch | 21 | |
| ZAP | ZAP Program description | 24 | |
| ZAP | ZAP compressed disk image | 4 | |
| ZAP | ZoneLabs Zone Alarm data | 18 | |
| ZAR | Fallout Tactics image | 11 | |
| ZARGO | ArgoUML Zipped package | 4 | |
| ZBD | Z Corp. ZPrint 3D format | 6 | |
| ZBN/GZ | LaserGRBL ZippedButtons | 4 | |
| ZBP | ZBrush Preset | 349 | |
| ZBR | ZBrush Document | 10 | |
| ZBR | Zebra metafile | 10 | |
| ZCFG | HLGuard Z config file | 3 | |
| ZCI | PowerCD Multimedia format | 9 | |
| ZCK | zchunk (v1) | 2 | |
| ZCML | Zope Configuration Mark-up Language | 6 | |
| ZCO | Zero-X Color scheme | 10 | |
| ZCODE | Zortrax Z-Code | 4 | |
| ZDA | ZDA game data archive | 21 | |
| ZDB | ZenPhoto Database Backup | 12 | |
| ZDP | Avery DesignPro Label design | 89 | |
| ZDS | ZDoom savegame | 8 | |
| ZDSPROJ | Zilog Developer Studio II Project | 134 | |
| ZDX | Avery Design clipart index | 3 | |
| ZED | ZX-Edit document | 4 | |
| ZED | ZX-Edit document block | 3 | |
| ZED | Zed! encrypted container | 12 | |
| ZEG | ZeroG subtitles | 4 | |
| ZEL | Zelio Soft project | 8 | |
| ZENO | Zeno format | 3 | |
| ZET | ZET compressed archive | 20 | Label |
| ZEXP | Zope binary export file | 16 | |
| ZF3D | Flare3D model | 20 | |
| ZFI | ZenGL Font | 2 | |
| ZFP | ZBrush Fiber Preset | 43 | |
| ZFS | Zork FileSystem game data archive (v1) | 6 | |
| ZFX | ZipForm data | 20 | |
| ZGEPROJ | ZGameEditor project | 9 | |
| ZGR | ZBrush Grid | 5 | |
| ZGT | Oren-made scientific document | 3 | |
| ZIE | ProtectIt/2 Encrypted | 6 | |
| ZIF | ZIF bitmap | 2 | |
| ZIF | ZoomifyImageFormat bitmap | 3 | |
| ZIM | ZIM format | 10 | |
| ZING | Zing! directory info | 11 | |
| ZINGTREE | Zing! directory tree | 2 | |
| ZIP | AM-Notebook backup | 4 | |
| ZIP | Adventure Game Toolkit game package | 23 | |
| ZIP | Amiga WHDLoad package (zipped) | 145 | |
| ZIP | Apple Mac OS X Dashboard Widget | 11 | |
| ZIP | Aston Shell theme | 11 | |
| ZIP | BagIt package (ZIP) | 39 | |
| ZIP | BeamNG mod package | 4 | |
| ZIP | BeamNG scenario | 12 | |
| ZIP | BepInEx plug-in/mod | 4 | |
| ZIP | Caddie Catalog Package | 9 | |
| ZIP | Cinnamon applet | 27 | |
| ZIP | Cinnamon desklet | 34 | |
| ZIP | Cinnamon extension | 18 | |
| ZIP | Cinnamon theme | 29 | |
| ZIP | D-Fend Reloaded package | 7 | |
| ZIP | DAISY book | 11 | |
| ZIP | DDP Image (ZIP) | 3 | |
| ZIP | Everyone Piano skin | 9 | |
| ZIP | FDI package | 10 | |
| ZIP | GS-Base database | 6 | |
| ZIP | HstWB Installer package | 19 | |
| ZIP | JASPP package | 23 | |
| ZIP | KVIrc addon (old Zip format) | 31 | |
| ZIP | Magisk Module | 15 | |
| ZIP | OctoPrint sysinfo bundle | 4 | |
| ZIP | Oolite eXpansion Pack | 4 | |
| ZIP | Open Packaging Conventions container | 9 | |
| ZIP | Opera Widget | 11 | |
| ZIP | Pencil stencil | 6 | |
| ZIP | Pencil template | 7 | |
| ZIP | Pivot Style Template | 10 | |
| ZIP | Radeon Software Settings Snapshot | 4 | |
| ZIP | Rockbox Theme package | 9 | |
| ZIP | Simple Machines Forums theme | 38 | |
| ZIP | SubEthaEdit Mode | 45 | |
| ZIP | Thunderstore Mod package | 16 | |
| ZIP | TorrentZip compressed archive | 6 | |
| ZIP | Total Commander language pack | 9 | |
| ZIP | Trillian zipped Skin | 19 | |
| ZIP | Virtual Skipper skin | 17 | |
| ZIP | Wokwi downloaded project | 17 | |
| ZIP | ZIP compressed archive | 23 | |
| ZIP | ZIP compressed archive (empty) | 10 | |
| ZIP | ZIP compressed archive (multivolume) | 36 | |
| ZIP | ZLock Pro encrypted ZIP | 5 | |
| ZIP | Zipped Video Game Music pack | 21 | |
| ZIP | eMule skin profile packages (ZIP) | 9 | |
| ZIP | lvllvl project | 9 | |
| ZIP | macOS application in a Zip container | 6 | |
| ZIPE | Minecraft game data | 5 | |
| ZIR | Compass and Ruler geometry | 327 | |
| ZIX | WinZix compressed archive | 2 | |
| ZJS | Zenographics ZjStream Page Description Language (big-endian) | 2 | |
| ZJS | Zenographics ZjStream Page Description Language (little-endian) | 2 | |
| ZK | ZK format | 3 | |
| ZL | Easy CD Creator Drag to Disk File | 4 | |
| ZL | Zen Guard license | 5 | |
| ZLIC | ZBrush License | 5 | |
| ZLS | ZX-Live Snapshot | 2 | |
| ZLX | Atlantis Word Processor Lexicon | 3 | |
| ZM2 | Zelio Soft 2 program | 6 | |
| ZMA | ZMA impedance response data | 5 | |
| ZMF | Zoner Draw | 3 | |
| ZMF | Zoner Draw (container with preview) | 3 | |
| ZMG | Novell ZENworks Desktop Management image | 3 | |
| ZMI | ZAP Meta Image | 11 | |
| ZMT | ZBrush Material | 94 | |
| ZMV | ZSNES movie capture | 2 | |
| ZMX | ZEMAX lens data | 36 | |
| ZNC/DAT/Z_T | Zinc Data (generic) | 37 | |
| ZNC/DAT/Z_T | Zinc Data (v3.x) | 2 | |
| ZNC/DAT/Z_T | Zinc Data (v4.x) | 2 | |
| ZNM | ZBrush Noise Maker | 13 | |
| ZNO | Zinio Reader Magazine | 6 | |
| ZOM | Zoom compressed disk image (old) | 2 | |
| ZOM | Zoom compressed disk image (v5.x) | 2 | |
| ZOO | Microsoft Zoo Tycoon saved game | 10 | Dinoguy1000 |
| ZOO | ZOO compressed archive | 8 | |
| ZOO | ZOO compressed archive (strict) | 17 | |
| ZOOK | BAMZOOKi creature data | 25 | |
| ZOT | Zoot information processor database | 4 | |
| ZPAQ | zpaq compressed archive | 5 | |
| ZPAQ | zpaq compressed archive (old) | 7 | |
| ZPJ | Zephyr Eclipse server Project | 4 | |
| ZPK | PDS Zip | 2 | |
| ZPK | ZPack compressed archive | 6 | |
| ZPK | ZPack compressed archive (v1) | 3 | |
| ZPK | ZPackage compressed archive (v1) | 2 | |
| ZPL | Zebra Printer Language | 4 | |
| ZPL | Zebra Printer Language (~JO) | 7 | |
| ZPL | Zune PlayList | 7 | |
| ZPNG | Zpng bitmap | 2 | |
| ZPP | ZPanel Package | 16 | |
| ZPR | ZBrush Project | 47 | |
| ZRF | Zillions of Games Rules File | 46 | |
| ZRF | Zillions of Games Rules File (with CR+LF) | 9 | |
| ZRF | Zillions of Games Rules File (with rem) | 62 | |
| ZSAV | SPSS compressed data | 3 | |
| ZSC | ZBrush Script | 6 | |
| ZSF | Z64K Snapshot File | 3 | |
| ZSG | Zillions of Games Solution - Saved Game | 29 | |
| ZSM/ZSS | Z-Axis game sound data archive | 5 | |
| ZSM | ZSM Music (v1) | 168 | |
| ZST | ZSNES Save State | 5 | |
| ZST | Zstandard compressed data | 56 | Romiras |
| ZSYNC | zsync meta data | 34 | |
| ZT | ztracker module | 2 | |
| ZTGT | Zilog Developer Studio II Target | 73 | |
| ZTH | DivX Connected Theme | 14 | |
| ZTL | ZBrush ZTool native format | 156 | |
| ZTQ | z-Tree Questionnaire | 4 | |
| ZTT | z-Tree Treatment | 22 | |
| ZUML | Poseidon for UML project file | 10 | |
| ZVD/ZYX | ZyXEL Voice Format audio | 12 | |
| ZVPL | Visual Paradigm License Key | 5 | |
| ZVR | Recorded voice audio | 4 | |
| ZVR | ZVR eBook | 2 | |
| ZVT | BlueZone VT Display Emulator configuration | 3 | |
| ZW | Zooper Widget template | 32 | |
| ZWP | Dark Reign 2 game data archive | 2 | |
| ZWS | ZiLOG Developer Studio Workspace file | 3 | |
| ZX | ZEsarUX snapshot | 33 | |
| ZX1 | ZX1 bitstream/core | 17 | |
| ZX82 | Speculator '97 snapshot | 11 | |
| ZXB | ZX-Modules Meta format | 2 | |
| ZXC | ZX ROM Cartridge Creator Compilation | 7 | |
| ZXE | ZX-Editor Second Edition document | 2 | |
| ZXP | Adobe Zipped Extension Package | 3 | |
| ZXP | ZX-Paintbrush document bitmap | 2 | |
| ZXP | ZX-Paintbrush extended document bitmap | 2 | |
| ZXS | zx32's ZXS snapshot format | 17 | |
| ZZ | Zzip compressed archive | 8 | |
| ZZS | Zyzzyva Search | 478 | |
| ZZT | ZZT Game Creation System data format | 45 | |
