| .z | Unix Compressed Archive Format |
| .z0 | ZoneAlarm Mailsafe Renamed JS |
| .z01 | Split Multi-volume ZIP Compressed File Archive (part 2) |
| .z02 | Split Multi-volume ZIP Compressed File Archive (part 3) |
| .z03 | Split Multi-volume ZIP Compressed File Archive (part 4) |
| .z04 | Split Multi-volume ZIP Compressed File Archive (part 5) |
| .z05 | Split Multi-volume ZIP Compressed File Archive (part 6) |
| .z06 | Split Multi-volume ZIP Compressed File Archive (part 7) |
| .z07 | Split Multi-volume ZIP Compressed File Archive (part 8) |
| .z08 | Split Multi-volume ZIP Compressed File Archive (part 9) |
| .z09 | Split Multi-volume ZIP Compressed File Archive (part 10) |
| .z1 | ZoneAlarm Mailsafe Renamed VB Format |
| .z10 | Split Multi-volume ZIP Compressed File Archive (part 11) |
| .z11 | Split Multi-volume ZIP Compressed File Archive (part 12) |
| .z12 | Split Multi-volume ZIP Compressed File Archive (part 13) |
| .z13 | Split Multi-volume ZIP Compressed File Archive (part 14) |
| .z14 | Split Multi-volume ZIP Compressed File Archive (part 15) |
| .z15 | Split Multi-volume ZIP Compressed File Archive (part 16) |
| .z16 | Split Multi-volume ZIP Compressed File Archive (part 17) |
| .z17 | Split Multi-volume ZIP Compressed File Archive (part 18) |
| .z18 | Split Multi-volume ZIP Compressed File Archive (part 19) |
| .z19 | Split Multi-volume ZIP Compressed File Archive (part 20) |
| .z2 | ZoneAlarm Mailsafe Renamed |
| .z20 | Split Multi-volume ZIP Compressed File Archive (part 21) |
| .z2f | Zoo Tycoon 2 Game Format |
| .z3 | Infocom Game Module For Z-machine Version 3 |
| .z32 | ZAR32 Progress Data Save |
| .z3d | ZModeler 3D Graphics Format |
| .z4 | ZoneAlarm Mailsafe Renamed |
| .z5 | Infocom Game Module For Z-machine Version 5 |
| .z6 | ZoneAlarm Mailsafe Renamed |
| .z64 | Nintendo 64 Game ROM |
| .z7 | ZoneAlarm Mailsafe Renamed |
| .z8 | Infocom Game Module For Z-machine Version 8 |
| .z80 | ZX Spectrum Emulator Memory Snapshot |
| .z9 | ZoneAlarm Mailsafe Renamed |
| .z96 | PowerArchiver ZIP Multi-volume Archive |
| .za | Game |
| .zab | Zipped Audio Book |
| .zabw | G-Zipped AbiWord Document Format |
| .zac | Spirit Architectural Component |
| .zad | ZadGen Document |
| .zae | ZAwinEHE Project |
| .zak | Sight Survey Job |
| .zaloha | Miranda IM Backup |
| .zam | ZTreeWin Application Menu |
| .zanebug | Zanebug |
| .zap | Microsoft Windows Software Installation Settings Format |
| .zapc | ArcSoft Print Creations Creation |
| .zar | Sony PlayStation 2 Audio |
| .zargo | ArgoUML Model |
| .zasm | Zero Compiler Assembly Source |
| .zave | QuarkXpress IPad Document |
| .zax | Z-Axis 3-D Office Design Software Related |
| .zba | Compressed |
| .zbb | ZEMAX Black Box |
| .zbd | Canon Zoom Browser Database |
| .zbf | Z-Buffer Radiance Format |
| .zbi | Zeus Special Tags |
| .zblorb | Z-code Game |
| .zbm | Zlib Compressed Bitmap |
| .zbp | Boardmaker Board Package |
| .zbr | Zoner Zebra Metafile |
| .zc | Zipkey Configuration |
| .zca | ROSE Online |
| .zcache | Venture The Void Cache |
| .zce | ZCwinEHE Project |
| .zcfg | Zoom Search Engine Configuration |
| .zcls | Zero Compiler Class |
| .zcn | OmniPage Data |
| .zcp | Dimension Magics Printing |
| .zct | ZeitControl Terminal Program |
| .zd2 | Zillions Of Games Locked Rules |
| .zdb | Quicken Data Format |
| .zdc | CD Catalog Expert Database Format |
| .zdct | Adobe After Effects Localization Format |
| .zdl | DesignPro Label Design Format |
| .zdp | DesignPro Label Design Format |
| .zds | DVDSubber DVD Subtitles And DVD Scripts Format |
| .zdtc | Adobe After Effects Language Settings |
| .zdx | Avery Design Clipart Index |
| .zed | BitTorrent Metainfo |
| .zeg | ZeroG Subtitles Format |
| .zei | ANNO 1602 Game |
| .zem | Zope External Editor |
| .zen | ZEMAX Face Number |
| .zeon | E-on Installation Archives |
| .zero | Zero Compiler Project |
| .zex | ZOOM MRS-802 System |
| .zexp | Zope Binary Export Data |
| .zfc | Back4Win Backup Archive |
| .zfo | XSL-FO Online Form |
| .zfrm | Zero Form Designer |
| .zfs | Z+F Scan |
| .zfsendtotarget | Windows XP ZIP Compressed Folder |
| .zfx | ZipForm Transaction Format |
| .zgeproj | ZGame Editor Project |
| .zgi | Zoomerang Web Survey Page |
| .zgl | XGL Compressed Document |
| .zgm | ZenoGraphics Graphics Image Format |
| .zgp | Zelda Classic Graphics Pack |
| .zgr | BeatCreator Loop |
| .zgt | Oren Scientific Word Processor |
| .zgy | Petrel Compressed Seismic Data |
| .zh | Netscape Communicator Java Classes |
| .zhp | SwiftView ICS Command |
| .zhtml | Secure IE Zipped HTML Format |
| .zh_tw | Netscape Communicator Java Classes |
| .zi | Renamed ZIP Format |
| .zib | ZX-Editor Graphic Library |
| .zid | Zoo/PhytoImage Data |
| .zif | Zooming Interface Format |
| .zim | Wiki Archive Format |
| .zip | WinZIP Compressed ZIP Archive Format |
| .zip2 | StuffIt Archive |
| .zipenx | Egis Encrypted ZIP |
| .zipfs | 18 Wheels Of Steel: Across America Game |
| .zipo | Need For Madness Game Data |
| .zipx | Extended Zip Format |
| .zir | Compass And Ruler Figure |
| .zix | WinZix Compressed Archive Format |
| .zka | Quicken Win Version 6 |
| .zkx | ZixCorp Signature |
| .zl | Zlib Compressed Format |
| .zl0 | ZoneAlarm Mailsafe Renamed ADE |
| .zl1 | ZoneAlarm Mailsafe Renamed ADP |
| .zl2 | ZoneAlarm Mailsafe Renamed BAS |
| .zl3 | ZoneAlarm Mailsafe Renamed BAT |
| .zl4 | ZoneAlarm Mailsafe Renamed CHM |
| .zl5 | ZoneAlarm Mailsafe Renamed CMD |
| .zl6 | ZoneAlarm Mailsafe Renamed COM |
| .zl7 | ZoneAlarm Mailsafe Renamed CPL |
| .zl8 | ZoneAlarm Mailsafe Renamed CRT |
| .zl9 | ZoneAlarm Mailsafe Renamed EXE Format |
| .zla | ZoneAlarm Mailsafe Renamed HLP |
| .zlb | ZoneAlarm Mailsafe Renamed HTA Format |
| .zlc | ZoneAlarm Mailsafe Renamed INF |
| .zld | ZoneAlarm Mailsafe Renamed INS |
| .zle | ZoneAlarm Mailsafe Renamed ISP |
| .zlf | ZoneAlarm Mailsafe Renamed JSE |
| .zlg | ZoneAlarm Mailsafe Renamed LNK |
| .zlh | ZoneAlarm Mailsafe Renamed MDB |
| .zli | ZoneAlarm Mailsafe Renamed MDE |
| .zlib | Zlib Archive |
| .zlj | ZoneAlarm Mailsafe Renamed MSC |
| .zlk | ZoneAlarm Mailsafe Renamed MSI |
| .zll | ZoneAlarm Mailsafe Renamed MSP |
| .zlm | ZoneAlarm Mailsafe Renamed MST |
| .zln | ZoneAlarm Mailsafe Renamed PCD |
| .zlo | ZoneAlarm Mailsafe Renamed PIF |
| .zlp | ZoneAlarm Mailsafe Renamed REG |
| .zlq | ZoneAlarm Mailsafe Renamed SCR |
| .zlr | ZoneAlarm Mailsafe Renamed SCT |
| .zls | ZoneAlarm Mailsafe Renamed SHS |
| .zlt | ZoneAlarm Mailsafe Renamed URL |
| .zlu | ZoneAlarm Mailsafe Renamed VBE |
| .zlv | ZoneAlarm Mailsafe Renamed VBS |
| .zlw | ZoneAlarm Mailsafe Renamed WSC |
| .zlx | ZoneAlarm Mailsafe Renamed WSF |
| .zly | ZoneAlarm Mailsafe Renamed WSH |
| .zlz | ZoneAlarm Mailsafe Renamed ASX |
| .zm0 | ZoneAlarm Mailsafe Renamed DBX Ile |
| .zm1 | ZoneAlarm Mailsafe Renamed MDA Format |
| .zm2 | ZoneAlarm Mailsafe Renamed MDZ Format |
| .zm3 | ZoneAlarm Mailsafe Renamed NCH Format |
| .zm4 | ZSNES Movie #4 |
| .zm5 | ZSNES Movie #5 |
| .zm6 | ZSNES Movie #6 |
| .zm7 | ZSNES Movie #7 |
| .zm8 | ZSNES Movie #8 |
| .zm9 | ZoneAlarm Mailsafe Renamed ZIP Format |
| .zm? | ZSNES Movie |
| .zma | ZoneAlarm Mailsafe Renamed RAR |
| .zmap | Zombies Ate My Neighbours Map Format |
| .zmb | ZoneAlarm Mailsafe Renamed DLL |
| .zmc | ZoneAlarm Mailsafe Renamed EML Format |
| .zmd | ZoneAlarm Mailsafe Renamed OCX |
| .zme | ZoneAlarm Mailsafe Renamed SYS |
| .zmf | Zoner Metafile |
| .zmg | ZoneAlarm Mailsafe Renamed |
| .zmi | ZoneAlarm Mailsafe Renamed |
| .zmk | ZoneAlarm Mailsafe Renamed |
| .zml | Zoomcreator Zooming Scene Description Format |
| .zmm | ZoneAlarm Mailsafe Renamed |
| .zmn | ZoneAlarm Mailsafe Renamed |
| .zmo | ROSE Online Model Animation |
| .zmon | ZoundMonitor |
| .zmp | ZoneAlarm Mailsafe Renamed |
| .zmq | ZoneAlarm Mailsafe Renamed |
| .zmr | ZoneAlarm Mailsafe Renamed |
| .zms | ZoneAlarm Mailsafe Renamed |
| .zmt | ZoneAlarm Mailsafe Renamed |
| .zmu | ZoneAlarm Mailsafe Renamed |
| .zmv | ZoneAlarm Mailsafe Renamed Format |
| .zmw | ZoneAlarm Mailsafe Renamed |
| .zmx | ZoneAlarm Mailsafe Renamed |
| .zmy | ZoneAlarm Mailsafe Renamed |
| .zmz | ZoneAlarm Mailsafe Renamed |
| .zn | ZNwinEHE Project |
| .zn0 | ZoneAlarm Mailsafe Renamed |
| .zn1 | ZoneAlarm Mailsafe Renamed |
| .zn2 | ZoneAlarm Mailsafe Renamed |
| .zn3 | ZoneAlarm Mailsafe Renamed |
| .zn4 | ZoneAlarm Mailsafe Renamed |
| .zn5 | ZoneAlarm Mailsafe Renamed |
| .zn6 | ZoneAlarm Mailsafe Renamed |
| .zn7 | ZoneAlarm Mailsafe Renamed |
| .zn9 | ZoneAlarm Mailsafe Renamed |
| .zna | ZoneAlarm Mailsafe Renamed |
| .znb | ZoneAlarm Mailsafe Renamed |
| .znc | ZoneAlarm Mailsafe Renamed |
| .zncn | RMCProfile List |
| .znd | ZoneAlarm Mailsafe Renamed |
| .zne | ZoneAlarm Mailsafe Renamed |
| .znf | ZoneAlarm Mailsafe Renamed |
| .zng | ZoneAlarm Mailsafe Renamed |
| .znh | ZoneAlarm Mailsafe Renamed |
| .zni | ZoneAlarm Mailsafe Renamed |
| .znj | ZoneAlarm Mailsafe Renamed |
| .znk | ZoneAlarm Mailsafe Renamed |
| .znl | ZoneAlarm Mailsafe Renamed |
| .znm | ZoneAlarm Mailsafe Renamed |
| .znn | ZoneAlarm Mailsafe Renamed |
| .zno | ZoneAlarm Mailsafe Renamed Format |
| .znp | ZoneAlarm Mailsafe Renamed |
| .znq | ZoneAlarm Mailsafe Renamed |
| .znr | ZoneAlarm Mailsafe Renamed |
| .zns | ZoneAlarm Mailsafe Renamed |
| .znt | ZoneAlarm Mailsafe Renamed |
| .znu | ZoneAlarm Mailsafe Renamed |
| .znv | ZoneAlarm Mailsafe Renamed |
| .znw | ZoneAlarm Mailsafe Renamed |
| .znx | ZoneAlarm Mailsafe Renamed |
| .zny | ZoneAlarm Mailsafe Renamed |
| .znz | ZoneAlarm Mailsafe Renamed |
| .zn~ | Zinio Reader Temporary |
| .zo0 | ZoneAlarm Mailsafe Renamed |
| .zo1 | ZoneAlarm Mailsafe Renamed |
| .zo2 | ZoneAlarm Mailsafe Renamed |
| .zo3 | ZoneAlarm Mailsafe Renamed |
| .zo4 | ZoneAlarm Mailsafe Renamed |
| .zo5 | ZoneAlarm Mailsafe Renamed |
| .zo6 | ZoneAlarm Mailsafe Renamed |
| .zo7 | ZoneAlarm Mailsafe Renamed |
| .zo8 | ZoneAlarm Mailsafe Renamed |
| .zo9 | ZoneAlarm Mailsafe Renamed |
| .zoa | ZoneAlarm Mailsafe Renamed |
| .zob | ZoneAlarm Mailsafe Renamed |
| .zoc | ZoneAlarm Mailsafe Renamed |
| .zod | ZoneAlarm Mailsafe Renamed |
| .zodb | Zope Object Database |
| .zoe | ZoneAlarm Mailsafe Renamed |
| .zof | ZoneAlarm Mailsafe Renamed |
| .zog | ZoneAlarm Mailsafe Renamed |
| .zoh | ZoneAlarm Mailsafe Renamed |
| .zoi | ZoneAlarm Mailsafe Renamed |
| .zoj | ZoneAlarm Mailsafe Renamed |
| .zok | ZoneAlarm Mailsafe Renamed |
| .zol | ZoneAlarm Mailsafe Renamed |
| .zom | Zoom Compressed Amiga File Archive |
| .zon | Collection Building Custom Zone Format |
| .zone.identifier | Windows Zone Identifier Format |
| .zoner-index-cache | Zoner Photo Studio Index Cache |
| .zoner-rawdata-cache | Zoner Photo Studio Raw Data Cache |
| .zoo | ZOO Compressed Format |
| .zop | ZoneAlarm Mailsafe Renamed |
| .zoq | ZoneAlarm Mailsafe Renamed |
| .zor | ZoneAlarm Mailsafe Renamed |
| .zos | ZoneAlarm Mailsafe Renamed |
| .zot | ZoneAlarm Mailsafe Renamed |
| .zou | ZoneAlarm Mailsafe Renamed |
| .zov | ZoneAlarm Mailsafe Renamed |
| .zow | ZoneAlarm Mailsafe Renamed |
| .zox | ZoneAlarm Mailsafe Renamed |
| .zoy | ZoneAlarm Mailsafe Renamed |
| .zoz | ZoneAlarm Mailsafe Renamed |
| .zp0 | ZoneAlarm Mailsafe Renamed |
| .zp1 | ACOS PLUS.1 Project Management Data And Workaround |
| .zp4 | ZoneAlarm Mailsafe Renamed |
| .zp5 | ZoneAlarm Mailsafe Renamed |
| .zp7 | ZoneAlarm Mailsafe Renamed |
| .zpa | Vielklang Audio Metadata Format |
| .zpak | Sony Ericsson Xperia Play Game Pack |
| .zpaq | ZPAQ Compressed Archive |
| .zpb | ZoneAlarm Mailsafe |
| .zpd | ABC Zeroadic Predicates |
| .zpf | ZoneAlarm Mailsafe Renamed Format |
| .zpi | Nuance PDF Converter Index Format |
| .zpj | ZoneAlarm Mailsafe Renamed |
| .zpk | Zend Studio Deployment Application Package |
| .zpl | Zune Playlist Format |
| .zpm | ZoneAlarm Mailsafe Renamed |
| .zpo | ZoneAlarm Mailsafe Renamed |
| .zpp | ZoneAlarm Mailsafe Renamed |
| .zpq | ZoneAlarm Mailsafe Renamed |
| .zpr | ZoneAlarm Mailsafe Renamed |
| .zprf | ZipIt Preference |
| .zps | Zebra Portable Safe Format |
| .zpt | Zoner Photo Studio Template |
| .zpu | ZoneAlarm Mailsafe Renamed |
| .zq0 | ZoneAlarm Mailsafe Renamed |
| .zq3 | ZoneAlarm Mailsafe Renamed |
| .zqc | ZoneAlarm Mailsafe Renamed |
| .zqd | ZoneAlarm Mailsafe Renamed |
| .zqv | ZoneAlarm Mailsafe Renamed |
| .zqy | ZoneAlarm Mailsafe Renamed |
| .zqz | ZoneAlarm Mailsafe Renamed |
| .zr2 | ZoneAlarm Mailsafe Renamed |
| .zr3 | ZoneAlarm Mailsafe Renamed |
| .zrb | Smacker Compressed Video |
| .zrd | ZEMAX Ray Database |
| .zrf | Zillions Rules |
| .zri | BBC/RISC OS ROM Image |
| .zrn | ACOS Plus 1 Project |
| .zrp | VMware Unix Agent Debug |
| .zrs | Hearts Game |
| .zrtf | Nisus Writer Pro Compressed RTF |
| .zs0 | ZSNES Slot 0 Saved State Format |
| .zs1 | ZSNES Slot 1 Saved State Format |
| .zs2 | ZSNES Slot 2 Saved State Format |
| .zs3 | ZSNES Slot 3 Saved State Format |
| .zs4 | ZSNES Slot 4 Save State Format |
| .zs5 | ZSNES Slot 5 Saved State Format |
| .zs6 | ZSNES Slot 6 Saved State Format |
| .zs7 | ZSNES Slot 7 Saved State Format |
| .zs8 | ZSNES Slot 8 Saved State Format |
| .zs9 | ZSNES Slot 9 Saved State Format |
| .zsc | Zend Studio Server Settings |
| .zsd | Dave Mirra Freestyle BMX Data |
| .zse | Zelda Sound Effects |
| .zsf | Zend Server Event |
| .zsg | Zillions Of Games Game |
| .zsh | Unix Shell Script |
| .zsk | Zoner Media Explorer Skin |
| .zsn | ACOS Plus 1 Project |
| .zsol | M & S Steel Corp. Model |
| .zsp | WinView /400 Compressed Report |
| .zsql | ZIP Compressed SQL |
| .zsr | Form-Z Temporary Save |
| .zsrc | Zero Source |
| .zst | ZSNES Save Format |
| .zt | Mental Ray Image Depth Format |
| .ztd | Zoo Tycoon Game Format |
| .zte | E-Tabs Reader |
| .ztf | DVD Label Template Format |
| .ztg | ZEMAX Table Glass |
| .ztk | Zope Toolkit |
| .ztl | ZBrush ZTool Native |
| .ztm | ZTreeWin Macro |
| .ztmp | Steam Compressed Game Resource Format |
| .ztr | DVD Label Template Media Format |
| .ztt | Z-Tree |
| .zul | ZK User Interface Format |
| .zup | Microsoft Business Solutions Navision Configuration |
| .zvd | Zyxel Voicefile (Z-Fax) |
| .zvi | Carl Zeiss AxioVision Saved Microscope Image |
| .zvpl | Visual Paradigm For UML License Key Format |
| .zvr | Safe Media Recorded Voice Audio |
| .zvt | Photoshop Zoomify Preset Format |
| .zvz | Malware Format |
| .zw | Chinese Text Format |
| .zw1 | EPLAN Project Backup |
| .zw2 | EPLAN Symbols Backup |
| .zw3 | EPLAN Standard Sheet Backup |
| .zw4 | EPLAN Forms Backup |
| .zw5 | EPLAN Macro Backup |
| .zw6 | EPLAN Parts Backup |
| .zw7 | EPLAN Dictionaries Backup |
| .zw8 | EPLAN Configuration Data Backup |
| .zws | ZiLOG Developer Studio Workspace |
| .zwt | ControlWave Designer Zipped Project |
| .zx | KGB ZX Spectrum Emulator Snapshot |
| .zx01 | Extended ZIP Split Archive |
| .zx02 | Extended ZIP Split Archive |
| .zxb | ZX-Modules Metafile |
| .zxe | ZX-Editor Second Edition Format |
| .zxn | PhotoEncrypt Encrypted Photo |
| .zxp | Adobe Extension Package Format |
| .zxt | ZX Spectrum Emulator |
| .zyp | Propellerhead Reason Subtractor Synth Instrument Patch |
| .zys | Pervasive Business Integrator Database |
| .zz | ZZip Compressed Archive |
| .zzb | FutureSoft MultiView Configurable Toolbar |
| .zzc | FutureSoft MultiView Connection Details |
| .zzd | FutureSoft MultiView Wizard Defaults |
| .zze | FutureSoft MultiView Emulation Details |
| .zzf | FutureSoft MultiView File Transfer Configuration |
| .zzk | FutureSoft MultiView Keyboard Mapping |
| .zzp | FutureSoft MultiView Configurable Pop-up Menu |
| .zzr | ZoneAlarm Mailsafe Renamed |
| .zzs | FutureSoft MultiView Script |
| .zzt | FutureSoft MultiView Terminal Configuration |
| .zzu | FutureSoft MultiView Uninstall |
| .zzz | Micro Perfect Products Sleep Mode Format |
