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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 |
|---|---|---|
| .DLL | Dynamic Link Library | 174 |
| .ICO | Icon File | 192 |
| .LNK | Windows File Shortcut | 177 |
| .DRV | Device Driver | 226 |
| .SYS | Windows System File | 190 |
| .CAB | Windows Cabinet File | 182 |
| .CUR | Windows Cursor | 165 |
| .CPL | Windows Control Panel Item | 181 |
| .DMP | Windows Memory Dump | 177 |
| .ICNS | macOS Icon Resource File | 188 |
| .DESKTHEMEPACK | Windows 8 Desktop Theme Pack File | 175 |
| .HLP | Windows Help File | 260 |
| .SWP | Swap File | 250 |
| .MSP | Windows Installer Patch | 229 |
| .REG | Registry File | 162 |
| .THEME | Microsoft Plus! Desktop Theme | 197 |
| .SCR | Windows Screensaver | 174 |
| .PRF | Windows System File | 262 |
| .SCF | Windows Explorer Command | 315 |
| .ANI | Windows Animated Cursor | 175 |
| .SDB | Custom Application Compatibility Database | 209 |
| .FPBF | Mac OS X Burn Folder | 300 |
| .WDGT | Dashboard Widget | 187 |
| .PFX | PKCS #12 Certificate File | 268 |
| .PROFILE | Bash Shell Profile | 200 |
| .BASH_HISTORY | Bash History File | 141 |
| .BASHRC | Bash Non-Interactive Login Shell File | 217 |
| .BASH_PROFILE | Bash Interactive Login Shell File | 209 |
| .ELF | Executable and Linkable Format File | 221 |
| .EDJ | Enlightenment Theme File | 200 |
| .GROUP | Windows Contacts Group File | 250 |
| .NB0 | Device Boot Loader Image | 271 |
| .PCK | System Center Configuration Manager Package File | 165 |
| .BCD | Windows Boot Configuration Data File | 190 |
| .PROP | Android Build Properties File | 193 |
| .PWL | Windows Password List | 200 |
| .KEXT | Mac OS X Kernel Extension | 286 |
| .VXD | Virtual Device Driver | 235 |
| .IDX | Index File | 253 |
| .NT | Windows NT Startup File | 150 |
| .KEY | Security Key | 250 |
| .KBD | Keyboard Layout Script | 333 |
| .MSC | Microsoft Management Console Snap-in Control File | 181 |
| .CNT | Help Contents File | 227 |
| .POL | Windows Policy File | 229 |
| .HHC | HTML Help Table of Contents | 217 |
| .HHK | HTML Help Index | 220 |
| .MANIFEST | Windows Application Manifest File | 192 |
| .MDMP | Windows Minidump | 186 |
| .ION | File Description File | 176 |
| .PDR | Windows Port Driver | 220 |
| .PREFPANE | Mac OS X System Preference Pane | 300 |
| .ODEX | Optimized Dalvik Executable | 261 |
| .PNF | Precompiled INF File | 206 |
| .DESKLINK | Desktop Shortcut | 200 |
| .MAPIMAIL | Send To Mail Recipient | 175 |
| .MYDOCS | Send To My Documents | 350 |
| .SQM | Service Quality Monitoring File | 254 |
| .ADM | Administrative Template File | 218 |
| .MSSTYLES | Windows XP Style | 213 |
| .SYS | Motorola Driver File | 209 |
| .MUI | Multilingual User Interface File | 203 |
| .HDMP | Windows Heap Dump | 214 |
| .SAVER | Mac OS X Screen Saver | 250 |
| .HTT | Hypertext Template File | 169 |
| .PK2 | Silkroad Online Game Data File | 176 |
| .SAVEDSEARCH | Spotlight Saved Search | 400 |
| .NFO | System Information File | 176 |
| .PPD | PostScript Printer Description File | 243 |
| .HPJ | Help Project File | 300 |
| .ICL | Windows Icon Library File | 267 |
| .MUM | Windows Vista Update Package | 283 |
| .WGZ | S60 Web Runtime Widget Package | 367 |
| .CGZ | Linux Drivers Archive | 350 |
| .CPI | Codepage Information File | 292 |
| .KO | Linux Kernel Module File | 262 |
| .ETL | Microsoft Event Trace Log File | 203 |
| .LOG2 | Windows Registry Hive Log 2 File | 225 |
| .LOG1 | Windows Registry Hive Log File | 167 |
| .EVT | Windows Event Viewer Log File | 400 |
| .RMT | Router Firmware File | 225 |
| .MI4 | Audio Player Firmware File | 200 |
| .CRASH | Mac OS X Crash Log File | 280 |
| .CLB | COM+ Catalog File | 186 |
| .ICONPACKAGE | IconPackager Theme File | 163 |
| .NLS | Microsoft National Language Support File | 320 |
| .RFW | Rockchip Firmware File | 300 |
| .WDF | Windows Driver Foundation File | 200 |
| .MOBILECONFIG | Apple Mobile Configuration File | 197 |
| .JOB | Windows Task Scheduler Job File | 225 |
| .MLC | Microsoft Language Interface Pack | 200 |
| .EFI | Extensible Firmware Interface File | 227 |
| .WPH | Phoenix BIOS File | 350 |
| .EVTX | Windows 7 Event Log File | 325 |
| .ADMX | Group Policy Administrative Template File | 162 |
| .DIAGCAB | Troubleshooting Pack Cabinet File | 227 |
| .WEBPNP | Web Point and Print File | 250 |
| .SBN | Cisco IP Phone Firmware File | 250 |
| .BLF | CLFS Base Log File | 241 |
| .REGTRANS-MS | Registry Transaction Log File | 172 |
| .DAT | Windows Registry Hive File | 200 |
| .LST | GRUB Boot List File | 223 |
| .SHD | Windows Print Job Shadow File | 262 |
| .SPL | Windows Print Spool File | 300 |
| .HELP | Mac OS X Help Book | 433 |
| .DIT | Active Directory Information Tree File | 240 |
| .ASEC | Android Secure Application File | 187 |
| .SHSH | iPhone/iPod Touch SHSH Blob File | 250 |
| .LPD | Lookout Protocol Driver File | 350 |
| .SEARCHCONNECTOR-MS | Windows Search Connector File | 200 |
| .LIBRARY-MS | Windows Library Description File | 220 |
| .HIV | Windows Registry Hive File | 133 |
| .PAT | DiskStation Manager Installation File | 183 |
| .SBF | Android System File | 235 |
| .CPR | Windows Phone Display Settings File | 310 |
| .ITEMDATA-MS | Windows 8 Start Screen Item Data File | 250 |
| .CAT | Windows Catalog File | 241 |
| .ZONE.IDENTIFIER | Windows Zone Identifier File | 180 |
| .LOCKFILE | Mac OS X PLIST Lock File | 300 |
| .BIN | Router Firmware File | 207 |
| .IUS | InfoTMIC Firmware Update File | 400 |
| .C32 | Syslinux COM32 Module | 216 |
| .AML | ACPI Machine Language File | 156 |
| .FOTA | Firmware Over-the-Air File | 195 |
| .2FS | Puppy Linux Save State File | 269 |
| .IMG3 | iPhone IMG3 File | 233 |
| .EFIRES | EFI Image File | 367 |
| .MTZ | MIUI Theme | 215 |
| .H1S | Windows Assistance Platform Help File | 195 |
| .DRPM | Delta RPM File | 225 |
| .INF_LOC | Windows Driver Information Cache File | 200 |
| .EBD | Windows EBD System File | 160 |
| .CONFIGPROFILE | Apple Configuration Profile | 200 |
| .PROVISIONPROFILE | Apple Provision Profile | 300 |
| .IDI | EVA Controller Event Log | 300 |
| .ESCOPY | ES Explorer Temporary File | 300 |
| .SERVICE | Systemd Service Unit File | 300 |
| .FFA | Find Fast Status File | 250 |
| .FFL | Find Fast Document List | 400 |
| .FFO | Find Fast Document Properties Cache | 250 |
| .FFX | Microsoft Find Fast Index | 200 |
| .INS | Internet Naming Service File | 233 |
| .GRP | Windows Program Manager Group | 250 |
| .VGA | VGA Display Driver | 200 |
| .VGD | Generic CADD VGA Driver | 317 |
| .DSS | DCC Active Designer File | 340 |
| .DEV | Windows Device Driver File | 220 |
| .ANN | Help Annotations | 400 |
| .FTS | Full Text Search | 250 |
| .FTG | Full Text Group | 400 |
| .BMK | Help Bookmarks | 375 |
| .WER | Windows Error Report | 250 |
| .SFCACHE | ReadyBoost Cache File | 191 |
| .MSSTYLE | Windows XP Unsigned Style | 275 |
| .EMERALD | Emerald Theme | 400 |
| .METADATA_NEVER_INDEX | Spotlight Never Index File | 300 |
| .BOM | Mac OS X Bill of Materials File | 217 |
| .XRM-MS | Microsoft Security Certificate | 317 |
| .AOS | ARCHOS PCtablet Firmware File | 229 |
| .8XU | TI-83 and TI-84 Plus Operating System File | 244 |
| .BIO | BIOS File | 233 |
| .PANIC | Kernel Panic File | 400 |
| .MEM | Parallels Desktop Memory Dump File | 275 |
| .IPTHEME | IconPackager Raw Theme File | 350 |
| .RCO | PlayStation Portable Resource File | 350 |
| .0 | Shared Library Link File | 209 |
| .SO.0 | Unix Shared Library File | 250 |
| .MBR | Master Boot Record File | 208 |
| .ADML | Group Policy Language-Specific Administrative Template | 242 |
| .CDMP | WCS Device Model Profile | 400 |
| .GMMP | WCS Gamut Map Model Profile | 300 |
| .DIAGCFG | Troubleshooting Pack Configuration File | 400 |
| .DIAGPKG | Troubleshooting Pack File | 450 |
| .PRINTEREXPORT | Windows Printer Migration File | 267 |
| .CI | Windows Content Indexer Catalog File | 200 |
| .LPD | LPD Daemon Print Permissions File | 300 |
| .CHG | Windows Net Logon File | 267 |
| .SCHEMAS | GConf Schema Definition File | 400 |
| .IPOD | Rockbox Firmware File | 350 |
| .RC1 | Samsung Mobile Device Firmware File | 192 |
| .RC2 | Samsung Mobile Device Firmware File | 450 |
| .VX_ | Compressed Virtual Device Driver File | 200 |
| .PPM | Post Programmable Memory File | 325 |
| .SCAP | EFI Firmware File | 380 |
| .AUTOMATICDESTINATIONS-MS | Windows Jump List File | 322 |
| .MOD | GRUB Module | 325 |
| .CHK | Netgear Router Firmware File | 268 |
| .SDT | Siemens Desktop Theme File | 179 |
| .DFU | iOS DFU File | 275 |
| .73U | TI-73 Explorer Operating System File | 150 |
| .NTFS | NTFS Partition File | 333 |
| .CPQ | Compaq OEM Disc Configuration File | 250 |
| .IME | Windows Input Method Editor File | 233 |
| .NBH | ROM Update Utility Image File | 275 |
| .FX | ReadyBoot Trace File | 262 |
| .IFW | INTUS Firmware File | 350 |
| .SB | Slax Bundle | 314 |
| .TDZ | Drobo Firmware File | 400 |
| .KS | Kickstart File | 300 |
| .UCE | Windows UCE System File | 325 |
| .TRX_DLL | Windows Startup File | 267 |
| .BUD | Binary Printer Description File | 325 |
| .3FS | Puppy Linux Save State File | 200 |
| .INTERNETCONNECT | Apple Internet Connect Document | 450 |
| .NETWORKCONNECT | Apple Network Connect Document | 400 |
| .MUI_CCCD5AE0 | Hid User Library | 267 |
| .TIMER | Systemd Unit Configuration File | 400 |
| .XFB | Xserve RAID Firmware Binary File | 314 |
| .MBN | Multi Boot Image | 250 |
| .CAP | ASUS BIOS Update File | 307 |
| .SPX | System Profiler XML Report | 375 |
| .8CU | TI-84 Plus C Operating System File | 250 |
| .208 | ASUS Notebook BIOS 208 Update File | 222 |
| .HCD | Samsung Android Firmware File | 220 |
| .FL1 | Lenovo BIOS Update File | 275 |
| .IM4P | IMG4 Payload File | 325 |
| .CANNEDSEARCH | Apple Predefined Search | 267 |
| .FTF | FlashTool Firmware File | 171 |
| .CUSTOMDESTINATIONS-MS | Windows 7 Jump List File | 308 |
| .DEVICEMETADATA-MS | Device Metadata Package | 367 |
| .MMV | Magnex Firmware File | 400 |
| .FIRM | Boot9Strap 3DS Firmware File | 300 |
| .CMO | ASUS BIOS File | 400 |
| .SIN | Sony Xperia Firmware File | 400 |
| .TRASHES | macOS USB Flash Drive Trash Folder | 400 |
| .PRO | TurboIntegrator Process Definition File | 267 |
| .THUMBNAILS | Android Thumbnails Folder | 250 |
| .DVD | DOS Device Driver | 178 |
| .ITS | Internet Document Set | 500 |
| .PID | Creative Driver File | 329 |
| .PRT | Printer Driver File | 278 |
| .STR | Windows Screensaver File | 285 |
| .WPX | Printer Description File | 275 |
| .GRL | Windows Update Status File | 350 |
| .QVM | Q Virtual Machine | 209 |
| .386 | Windows Virtual Device Driver | 231 |
| .RUF | Samsung DVD and Blu-ray Player Firmware File | 286 |
| .DYC | Xerox Printer Driver Configuration File | 325 |
| .DLX | Renamed DLL File | 400 |
| .DTHUMB | Android Data Thumbnail | 235 |
| .BK1 | Windows Indexing Service File | 380 |
| .BK2 | Windows Indexing Service Data File | 307 |
| .PS1 | Microsoft Indexing Service Data File | 400 |
| .FID | Microsoft Catalog Indexing Service File | 300 |
| .HSH | Windows Catalog Search Index File | 300 |
| .000 | Indexing Service Data File | 194 |
| .PS2 | Microsoft Search Catalog Index File | 300 |
| .CHS | Windows Chinese Noise-Word List File | 300 |
| .JPN | Windows Japanese Noise-Word List File | 362 |
| .KOR | Windows Korean Noise-Words List File | 400 |
| .THA | Windows Thai Noise-Words List File | 267 |
| .CHT | Windows Chinese Traditional Noise-Word List File | 300 |
| .LFS | Samsung Phone params.lfs File | 200 |
| .PIT | Samsung Phone Firmware File | 211 |
| .ME | Puppy Linux Partition Flag File | 340 |
| .RS | Windows Rating System File | 300 |
| .DIMAX | DiMAX Firmware Image File | 220 |
| .ATAHD | ATA Hard Drive Flag File | 275 |
| .IOPLIST | Mac OS X IOPLIST File | 300 |
| .ADV | Audio Driver File | 271 |
| .FLG | Puppy Linux Partition Flag File | 255 |
| .QKY | Quirky Kernel | 380 |
| .RVP | Sharp Blu-ray Player Firmware File | 500 |
| .CM0013 | Samsung Smart TV Index File | 213 |
| .TA | Sony Firmware File | 300 |
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