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System Files
The System Files category includes files related to Mac, Windows, and Linux operating systems. Some examples include system libraries, icons, themes, and device drivers. Files output by the system are also included in this category.
Common system file extensions include .DLL, .DRV, .SYS, and .CAB.
| File Extension | File Type | Popularity |
|---|---|---|
| .REG | Registry File | 158 |
| .WDGT | Dashboard Widget | 162 |
| .AML | ACPI Machine Language File | 162 |
| .ADMX | Group Policy Administrative Template File | 162 |
| .CUR | Windows Cursor | 169 |
| .SEARCHCONNECTOR-MS | Windows Search Connector File | 169 |
| .REGTRANS-MS | Registry Transaction Log File | 172 |
| .CLB | COM+ Catalog File | 173 |
| .ICONPACKAGE | IconPackager Theme File | 173 |
| .FTF | FlashTool Firmware File | 173 |
| .ANI | Windows Animated Cursor | 173 |
| .DLL | Dynamic Link Library | 174 |
| .DESKTHEMEPACK | Windows 8 Desktop Theme Pack File | 175 |
| .ITEMDATA-MS | Windows 8 Start Screen Item Data File | 175 |
| .ICNS | macOS Icon Resource File | 175 |
| .THEME | Microsoft Plus! Desktop Theme | 176 |
| .EBD | Windows EBD System File | 177 |
| .HTT | Hypertext Template File | 178 |
| .73U | TI-73 Explorer Operating System File | 178 |
| .DESKLINK | Desktop Shortcut | 178 |
| .LNK | Windows Shortcut | 178 |
| .VX_ | Compressed Virtual Device Driver File | 180 |
| .HVE | Windows Registry Hive File | 180 |
| .VGA | VGA Display Driver | 180 |
| .DMP | Windows Memory Dump | 181 |
| .NFO | System Information File | 182 |
| .DVD | DOS Device Driver | 182 |
| .PK2 | Silkroad Online Game Data File | 182 |
| .MDMP | Windows Minidump | 183 |
| .PCK | System Center Configuration Manager Package File | 183 |
| .RMT | Router Firmware File | 183 |
| .QVM | Q Virtual Machine | 184 |
| .SCR | Windows Screensaver | 185 |
| .ICO | Icon File | 186 |
| .NT | Windows NT Startup File | 186 |
| .INF_LOC | Windows Driver Information Cache File | 187 |
| .SYS | Windows System File | 188 |
| .CPL | Windows Control Panel Item | 189 |
| .LIBRARY-MS | Windows Library Description File | 189 |
| .HIV | Windows Registry Hive File | 190 |
| .ASEC | Android Secure Application File | 191 |
| .MANIFEST | Windows Application Manifest File | 191 |
| .SFCACHE | ReadyBoost Cache File | 192 |
| .RC1 | Samsung Mobile Device Firmware File | 192 |
| .PAT | DiskStation Manager Installation File | 193 |
| .BASH_HISTORY | Bash History File | 196 |
| .ION | File Description File | 196 |
| .CAB | Windows Cabinet File | 197 |
| .MSC | Microsoft Management Console Snap-in Control File | 197 |
| .PROP | Android Build Properties File | 197 |
| .BIN | Router Firmware File | 198 |
| .000 | Indexing Service Data File | 199 |
| .PREFPANE | Mac OS X System Preference Pane | 200 |
| .NLT | Windows Transliteration File | 200 |
| .CGZ | Linux Drivers Archive | 200 |
| .FFX | Microsoft Find Fast Index | 200 |
| .SERVICE | Systemd Service Unit File | 200 |
| .H1S | Windows Assistance Platform Help File | 200 |
| .TIMER | Systemd Unit Configuration File | 200 |
| .MENU | macOS Menu Extra | 200 |
| .LOG1 | Windows Registry Hive Log File | 200 |
| .CI | Windows Content Indexer Catalog File | 200 |
| .DRPM | Delta RPM File | 200 |
| .EDJ | Enlightenment Theme File | 200 |
| .FOTA | Firmware Over-the-Air File | 200 |
| .ZONE.IDENTIFIER | Windows Zone Identifier File | 200 |
| .MAPIMAIL | Send To Mail Recipient | 200 |
| .LOCKFILE | Mac OS X PLIST Lock File | 200 |
| .PWL | Windows Password List | 200 |
| .MUI | Multilingual User Interface File | 200 |
| .ETL | Microsoft Event Trace Log File | 201 |
| .DAT | Windows Registry Hive File | 202 |
| .ADM | Administrative Template File | 205 |
| .ELF | Executable and Linkable Format File | 207 |
| .SDB | Custom Application Compatibility Database | 208 |
| .MTZ | MIUI Theme | 208 |
| .FX | ReadyBoot Trace File | 208 |
| .FIRM | Boot9Strap 3DS Firmware File | 209 |
| .WDF | Windows Driver Foundation File | 209 |
| .MLC | Microsoft Language Interface Pack | 211 |
| .CM0013 | Samsung Smart TV Index File | 212 |
| .BASH_PROFILE | Bash Interactive Login Shell File | 212 |
| .LFS | Samsung Phone params.lfs File | 212 |
| .MSSTYLES | Windows XP Style | 213 |
| .PNF | Precompiled INF File | 216 |
| .MOBILECONFIG | Apple Mobile Configuration File | 216 |
| .PIT | Samsung Phone Firmware File | 217 |
| .SYS | Motorola Driver File | 217 |
| .MBR | Master Boot Record File | 219 |
| .DRV | Device Driver | 219 |
| .GROUP | Windows Contacts Group File | 220 |
| .HHK | HTML Help Index | 220 |
| .POL | Windows Policy File | 220 |
| .WEBPNP | Web Point and Print File | 220 |
| .0 | Shared Library Link File | 220 |
| .MSP | Windows Installer Patch | 221 |
| .208 | ASUS Notebook BIOS 208 Update File | 221 |
| .EFI | Extensible Firmware Interface File | 221 |
| .DIAGCAB | Troubleshooting Pack Cabinet File | 221 |
| .BIO | BIOS File | 222 |
| .BASHRC | Bash Non-Interactive Login Shell File | 222 |
| .C32 | Syslinux COM32 Module | 223 |
| .INS | Internet Naming Service File | 224 |
| .IMG3 | iPhone IMG3 File | 225 |
| .3FS | Puppy Linux Save State File | 225 |
| .PDR | Windows Port Driver | 225 |
| .DTHUMB | Android Data Thumbnail | 228 |
| .MOD | GRUB Module | 229 |
| .SDT | Siemens Desktop Theme File | 230 |
| .AOS | ARCHOS PCtablet Firmware File | 230 |
| .BCD | Windows Boot Configuration Data File | 231 |
| .CANNEDSEARCH | Apple Predefined Search | 233 |
| .SAVEDSEARCH | Spotlight Saved Search | 233 |
| .IOPLIST | Mac OS X IOPLIST File | 233 |
| .CNT | Help Contents File | 236 |
| .VXD | Virtual Device Driver | 238 |
| .NLS | Microsoft National Language Support File | 238 |
| .JOB | Windows Task Scheduler Job File | 238 |
| .PPD | PostScript Printer Description File | 239 |
| .WPX | Printer Description File | 240 |
| .SBF | Android System File | 240 |
| .DIT | Active Directory Information Tree File | 240 |
| .HDMP | Windows Heap Dump | 240 |
| .KEY | Security Key | 241 |
| .CRASH | Mac OS X Crash Log File | 242 |
| .CAT | Windows Catalog File | 243 |
| .BOM | Mac OS X Bill of Materials File | 243 |
| .FPBF | Mac OS X Burn Folder | 243 |
| .DEV | Windows Device Driver File | 243 |
| .MUI_CCCD5AE0 | Hid User Library | 243 |
| .LOG2 | Windows Registry Hive Log 2 File | 243 |
| .PROFILE | Bash Shell Profile | 244 |
| .LST | GRUB Boot List File | 244 |
| .SHD | Windows Print Job Shadow File | 244 |
| .NB0 | Device Boot Loader Image | 244 |
| .8XU | TI-83 and TI-84 Plus Operating System File | 244 |
| .PRF | Windows System File | 244 |
| .HLP | Windows Help File | 245 |
| .ADML | Group Policy Language-Specific Administrative Template | 245 |
| .MBN | Multi Boot Image | 245 |
| .SCHEMAS | GConf Schema Definition File | 250 |
| .PANIC | Kernel Panic File | 250 |
| .CPQ | Compaq OEM Disc Configuration File | 250 |
| .IME | Windows Input Method Editor File | 250 |
| .GRP | Windows Program Manager Group | 250 |
| .CHG | Windows Net Logon File | 250 |
| .TDZ | Drobo Firmware File | 250 |
| .KS | Kickstart File | 250 |
| .SWP | Swap File | 250 |
| .SHSH | iPhone/iPod Touch SHSH Blob File | 250 |
| .SBN | Cisco IP Phone Firmware File | 250 |
| .IDX | Index File | 250 |
| .SQM | Service Quality Monitoring File | 250 |
| .386 | Windows Virtual Device Driver | 255 |
| .ODEX | Optimized Dalvik Executable | 255 |
| .HCD | Samsung Android Firmware File | 257 |
| .FLG | Puppy Linux Partition Flag File | 258 |
| .PS2 | Microsoft Search Catalog Index File | 258 |
| .HHC | HTML Help Table of Contents | 258 |
| .WER | Windows Error Report | 261 |
| .PFX | PKCS #12 Certificate File | 262 |
| .ADV | Audio Driver File | 262 |
| .DFU | iOS DFU File | 264 |
| .BLF | CLFS Base Log File | 264 |
| .2FS | Puppy Linux Save State File | 264 |
| .IM4P | IMG4 Payload File | 267 |
| .THA | Windows Thai Noise-Words List File | 267 |
| .PRINTEREXPORT | Windows Printer Migration File | 267 |
| .ICL | Windows Icon Library File | 267 |
| .CPI | Codepage Information File | 267 |
| .8CU | TI-84 Plus C Operating System File | 267 |
| .CHK | Netgear Router Firmware File | 267 |
| .PRO | TurboIntegrator Process Definition File | 267 |
| .DIMAX | DiMAX Firmware Image File | 267 |
| .KO | Linux Kernel Module File | 268 |
| .METADATA_NEVER_INDEX | Spotlight Never Index File | 270 |
| .KEXT | Mac OS X Kernel Extension | 270 |
| .CHT | Windows Chinese Traditional Noise-Word List File | 271 |
| .BMK | Help Bookmarks | 271 |
| .MSSTYLE | Windows XP Unsigned Style | 275 |
| .ATAHD | ATA Hard Drive Flag File | 275 |
| .TRX_DLL | Windows Startup File | 275 |
| .MI4 | Audio Player Firmware File | 275 |
| .NBH | ROM Update Utility Image File | 275 |
| .PRT | Printer Driver File | 278 |
| .NTFS | NTFS Partition File | 280 |
| .CUSTOMDESTINATIONS-MS | Windows Jump List File | 283 |
| .SAVER | Mac OS X Screen Saver | 283 |
| .STR | Windows Screensaver File | 285 |
| .CONFIGPROFILE | Apple Configuration Profile | 286 |
| .XRM-MS | Microsoft Security Certificate | 287 |
| .SPL | Windows Print Spool File | 287 |
| .SO.0 | Unix Shared Library File | 287 |
| .RUF | Samsung DVD and Blu-ray Player Firmware File | 288 |
| .MUM | Windows Vista Update Package | 289 |
| .PS1 | Microsoft Indexing Service Data File | 292 |
| .BK2 | Windows Indexing Service Data File | 295 |
| .CAP | ASUS BIOS Update File | 295 |
| .THUMBNAILS | Android Thumbnails Folder | 295 |
| .DLX | Renamed DLL File | 300 |
| .PID | Creative Driver File | 300 |
| .CMO | ASUS BIOS File | 300 |
| .FID | Microsoft Catalog Indexing Service File | 300 |
| .SIN | Sony Xperia Firmware File | 300 |
| .HSH | Windows Catalog Search Index File | 300 |
| .CHS | Windows Chinese Noise-Word List File | 300 |
| .XFB | Xserve RAID Firmware Binary File | 300 |
| .KWI | Toyota Entune Update File | 300 |
| .UCE | Windows UCE System File | 300 |
| .GMMP | WCS Gamut Map Model Profile | 300 |
| .HPJ | Help Project File | 300 |
| .RFW | Rockchip Firmware File | 300 |
| .EFIRES | EFI Image File | 300 |
| .PROVISIONPROFILE | Apple Provision Profile | 300 |
| .ESCOPY | ES File Explorer File Manager Temporary File | 300 |
| .CM0012 | Configuration Management File | 300 |
| .KDZ | LG Mobile Device Firmware | 300 |
| .TCO2 | TI-Nspire CX II Operating System File | 300 |
| .MUN | Windows System Resource Archive | 300 |
| .B84 | TI-84 Plus CE Bundle Image | 300 |
| .B83 | TI-83 Premium CE Bundle Image | 300 |
| .MEM | Parallels Desktop Memory Dump File | 300 |
| .TA | Sony Firmware File | 300 |
| .LPD | LPD Daemon Print Permissions File | 300 |
| .IFW | INTUS Firmware File | 300 |
| .DIAGPKG | Troubleshooting Pack File | 300 |
| .CPR | Windows Phone Display Settings File | 309 |
| .GRL | Windows Update Status File | 314 |
| .SCF | Windows Explorer Command | 314 |
| .FFA | Find Fast Status File | 320 |
| .EVTX | Windows 7 Event Log File | 320 |
| .FL1 | Lenovo BIOS Update File | 320 |
| .ME | Puppy Linux Partition Flag File | 322 |
| .DYC | Xerox Printer Driver Configuration File | 325 |
| .KBD | Keyboard Layout Script | 325 |
| .DEVICEMETADATA-MS | Device Metadata Package | 325 |
| .PPM | Post Programmable Memory File | 330 |
| .AUTOMATICDESTINATIONS-MS | Windows Jump List File | 333 |
| .BK1 | Windows Indexing Service File | 333 |
| .RC2 | Samsung Mobile Device Firmware File | 333 |
| .FFO | Find Fast Document Properties Cache | 333 |
| .IDI | EVA Controller Event Log | 340 |
| .DSS | DCC Active Designer File | 340 |
| .SB | Slax Bundle | 342 |
| .VGD | Generic CADD VGA Driver | 343 |
| .BUD | Binary Printer Description File | 343 |
| .TRASHES | macOS USB Flash Drive Trash Folder | 344 |
| .IPOD | Rockbox Firmware File | 350 |
| .NETWORKCONNECT | Apple Network Connect Document | 350 |
| .LOCALIZED | macOS Directory Localization File | 350 |
| .FTS | Full Text Search | 350 |
| .WPH | Phoenix BIOS File | 350 |
| .SCAP | EFI Firmware File | 350 |
| .LPD | Lookout Protocol Driver File | 350 |
| .IPTHEME | IconPackager Raw Theme File | 350 |
| .PLASMOID | Plasma Widget | 350 |
| .RCO | PlayStation Portable Resource File | 350 |
| .MYDOCS | Send To My Documents | 350 |
| .QKY | Quirky Kernel | 357 |
| .RS | Windows Rating System File | 357 |
| .JPN | Windows Japanese Noise-Word List File | 364 |
| .WGZ | S60 Web Runtime Widget Package | 367 |
| .SPX | System Profiler XML Report | 375 |
| .KOR | Windows Korean Noise-Words List File | 400 |
| .CDMP | WCS Device Model Profile | 400 |
| .MMV | Magnex Firmware File | 400 |
| .EVT | Windows Event Viewer Log File | 400 |
| .FTG | Full Text Group | 400 |
| .IUS | InfoTMIC Firmware Update File | 400 |
| .DOCK | Mac OS X Dock Extra | 400 |
| .REGLNK | Registry Editor Shortcut File | 400 |
| .RCV | BIOS Recovery File | 400 |
| .TRASHINFO | Linux Trash Metadata File | 400 |
| .89U | TI-89 Titanium Operating System File | 400 |
| .WLU | Windows Legacy Update | 400 |
| .DUB | Windows Spelling Dictionary Identifier | 400 |
| .LM | Language Model File | 400 |
| .FFL | Find Fast Document List | 400 |
| .EMERALD | Emerald Theme | 400 |
| .DIAGCFG | Troubleshooting Pack Configuration File | 400 |
| .VDEX | Validated Dalvik Executable File | 400 |
| .ANN | Help Annotations | 420 |
| .HELP | Mac OS X Help Book | 444 |
| .DIFFBASE | Windows Diagnostics Tracking Diffbase File | 450 |
| .INTERNETCONNECT | Apple Internet Connect Document | 467 |
| .ITS | Internet Document Set | 500 |
| .RVP | Sharp Blu-ray Player Firmware File | 500 |
All Categories
Common File Types
Text Files
Data Files
Audio Files
Video Files
eBook Files
3D Images
Raster Images
Vector Images
Camera Raw Images
Page Layout Files
Spreadsheet Files
Database Files
Executable Files
Game Files
CAD Files
GIS Files
Web Files
Plugin Files
Font Files
System Files
Settings Files
Encoded Files
Compressed Files
Disk Images
Developer Files
Backup Files
Misc Files