| .TORRENT |
BitTorrent Metainfo File |
| .MSO |
Microsoft Office HTML/OLE Data Stream (oledata.mso) |
| .MD5 |
MD5 Checksum File |
| .SHS |
Shell Scrap Object File |
| .DDD |
Adobe Acrobat Distiller file |
| .DWL |
Drawing Lock File (CAD) |
| .THUMBDATA4--1967290299 |
Android Gallery Thumbnail Cache (.thumbdata) |
| .PES |
Brother/Babylock PES Embroidery File |
| .JSF |
JavaScript Fireworks batch script (Adobe Fireworks) |
| .TGS |
Telegram Animated Sticker (gzip-compressed Lottie JSON) - dominant meaning |
| .P7S |
PKCS #7 / S/MIME Digital Signature (smime.p7s) |
| .THUMBDATA3--1967290299 |
Android Gallery Thumbnail Cache (.thumbdata3 index) |
| .XMP |
Extensible Metadata Platform (sidecar metadata file) |
| .CTG |
Canon Digital Camera Catalog File |
| .CRD |
Windows Cardfile Database |
| .LDB |
Microsoft Access Record-Locking Information File |
| .CHK |
Recovered File Fragment (CHKDSK / ScanDisk) |
| .OST |
Outlook Offline Storage Table |
| .NULL |
NULL File - placeholder / empty / mislabeled file |
| .DSC |
Nikon Disk Identification File (.dsc) |
| .UPG |
Firmware Upgrade File |
| .UNKNOWN |
Unknown / Unrecognized File |
| .IDX |
Index File (generic application/database index) |
| .CACHE |
Cache File (generic temporary cache) |
| .VMG |
Nokia / Samsung Text Message (vMessage) |
| .FILE |
Generic / Renamed File (extension literally ".file") |
| .TEC |
TECkit Compiled Mapping (Text Encoding Conversion) |
| .MTA |
Samsung AllShare metadata file |
| .ID |
HCL Notes (Lotus Notes) ID File |
| .LCK |
Lock File |
| .EXT |
Generic Email Attachment File |
| .THUMBDATA |
Android Gallery Thumbnail Cache |
| .TPL |
Template File |
| .LOCK |
Lock File |
| .1 |
Unix Manual Page (section 1 - user commands) |
| .MRK |
DPOF Auto Print Order File |
| .TOC |
Eudora Table of Contents file |
| .AQQ |
AQQ Instant Messenger File |
| .SFV |
Simple File Verification checksum list |
| .INDEX |
Eclipse Help Index |
| .SNT |
Windows Sticky Notes data file (legacy StickyNotes.snt) |
| .RWZ |
Microsoft Outlook Rules Wizard File |
| .DIC |
Spell-Checker Dictionary File |
| .CDG |
CD+G Karaoke Graphics |
| .!UT |
uTorrent incomplete download file |
| .THUMBDATA4--1763508120 |
Android Gallery Thumbnail Cache (.thumbdata) |
| .IPA |
iOS App Store Package |
| .THUMBDATA3--1763508120 |
Android Gallery Thumbnail Cache (.thumbdata3) |
| .MLT |
Forecast Pro Multivariate Text File |
| .LAY |
DVD Studio Pro Layout File |
| .CVR |
Microsoft Office Crash Report File |
| .JAD |
Java Application Descriptor |
| .B |
Lotus Applause Batch List File |
| .ZZZ |
Generic Placeholder / Temporary File (.zzz) |
| .PT |
Panther Page Template |
| .THUMBDATA4 |
Android Gallery Thumbnail Cache (.thumbdata4) |
| .TLS |
TuneUp Utilities Logon Screen File |
| .FRP |
Delrina PerForm / FormFlow Form (.frp) |
| .CHW |
Microsoft Compiled HTML Help Full-Text Search Index |
| .SP |
SPICE Circuit Simulation Netlist / Data File |
| .SHA256 |
SHA-256 Checksum File |
| .SPBM |
VMware vSphere Storage Policy Based Management Data File |
| .UNL |
Garmin MapSource Unlock File |
| .CRC |
CRC Checksum File |
| .SB3 |
Scratch 3.0 Project File |
| .RLD |
Norton Commander 5.0 Temporary File |
| .VMSG |
VMware Localization Message File |
| .DID |
Adobe Distiller Job Options / Watched Folder Descriptor |
| .SHA1 |
SHA-1 Checksum File |
| .PPK |
PuTTY Private Key File |
| .SPL7 |
sPlan 7 Schematic Diagram File |
| .VER |
Version Description File |
| .MVI |
AutoCAD AutoFlix Movie Command File |
| .TMB |
Thumbnail Image File |
| .SWP |
Vim Swap File |
| .RAG |
RAM Advanse Generator File |
| .IDLK |
Adobe InDesign Lock File |
| .VI2 |
Kaspersky Anti-Virus Quarantine Data File |
| .TEMP |
Temporary File |
| .AC$ |
AutoCAD undo info file |
| .IPK |
Itsy Package (opkg package) |
| .SUM |
Garmin Checksum File |
| .UID |
IBM VoiceType User Data File |
| .PLE |
Messenger Plus! Live Encrypted Log File |
| .MI |
AutoVue Graphic Plugin |
| .ING |
MasterCook Ingredients File |
| .RFC |
RoboForm Contact File |
| .CUL |
Windows Cursor Library |
| .PIMX |
Adobe Extension Manager Package (PIMX) |
| .INETLOC |
macOS Internet Location File |
| .18 |
IBM VoiceType Languages Scripts Data |
| .MAGNET |
Magnet Link File |
| .DESKTOP |
XDG Desktop Entry File |
| .SLF |
Symantec License File |
| .RSF |
MacDrive Macintosh Resource Fork File |
| .CXF |
Google Picasa Collage File |
| .HPROF |
Java Heap/CPU Profiling Dump (HPROF) |
| .LINK |
Generic symbolic link / hyperlink reference file |
| .ANNOT |
Adobe Digital Editions Annotations File |
| .VIR |
Virus Infected File (renamed by antivirus) |
