| Extension |
File Type |
File Description |
| .s | Developer | Source Code File |
| .s00 | Compressed | ZipSplitter Part 1 Archive |
| .s01 | Compressed | ZipSplitter Part 2 Archive |
| .s02 | Compressed | ZipSplitter Part 3 Archive |
| .s19 | Developer | Motorola S19 File Record |
| .s3i | Audio | Scream Tracker 3 Instrument |
| .s3m | Audio | ScreamTracker 3 Module |
| .s7z | Compressed | Mac OS X 7-Zip File |
| .s85 | Data | Sabre Airline Solutions Chart |
| .sa9 | Plugin | Hue and Cry Photoshop Plug-In |
| .sad | Game | Black & White Audio File |
| .saf | Audio | Secure Audio File (Most common) |
| .safetext | Text | SafeText File |
| .sam | Text | Ami Pro Document (Most common) |
| .sar | Image | Saracen Paint Graphic (Most common) |
| .sas | Developer | SAS Program File |
| .sat | Image | ACIS SAT Model File |
| .sav | Game | Saved Game (Most common) |
| .saveddeck | Web | Nokia Saved Web Page |
| .savedsearch | System | Spotlight Saved Search |
| .saver | System | Mac OS X Screen Saver |
| .sb | Audio | Signed Byte Audio File |
| .sbf | Data | SmartBroker Data |
| .sbi | Audio | Sound Blaster Instrument |
| .sbk | Video | SWiSH Project Backup File (Most common) |
| .sc | Developer | SuperCollider Source Code File |
| .sc2 | Audio | Sample Cell II Instrument Definition |
| .sc4 | Game | Sim City 4 Saved File |
| .sca | Data | Norton AntiVirus Scan File (Most common) |
| .scar | Executable | SCAR Script |
| .scb | Executable | Scala Published Script |
| .scc | Text | Scenarist Closed Caption File |
| .scd | Misc | TurboTax Schedule Description |
| .scf | System | Windows Explorer Command (Most common) |
| .scg | Image | ColorRIX Bitmap Graphic |
| .sch | Data | EAGLE Schematics File |
| .sci | Raster Image | ColorRIX Bitmap Graphic |
| .scm | Game | StarCraft Map File (Most common) |
| .scm | Game | StarCraft Map File (Most common) |
| .scn | Game | SimCity Scenario File (Most common) |
| .scn | Game | SimCity Scenario File (Most common) |
| .scp | Image | ColorRIX Bitmap Graphic |
| .scpt | Executable | AppleScript Script File |
| .scr | Executable | Script File (Most common) |
| .script | Executable | Generic Script File |
| .sct | Raster Image | Scitex Continuous Tone File (Most common) |
| .scu | Image | ColorRIX Bitmap Graphic |
| .scv | Vector Image | ScanVec CASmate Sign File |
| .scw | Text | Movie Magic Screenwriter Document (Most common) |
| .scx | Misc | FoxPro Form (Most common) |
| .sd | Audio | Sound Designer Audio File (Most common) |
| .sd2 | Audio | Sound Designer II File |
| .sda | Image | OpenOffice.org Draw Document |
| .sdb | Data | OpenOffice.org Base Database File (Most common) |
| .sdc | Data | OpenOffice.org Calc Spreadsheet (Most common) |
| .sdd | Misc | StarOffice Presentation |
| .sdf | Data | Standard Data File (Most common) |
| .sdm | Image | Spatial Data Modeling Language File (Most common) |
| .sdn | Compressed | Shareware Distributors Network File |
| .sdp | Data | Session Description Protocol File |
| .sdq | Data | SAS Data File |
| .sdr | Image | SmartDraw Drawing |
| .sds | Audio | MIDI Sample Dump Standard File (Most common) |
| .sdt | Page Layout | SmartDraw Template File (Most common) |
| .sdw | Text | StarOffice Writer Text Document |
| .sdx | Audio | Sample MIDI Dump Exchange |
| .sea | Compressed | Self-Extracting Archive |
| .sec | Misc | PGP Secret Key Ring |
| .seed | Executable | Linux Preseed File |
| .sef | Encoded | Encryptafile Signature File |
| .sen | Compressed | Scifer Internal Header Archive |
| .seo | Data | SEO Note File |
| .seq | Data | DNA Sequence Text File |
| .ser | Data | GeneMapper Project File |
| .ses | Audio | Audition Session |
| .set | Settings | Settings File (Most common) |
| .sew | Misc | Home Embroidery Format |
| .sf | Audio | IRCAM Sound File |
| .sf2 | Audio | SoundFont 2 Sound Bank |
| .sfcache | Misc | ReadyBoost Cache File |
| .sfd | Game | Sofdec Dreamcast Movie |
| .sff | Image | Structured Fax Format |
| .sfk | Audio | Sound Forge Audio Peak File |
| .sfl | Audio | Sound Forge Sound Data File |
| .sfo | Settings | CuteFTP Search File (Most common) |
| .sfs | Compressed | SquashFS File Archive |
| .sfv | Misc | Simple File Verification File |
| .sfvidcap | Video | Sonic Foundry Video Capture File |
| .sfw | Raster Image | Seattle FilmWorks Image |
| .sfx | Compressed | Windows Self-Extracting Archive |
| .sgi | Image | Silicon Graphics Image File |
| .sgm | Text | SGML File |
| .sgml | Data | Standard Generalized Markup Language File |
| .sh | Developer | Bash Shell Script (Most common) |
| .sh3d | Image | Sweet Home 3D Design File |
| .sh3f | Image | Sweet Home 3D Model Library |
| .shar | Compressed | Unix Shar Archive |
| .shb | Executable | Windows Document Shortcut |
| .shg | Raster Image | Segmented Hyper-Graphic |
| .shk | Compressed | ShrinkIt Archive |
| .shn | Audio | Shorten Compressed Audio File |
| .shortcut | Misc | Asutype Shortcut |
| .shp | Image | Shapes File (Most common) |
| .shr | Compressed | Unix Shell Archive File |
| .shs | Executable | Shell Scrap Object File |
| .sht | Web | HTML File with Server Side Includes |
| .shtm | Web | HTML Server Side Include File |
| .shtml | Web | Server Side Include HTML File |
| .shw | Misc | Corel Presentation |
| .shx | Data | Shapefile Index File (Most common) |
| .shy | Encoded | ShyFile Encrypted File |
| .si | Image | Softimage Image Format |
| .sib | Audio | Sibelius Score |
| .sid | Image | MrSID Image (Most common) |
| .sif | Settings | Windows Setup Information File |
| .sig | Text | Signature File (Most common) |
| .sim | Image | Aurora Image |
| .simg | Disk | Synclavier Disk Image File |
| .sims2pack | Game | Downloaded Sims 2 Package File |
| .sis | Misc | Symbian Installation File |
| .sisx | Misc | Symbian OS Installation File |
| .sit | Compressed | Stuffit Archive |
| .site | Web | GoLive Website Project File |
| .sitx | Compressed | Stuffit X Archive |
| .sk2 | Vector Image | ChemSketch Drawing |
| .skb | Backup | SketchUp Backup Document |
| .skc | Data | SideKick Card File |
| .ski | Settings | Motorola Phone Skin File |
| .skindex | Misc | Mail Index File |
| .skl | Image | Maya Skeleton File |
| .skp | Image | SketchUp Document |
| .skr | Misc | PGP Private Keyring |
| .skv | Data | Semicolon Separated Values File (Most common) |
| .skx | Data | XLANG Schedule File |
| .skz | Settings | SuperKaramba Theme |
| .sl | Settings | Software License File |
| .sldasm | Image | SolidWorks Assembly File |
| .slddrt | Vector Image | SolidWorks Sheet File |
| .slddrw | Vector Image | SolidWorks Drawing File |
| .sldprt | Image | SolidWorks Part File |
| .sle | Data | Sisulizer Package File |
| .sln | Developer | Visual Studio Solution File |
| .slp | Data | Sisulizer Project File |
| .sls | Text | Image Playlist |
| .slt | Settings | Mozilla User Profile Folder |
| .sma | Developer | AMX Mod Plugin Source File |
| .smc | Game | Super Nintendo Game ROM |
| .smd | Game | Sega Mega Drive ROM |
| .smf | Audio | Standard MIDI File |
| .smi | Video | SMIL Presentation (Most common) |
| .smil | Video | SMIL Presentation File |
| .smk | Video | Smacker Compressed Movie File |
| .smm | Misc | Ami Pro Macro |
| .smp | Audio | SampleVision Audio Sample Format (Most common) |
| .sms | Text | Exported SMS Text Message (Most common) |
| .smv | Video | VideoLink Mail Video |
| .sn1 | Backup | Drive Snapshot First Differential Backup |
| .sn2 | Backup | Drive Snapshot Second Differential Backup |
| .sna | Backup | Drive Snapshot Primary Backup File |
| .snd | Audio | Sound File (Most common) |
| .sng | Audio | MIDI Song File |
| .snippet | Developer | Visual Studio IntelliSense Code Snippet |
| .snm | Misc | Netscape Mail Index |
| .snp | Page Layout | Access Report Snapshot |
| .so | Developer | Shared Library |
| .sol | Settings | Flash Local Shared Object File |
| .sopt | Disk | Synclavier Optical Disk Image File |
| .sou | Audio | SBStudio II Sound File |
| .soundpack | Data | SoundPackager Sound Package |
| .sp | Page Layout | SignPlot Traffic Sign File |
| .sparsebundle | Disk | Mac OS X Sparse Bundle |
| .sparseimage | Disk | Mac OS X Sparse Image |
| .spc | Image | Spectrum 512 Compressed Image |
| .spd | Encoded | Sealed Acrobat Document |
| .spdf | Encoded | Sealed PDF |
| .spe | Raster Image | WinSpec CCD Capture File |
| .spg | Backup | TCP Optimizer Backup File |
| .spiff | Image | Still Picture Interchange File Format |
| .spl | Video | FutureSplash Animation |
| .spo | Data | SPSS Statistical Data Output File |
| .spp | Raster Image | PhotoPlus Picture File |
| .sppack | Audio | SPPack Sound Sample |
| .spr | Executable | FoxPro Generated Screen File (Most common) |
| .sprg | Audio | Synclavier Program File |
| .sprite | Game | SuperTux Sprite File |
| .sps | Data | SPSS Program File |
| .spt | Developer | ESPL Programming File (Most common) |
| .spu | Image | Spectrum 512 Image |
| .spub | Data | Disc Cover File |
| .spv | Data | SPSS Output File |
| .sq | Data | Sysquake Program |
| .sqb | Backup | SQL Backup SQL Server Backup File |
| .sqd | Data | SQ Data File |
| .sqfs | Disk | Squash FS Bootable File |
| .sql | Data | Structured Query Language Data |
| .sqm | Misc | Service Quality Monitoring File (Most common) |
| .sqr | Data | SQL Program File |
| .sqx | Compressed | SQX Archive |
| .sqz | Compressed | Squeezed Video File |
| .sr | Image | Sun Raster Image File |
| .sr0 | Misc | SecuROM Analysis File |
| .src | Developer | Source Code |
| .srf | Image | Sony Raw Image File (Most common) |
| .srm | Game | Super Nintendo ROM Save File |
| .srs | Settings | Outlook Send/Receive Settings File |
| .srt | Video | Subtitle File |
| .ssa | Text | Sub Station Alpha Subtitle File |
| .ssc | Developer | SourceSafe Status File |
| .ssd | Misc | WindowBlinds Skin File List |
| .sseq | Audio | Synclavier Sequence File |
| .sslf | Misc | HLSW Shared Server List File |
| .ssm | Video | Standard Streaming Metafile |
| .ssnd | Audio | Synclavier Sound File |
| .sss | Settings | WindowBlinds Substyle File |
| .ssw | Misc | Sony Ericsson Firmware File |
| .st | Disk | Atari ST Disk Image |
| .sta | Data | ABAQUS Status File |
| .stc | Data | StarOffice Calc Spreadsheet Template |
| .std | Image | StarOffice Drawing Template (Most common) |
| .step | Image | STEP 3D Model |
| .sth | Misc | Lotus Domino Stash File |
| .sti | Misc | StarOffice Presentation Template |
| .stk | Data | Stickfigure Animator File |
| .stl | Image | Stereolithography File (Most common) |
| .stm | Data | Exchange Streaming Media File (Most common) |
| .stmb | Misc | Synclavier Timbre File |
| .stml | Web | SSI HTML File |
| .sto | Image | PRO100 3D Interior Design Project |
| .stp | Image | STEP 3D CAD File |
| .str | Data | dBASE Structure List Object File (Most common) |
| .strings | Text | Text Strings File |
| .stt | Data | Streets & Trips Map Template |
| .stw | Text | StarOffice Text Document Template (Most common) |
| .stx | Video | Pinnacle Studio Project File (Most common) |
| .sty | Text | LaTeX Style (Most common) |
| .styk | Data | Stykz Stick Figure |
| .stykz | Data | Stykz Animation |
| .style | Settings | SketchUp Style |
| .sub | Text | Subtitle File (Most common) |
| .sud | Developer | Super Project Analyzer File (Most common) |
| .suf | Encoded | Ccrypt Encrypted File |
| .suit | Font | Macintosh Font Suitcase |
| .sun | Image | Sun Raster Graphic |
| .suniff | Image | Sun TAAC Graphic |
| .suo | Developer | Visual Studio Solution User Options File |
| .sup | Image | Subtitle Bitmap File (Most common) |
| .sv5 | Game | BigJig Saved Puzzle |
| .sv6 | Game | RollerCoaster Tycoon 2 Saved Game |
| .svc | Data | IIS Special Content File |
| .svg | Vector Image | Scalable Vector Graphics File |
| .svgz | Vector Image | Compressed SVG File |
| .svi | Video | Samsung Video File |
| .svn-work | Misc | Subversion Cache File |
| .svr | Web | Compressed Virtual World |
| .svs | Game | Game Boy Advance Saved State File |
| .svx | Audio | 8SVX Sound File |
| .sw | Audio | Signed Word Audio File |
| .sw2 | Settings | Softwrap License File |
| .swa | Audio | ShockWave Audio |
| .swc | Developer | Flex Components Archive (Most common) |
| .swd | Developer | Flash Debug File |
| .swf | Video | Flash Movie |
| .swi | Video | SWiSH Project File |
| .switch | Encoded | Switch Package |
| .swk | Data | StudyWorks Save File |
| .swp | System | Swap File |
| .swt | Video | Flash Generator Template |
| .sxc | Data | StarOffice Calc Spreadsheet |
| .sxd | Image | StarOffice Drawing |
| .sxi | Data | StarOffice Impress Presentation |
| .sxm | Misc | StarOffice Math File |
| .sxw | Text | StarOffice Writer Text Document |
| .syh | Audio | Synchomatic Instrument |
| .sys | System | Windows System File (Most common) |
| .syw | Audio | Yamaha SY99/SY85 Audio File |
| .syx | Audio | MIDI System Exclusive Message |
| .sz | Settings | Winamp Classic Skin Download |
