| Extension |
File Type |
File Description |
| .s | Developer | Source Code File |
| .s | 3D Image | Microsoft Train Simulator Shape File |
| .s00 | Compressed | ZipSplitter Part 1 Archive |
| .s01 | Compressed | ZipSplitter Part 2 Archive |
| .s02 | Compressed | ZipSplitter Part 3 Archive |
| .s10 | Game | Brasfoot Saved Game File |
| .s19 | Developer | Motorola S19 File Record |
| .s2m | Game | Stronghold 2 Map File |
| .s2mh | Game | StarCraft 2 Map Header File |
| .s2ml | Settings | StarCraft 2 Map Localization File |
| .s2mv | Raster Image | StarCraft 2 Map Preview File |
| .s2qh | Settings | StarCraft 2 Localization Header File |
| .s2ql | Settings | StarCraft 2 Unit Localization File |
| .s2z | Game | Heroes of Newerth Game Data File |
| .s3i | Audio | Scream Tracker 3 Instrument |
| .s3m | Audio | ScreamTracker 3 Module |
| .s3z | Audio | Compressed Scream Tracker 3 Module |
| .s4m | Game | SWAT 4 Map File |
| .s5x | Game | Heritage of Kings: The Settlers Map File |
| .s7z | Compressed | Mac OS X 7-Zip File |
| .s85 | Data | Sabre Airline Solutions Chart |
| .sa1 | Game | Game Boy Emulator Save File |
| .sa9 | Plugin | Hue and Cry Photoshop Plug-in |
| .sab | CAD | ACIS SAB Model File |
| .sad | Game | Black & White Audio File |
| .saf | GIS | Street Atlas USA Map File |
| .saf | Audio | Secure Audio File |
| .saf | Text | SafeText File |
| .safariextz | Plugin | Apple Safari Extension Package |
| .safetext | Text | SafeText File |
| .sam | Audio | MOD Edit Sample File |
| .sam | Data | Samurize Package |
| .sam | Text | Ami Pro Document |
| .sam07 | Data | SAM 2007 Package |
| .sap | Audio | Atari SAP Music File |
| .sar | Data | Sibelius Arrange Style |
| .sar | Raster Image | Saracen Paint Image |
| .sar | Compressed | Service Archive File |
| .sas | Developer | SAS Program File |
| .sat | CAD | ACIS SAT Model File |
| .sav | Backup | Parallels Desktop Saved State Image File |
| .sav | Game | Saved Game |
| .sav | Game | Nintendo DS Save File |
| .sav | Data | SPSS Data File |
| .save | Text | Nano Temporary Save File |
| .saveddeck | Web | Nokia Saved Web Page |
| .savedsearch | System | Spotlight Saved Search |
| .saver | System | Mac OS X Screen Saver |
| .sb | Developer | Small Basic Source Code File |
| .sb | Developer | Scratch Project File |
| .sb | Audio | Signed Byte Audio File |
| .sbb | Backup | Office Accounting Company Backup File |
| .sbc | Misc | Office Accounting Company Shortcut File |
| .sbd | Data | Office Accounting Company Data File |
| .sbd | Data | Superbase Data Definition File |
| .sbf | Database | Superbase Database File |
| .sbf | Data | SmartBroker Data |
| .sbf | System | Android System File |
| .sbg | Audio | SBaGen Binaural Beat File |
| .sbi | Audio | Sound Blaster Instrument |
| .sbk | Audio | E-MU SoundFont Sound Bank |
| .sbk | Misc | Multimedia ToolBook System Book |
| .sbk | Video | SWiSH Project Backup File |
| .sbk | Page Layout | Scrapbook Factory File |
| .sbn | GIS | ESRI Spatial Binary File |
| .sbn | System | Cisco IP Phone Firmware File |
| .sbn | GIS | GT-31 Binary Data File |
| .sbp | CAD | OpenSBP CNC Program File |
| .sbproj | Developer | OpenGL Shader Builder Project |
| .sbq | Data | Superbase QuickReports File |
| .sbr | Developer | Visual Studio Source Browser Intermediate File |
| .sbs | Backup | Secure Backup System File |
| .sbs | Executable | SPSS Script |
| .sbt | Video | SBT Subtitle File |
| .sbt | Data | Superbase Data Notes File |
| .sbv | Page Layout | Superbase Form Definition File |
| .sbv | Settings | YouTube Captions File |
| .sbw | Data | US Treasury Savings Bonds Wizard File |
| .sbx | Compressed | GLBasic Shoebox File |
| .sbx | Data | ESRI Spatial Index File |
| .sc | Developer | SuperCollider Source Code File |
| .sc2 | Game | SimCity 2000 City File |
| .sc2 | Audio | Sample Cell II Instrument Definition |
| .sc2archive | Game | Blizzard StarCraft 2 Archive File |
| .sc2assets | Game | Blizzard StarCraft 2 Assets File |
| .sc2bank | Game | StarCraft 2 Bank File |
| .sc2data | Game | Blizzard StarCraft 2 Data File |
| .sc2locale | Misc | Blizzard StarCraft 2 Localization File |
| .sc2ma | Game | StarCraft 2 Map Data File |
| .sc2map | Game | Blizzard StarCraft 2 Map File |
| .sc2mod | Game | Blizzard StarCraft 2 Modification File |
| .sc2replay | Game | Blizzard StarCraft 2 Replay File |
| .sc2save | Game | Blizzard StarCraft 2 Saved Game |
| .sc2scene | Game | StarCraft 2 Cut Scene File |
| .sc3 | Game | SimCity 3000 City File |
| .sc4 | Game | SimCity 4 Saved File |
| .sc45 | Data | SuperCard Project File |
| .sc4desc | Game | SimCity 4 Description File |
| .sc4lot | Game | SimCity 4 Lot File |
| .sc4model | 3D Image | SimCity 4 Model File |
| .sca | Executable | Scala Script File |
| .sca | Data | Norton AntiVirus Scan File |
| .scacfg | Settings | SuperCard Application Configuration File |
| .scad | CAD | OpenSCAD Script |
| .scap | System | EFI Firmware File |
| .scar | Executable | SCAR Script |
| .scb | Executable | Scala Published Script |
| .scc | Text | Scenarist Closed Caption File |
| .scc | Video | ScreenFlow Screen Recording |
| .scc | Developer | SourceSafe Source Code Control File |
| .scd | Data | Data Rescue Saved Scan File |
| .scd | Data | TurboTax Tax Schedule List |
| .scea | Game | Aleph One Map File |
| .scene | Game | Antibody Level File |
| .scexcludb | Data | Spring Cleaning Exclusions File |
| .scf | Data | DNA Sequence Chromatogram File |
| .scf | Game | SimTown Sounds File |
| .scf | System | Windows Explorer Command |
| .scg | Raster Image | ColoRIX Image File |
| .scg | Data | myPM SCG Definition File |
| .sch | Data | EAGLE Schematics File |
| .sch | Settings | Strater Scheme File |
| .sch | Data | SuperCard Help Project File |
| .schemas | System | GConf Schema Definition File |
| .schematic | Game | MCEdit Schematic File |
| .sci | Raster Image | ColoRIX Graphics Image |
| .scm | Video | Super Chain Media File |
| .scm | Video | ScreenCam Screen Recording |
| .scm | Data | Samsung Channel List File |
| .scm | Plugin | GIMP Script-Fu Script |
| .scm | Game | CLEO Compiled Script |
| .scm | Text | Schema File |
| .scm | Game | StarCraft Map File |
| .scn | Game | OpenTTD Scenario File |
| .scn | Game | SimCity Scenario File |
| .scn | Game | Age of Mythology Scenario File |
| .scn | Video | Pinnacle Studio Scene File |
| .sco | Disk Image | TotalRecovery Backup Image |
| .scp | Raster Image | ColoRIX Bitmap Graphic File |
| .scpcfg | Settings | SuperCard Project Configuration File |
| .scpt | Executable | AppleScript Script File |
| .scr | Executable | Script File |
| .scr | System | Windows Screensaver |
| .screenflow | Video | ScreenFlow Document |
| .screstorelog | Data | Spring Cleaning Restore Log |
| .scresults | Data | Spring Cleaning Results File |
| .script | Executable | Generic Script File |
| .scriv | Text | Scrivener Document |
| .scrivx | Text | Scrivener XML Document |
| .scs | Game | SimCity Societies Saved Game File |
| .scs | Game | Prism3D Game Data File |
| .sct | Text | FoxPro Form Memo |
| .sct | Executable | Windows Scriptlet |
| .sct | Raster Image | Scitex Continuous Tone File |
| .scu | Raster Image | ColoRIX Bitmap Image |
| .scv | Vector Image | ScanVec CASmate Sign File |
| .scw | Misc | Score Writer Document |
| .scw | Text | Movie Magic Screenwriter Document |
| .scx | Data | SuperCard Help Project |
| .scx | Game | Game Scenario File |
| .scx | Game | Microsoft Game Scenario File |
| .scx | Database | FoxPro Form |
| .scz | Data | SmartDraw Collection Package File |
| .sd | Audio | ESPS Sampled Data File |
| .sd | Audio | Sound Designer Audio File |
| .sd2 | Audio | Sound Designer II File |
| .sd2f | Audio | Sound Designer 2 File |
| .sda | Vector Image | StarOffice Drawing |
| .sdat | Audio | Nintendo DS Sound Data File |
| .sdb | Web | SocialDecks Blog File |
| .sdb | 3D Image | SAP2000 Model File |
| .sdb | Database | MonKey Office SQLite Database File |
| .sdb | Database | ServerBoss Database File |
| .sdb | System | Custom Application Compatibility Database |
| .sdb | Database | OpenOffice.org Base Database File |
| .sdc | Backup | Stardock Central Download Archive |
| .sdc | Spreadsheet | OpenOffice.org Calc Spreadsheet |
| .sdc | Compressed | Secure Download Cabinet |
| .sdd | Data | StarOffice Presentation |
| .sdef | Developer | AppleScript Dictionary Document |
| .sdf | Game | World in Conflict Game Map |
| .sdf | Database | SQL Server Compact Database File |
| .sdf | Data | Standard Data File |
| .sdf | GIS | Spatial Data Format File |
| .sdf | Data | Structure Data File |
| .sdg | CAD | Strater Project File |
| .sdi | Disk Image | Windows System Deployment Image |
| .sdii | Audio | Sound Designer 2 Audio File |
| .sdinstall | Data | Speckie Dictionary Installation File |
| .sdm | Text | StarOffice Mail Message |
| .sdm | GIS | Spatial Data Modeling Language File |
| .sdn | Compressed | Shareware Distributors Network File |
| .sdoc | Text | Satra Khmer Document |
| .sdoc | Encoded | Sealed Word Document |
| .sdp | Data | StarOffice Presentation File |
| .sdp | Data | Session Description Protocol File |
| .sdq | Data | SAS Data File |
| .sdr | Raster Image | SmartDraw Drawing |
| .sds | Audio | MIDI Sample Dump Standard File |
| .sds | Data | OpenOffice.org Chart |
| .sds | Data | SDS Apps Data File |
| .sdsk | Disk Image | SafeHouse Private Storage Volume |
| .sdt | Audio | Electronic Arts Sound Data File |
| .sdt | Game | Grand Theft Auto 3 Audio File |
| .sdt | Page Layout | SmartDraw Template File |
| .sdw | Text | StarOffice Writer Text Document |
| .sdw | GIS | MrSID World File |
| .sdx | Audio | Sample MIDI Dump Exchange |
| .sdz | Game | Spring Content Package |
| .sdz | Data | NCI Compressed Database |
| .sea | Compressed | Self-Extracting Archive |
| .seam | Web | Seam Framework Java Servlet File |
| .search-ms | Misc | Windows Saved Search File |
| .searchconnector-ms | System | Windows Search Connector File |
| .sec | Video | GuinXell Video File |
| .sec | Misc | PGP Secret Key Ring |
| .sed | Settings | IExpress Self Extraction Directive File |
| .sed | Developer | Sed Script |
| .seed | Executable | Linux Preseed File |
| .sef | Encoded | Encryptafile Signature File |
| .seg | Audio | Eragon Audio File |
| .sel | Data | LinkOne Selection List File |
| .sen | Data | SenTest Data File |
| .sen | Compressed | Scifer Internal Header Archive |
| .seo | Data | SEO Note File |
| .seplugin | Plugin | AppleScript Editor Plug-in |
| .seq | Video | NorPix StreamPix Sequence |
| .seq | Data | DNA Sequence Text File |
| .seq | Audio | PowerTracks Pro Audio Project File |
| .sequ | Settings | Adobe Acrobat Sequence File |
| .ser | Data | GeneMapper Project File |
| .ses | Audio | Audition Session File |
| .session | 3D Image | CATIA 4 Session File |
| .sesx | Audio | Adobe Audition Session File |
| .set | Settings | Settings File |
| .set | Settings | Document Library Property Set File |
| .settings | Game | Minecraft iConomy Plug-in Settings File |
| .settings | Settings | Visual Studio Settings File |
| .sew | CAD | Home Embroidery Format |
| .sf | Audio | IRCAM Sound File |
| .sf2 | Audio | SoundFont 2 Sound Bank |
| .sfap0 | Audio | Sound Forge Audio Proxy File |
| .sfb | Game | PlayStation 3 Disc Data File |
| .sfc | Raster Image | Motic Microscope Image |
| .sfc | Game | Creatures Saved Game |
| .sfc | Game | Super Nintendo ROM |
| .sfcache | System | ReadyBoost Cache File |
| .sfd | Font | Spline Font Database File |
| .sfd | Video | Sofdec Dreamcast Movie |
| .sff | Raster Image | Structured Fax File |
| .sff | Game | M.U.G.E.N. Sprite File |
| .sfk | Audio | Sound Forge Audio Peak File |
| .sfl | Audio | Sound Forge Sound Data File |
| .sfo | Settings | CuteFTP Search File |
| .sfo | Game | PSP Game Parameters File |
| .sfs | Compressed | Squashfs File Archive |
| .sfs | Audio | SFX Sample File |
| .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 |
| .sga | Game | Relic Entertainment Game Archive |
| .sgaa | Game | Aleph One Saved Game |
| .sgb | Game | Super Game Boy ROM File |
| .sgb | Game | Dawn of War Map File |
| .sgi | Raster Image | Silicon Graphics Image File |
| .sgm | Game | VisualBoyAdvance Saved Game |
| .sgm | Text | SGML File |
| .sgml | Data | Standard Generalized Markup Language File |
| .sgn | Data | Slax Boot File |
| .sgr | Game | SimCity 4 Graphics Rules File |
| .sgt | Settings | SPSS Chart Template |
| .sh | Compressed | Unix Shell Archive |
| .sh | Developer | Bash Shell Script |
| .sh2 | Game | Stronghold 2 Saved Game |
| .sh3d | 3D Image | Sweet Home 3D Design File |
| .sh3f | 3D Image | Sweet Home 3D Model Library |
| .sha256 | Misc | FileVerifier++ SHA-256 Hashes File |
| .shader | Game | Quake 3 Engine Shader File |
| .shar | Compressed | Unix Shar Archive |
| .shb | Executable | Windows Document Shortcut |
| .shc | Data | Adobe Photoshop Contours File |
| .shd | System | Windows Print Job Shadow File |
| .shg | Raster Image | Segmented Hyper-Graphic |
| .shh | Settings | Adobe Photoshop Shadow/Highlight Settings file |
| .shk | Compressed | ShrinkIt Archive |
| .shn | Audio | Shorten Compressed Audio File |
| .shortcut | Misc | Asutype Shortcut |
| .shp | GIS | ESRI Shapefile |
| .shp | 3D Image | Shapes File |
| .shpa | Game | Aleph One Shape File |
| .shr | Compressed | Unix Shell Archive File |
| .shs | Misc | Microsoft Scrap File |
| .shsh | System | iPhone/iPod Touch SHSH Blob File |
| .sht | Web | HTML File with Server Side Includes |
| .shtm | Web | HTML Server Side Include File |
| .shtml | Web | Server Side Include HTML File |
| .shv | Misc | Husqvarna Viking Embroidery File |
| .shw | Data | Corel Presentation |
| .shx | Misc | Motorola Flash Superfile |
| .shx | Data | Shapefile Index File |
| .shx | CAD | AutoCAD Compiled Shape File |
| .shy | Encoded | ShyFile Encrypted File |
| .si | 3D Image | Softimage Image File |
| .sib | Audio | Sibelius Score |
| .sid | Audio | SID Audio File |
| .sid | Audio | Commodore 64 Music File |
| .sid | Game | Steam Game Data Backup File |
| .sid | Raster Image | MrSID Image |
| .sidx | Data | StuffIt Archive Index File |
| .sif | Settings | Windows Setup Information File |
| .sig | Text | Signature File |
| .sig | Raster Image | Broderbund Sign File |
| .sii | Game | 18 Wheels of Steel: Haulin' Truck Definition File |
| .sim | Backup | Steam Game Backup Information File |
| .sim | Data | SAP Tutor File |
| .sim | Raster Image | Aurora Image |
| .simg | Disk Image | Synclavier Disk Image File |
| .sims2pack | Game | Downloaded Sims 2 Package File |
| .sims3pack | Game | The Sims 3 Package File |
| .sis | Backup | Steam Game Backup Information File |
| .sis | Database | Sisma Database File |
| .sis | Misc | Symbian Installation File |
| .sis.dm | Misc | Ovi Store DRM-Protected Application |
| .sisx | Misc | Symbian OS Installation File |
| .sisx.dm | Misc | Nokia Ovi Store DRM-Protected Application |
| .sit | Compressed | StuffIt Archive |
| .site | Web | GoLive Website Project File |
| .sitemap | Web | ASP.NET Site Map File |
| .sites2 | Web | iWeb Site Design Project |
| .sitx | Compressed | StuffIt X Archive |
| .sjava | Developer | Synchronous Java File |
| .sk1 | Vector Image | sK1 Vector Graphic File |
| .sk2 | Vector Image | ChemSketch Drawing |
| .skb | Backup | SketchUp Backup Document |
| .skc | Data | SideKick Card File |
| .sketch | Vector Image | Sketch Drawing |
| .skf | CAD | AutoSketch Drawing |
| .ski | Settings | Motorola Phone Skin File |
| .skim | Data | Skim Notes File |
| .skin | Settings | ASP.NET Skin File |
| .skin | Settings | InstallShield Skin File |
| .skindex | Misc | Mail Index File |
| .skitch | Raster Image | Skitch Image |
| .skl | 3D Image | Maya Skeleton File |
| .skm | Raster Image | SketchUp Materials File |
| .skn | Settings | Symbian OS Skin File |
| .skp | 3D Image | SketchUp Document |
| .skr | Misc | PGP Private Keyring |
| .skv | Data | XLANG Schedule Drawing File |
| .skv | Data | Semicolon Separated Values File |
| .skx | Data | XLANG Schedule File |
| .skz | Settings | SuperKaramba Theme |
| .sl | Settings | Software License File |
| .sla | Text | Scribus Document |
| .sla.gz | Text | Scribus Compressed Document |
| .slb | Misc | AutoCAD Slide Library |
| .sld | Raster Image | AutoCAD Slide File |
| .sldasm | CAD | SolidWorks Assembly File |
| .slddrt | Vector Image | SolidWorks Sheet File |
| .slddrw | CAD | SolidWorks Drawing File |
| .sldprt | CAD | SolidWorks Part File |
| .sldtm | Data | SDL Translation Memory File |
| .sle | Data | Sisulizer Package File |
| .slf | Misc | Symantec License File |
| .slk | Data | Symbolic Link File |
| .sll | Developer | Static Link Library |
| .sln | Developer | Visual Studio Solution File |
| .slp | Data | Sisulizer Project File |
| .sls | Text | Image Playlist |
| .slt | Settings | Mozilla User Profile Folder |
| .slupkg-ms | Misc | XrML Digital License Package |
| .sm | Game | StepMania Song File |
| .sma | Developer | AMX Mod Plugin Source File |
| .smc | Game | Super Nintendo Game ROM |
| .smd | 3D Image | Valve Studiomdl Data File |
| .smd | Game | Sega Mega Drive ROM |
| .smf | Audio | Standard MIDI File |
| .smf | Vector Image | Serif Metafile |
| .smf | Text | StarMath Formula File |
| .smi | Disk Image | Self-Mounting Disk Image |
| .smi | Video | SMIL Presentation |
| .smil | Video | SMIL Presentation File |
| .smk | Video | Smacker Compressed Movie File |
| .sml | Video | SMIL Slideshow Presentation |
| .smm | Executable | Ami Pro Macro |
| .smp | Audio | SampleVision Audio Sample Format |
| .smp | GIS | IDRISI Palette File |
| .smp | Raster Image | Xionics SMP Image |
| .smpd | Game | Sc2gears Mouse Print Data File |
| .smrd | Misc | Adobe InDesign Filter File |
| .sms | Game | Sega Master System ROM |
| .sms | Text | Exported SMS Text Message |
| .smt | Settings | Samsung Theme File |
| .smv | Video | VideoLink Mail Video File |
| .smwt | Misc | Adobe InDesign Filter |
| .smzip | Game | StepMania Package |
| .sn1 | Backup | Drive Snapshot First Differential Backup |
| .sn2 | Backup | Drive Snapshot Second Differential Backup |
| .sna | Backup | Drive Snapshot Primary Backup File |
| .snag | Data | SnagIt Capture File |
| .snapfireshow | Data | Corel SnapfireShow File |
| .snd | Audio | Macintosh Sound Resource |
| .snd | Audio | Akai MPC Sample |
| .snd | Audio | Sound File |
| .snda | Game | Aleph One Sound File |
| .sng | Audio | Korg Trinity Song File |
| .sng | Audio | MIDI Song File |
| .snippet | Developer | Visual Studio IntelliSense Code Snippet |
| .snk | Encoded | Strong Name Key File |
| .snm | Misc | Netscape Mail Index |
| .snp | Page Layout | Access Report Snapshot |
| .snt | Misc | Sticky Notes File |
| .so | Developer | Shared Library |
| .so-abi | Plugin | Cocoa AbiWord Plug-in |
| .so.0 | System | Unix Shared Library File |
| .sob | Raster Image | OpenOffice.org Impress Bimap Styles File |
| .sol | Settings | Flash Local Shared Object File |
| .solitairesave-ms | Game | Microsoft Solitaire Saved Game |
| .sonic | Data | DigitalMedia Project File |
| .sopt | Disk Image | Synclavier Optical Disk Image File |
| .sou | Audio | SBStudio II Sound File |
| .soundpack | Data | SoundPackager Sound Package |
| .sounds | Game | Quake 3 Engine Sound Definition File |
| .sow | Game | Descent ARJ Archive |
| .sp | Page Layout | SignPlot Traffic Sign File |
| .sp2 | Game | Super Ball 2 Level File |
| .sp45 | Data | SuperCard Player File |
| .sparc | Plugin | Skype Plugin Archive |
| .sparsebundle | Disk Image | Mac OS X Sparse Bundle |
| .sparseimage | Disk Image | Mac OS X Sparse Image |
| .spb | Data | Samsung Kies Phonebook File |
| .spb | Game | Flight Simulator Mission File |
| .spc | Web | Software Publisher Certificate File |
| .spc | Raster Image | Spectrum 512 Compressed Image |
| .spc | Game | SNES Soundtrack File |
| .spd | Encoded | Sealed Acrobat Document |
| .spd | Plugin | SPSS Custom Dialog File |
| .spdf | Encoded | Sealed PDF File |
| .spe | Raster Image | WinSpec CCD Capture File |
| .spe | Plugin | SPSS Extension |
| .spf | Settings | SlingPlayer Favorites File |
| .spf | Backup | ShadowProtect Full Backup File |
| .spfx | Settings | Squeeze Presets File |
| .spg | Backup | TCP Optimizer Backup File |
| .spi | Backup | ShadowProtect Incremental Backup File |
| .spidersolitairesave-ms | Game | Microsoft Spider Solitaire Saved Game |
| .spiff | Raster Image | Still Picture Interchange File Format |
| .spj | Settings | SPSS Production Job File |
| .spj | Raster Image | Microsoft ICE Panorama Project |
| .spk | Game | Deer Hunter Map File |
| .spk | Data | Bright Spark Document |
| .spk | Misc | Synology Package |
| .spl | System | Windows Print Spool File |
| .spl | Video | FutureSplash Animation |
| .spo | Game | Spore Saved Game |
| .spo | Data | SPSS Statistical Data Output File |
| .spp | Raster Image | Serif PhotoPlus Picture File |
| .sppack | Audio | SPPack Sound Sample |
| .spq | Database | SPSS Database Query File |
| .spr | Executable | FoxPro Generated Screen File |
| .spr | Raster Image | Half-Life Sprite File |
| .sprg | Audio | Synclavier Program File |
| .sprite | Game | SuperTux Sprite File |
| .sprite | Raster Image | Scratch Sprite File |
| .sps | Backup | SyncBack Settings File |
| .sps | Data | SPSS Program File |
| .sps | Game | Quake 3 Engine Speaker Definition File |
| .sps | Game | Sharkport PS2 Save File |
| .spt | Developer | Cypress Semiconductor Script |
| .spt | CAD | SpeedTree Tree Data File |
| .spt | Data | AQW Trainer File |
| .spt | Developer | ESPL Programming File |
| .spt | Compressed | TM File Packer Compressed Archive |
| .spu | Raster Image | Spectrum 512 Image |
| .spub | Data | Disc Cover File |
| .spv | Data | SPSS Output Document |
| .spx | Audio | Ogg Vorbis Speex File |
| .sq | Data | Sysquake Program |
| .sqb | Backup | SQL Backup SQL Server Backup File |
| .sqd | Data | SQ Data File |
| .sqfs | Disk Image | Squash FS Bootable File |
| .sql | Database | Structured Query Language Data |
| .sqlite | Database | SQLite Database File |
| .sqlite3 | Database | SQLite 3 Database File |
| .sqlitedb | Database | SQLite Database |
| .sqm | System | Service Quality Monitoring File |
| .sqm | Game | Operation Flashpoint Mission File |
| .sqr | Data | SQL Program File |
| .squashfs | Data | Squashfs File System File |
| .sqx | Compressed | SQX Archive |
| .sqz | Video | Squeeze Project File |
| .sr | Raster Image | Sun Raster Image File |
| .sr0 | Misc | SecuROM Analysis File |
| .sr2 | Raster Image | Sony RAW Image |
| .src | Developer | Source Code |
| .srep | Compressed | SuperREP Compressed File |
| .srf | Data | Surfer Project File |
| .srf | Settings | Steinberg Resource File |
| .srf | 3D Image | LightWave Surface File |
| .srf | Raster Image | Sony RAW Image |
| .srf | Web | Server Response File |
| .srm | Game | Super Nintendo ROM Save File |
| .srr | Backup | ReScene Metadata File |
| .srs | Settings | Outlook Send/Receive Settings File |
| .srt | Video | SubRip Subtitle File |
| .srw | Raster Image | Samsung RAW Image |
| .ssa | Game | Children of the Nile Campaign File |
| .ssa | Text | Sub Station Alpha Subtitle File |
| .ssc | Data | Celestia Solar System Catalog File |
| .ssc | Developer | SourceSafe Status File |
| .ssc | Misc | Stellarium Script |
| .ssd | Misc | WindowBlinds Skin File List |
| .sseq | Audio | Synclavier Sequence File |
| .sseq | Audio | Nintendo DS Sound File |
| .ssf | GIS | Trimble Standard Storage Format File |
| .ssi | Developer | Adobe Dreamweaver Server Side Include File |
| .ssl | Settings | Sunlight ScanLibrary File |
| .ssl2 | Settings | Sunlight ScanLibrary 2 File |
| .sslf | Misc | HLSW Shared Server List File |
| .ssm | Video | Standard Streaming Metafile |
| .ssnd | Audio | Synclavier Sound File |
| .ssp | Data | Screensaver Producer Project File |
| .ssp | Web | Scala Server Page |
| .sss | Settings | WindowBlinds Substyle File |
| .sst | Misc | Serialized Certificate Store File |
| .sst | Game | Children of the Nile Textures File |
| .ssw | Misc | Sony Ericsson Firmware File |
| .st | Disk Image | Atari ST Disk Image |
| .st45 | Data | SuperCard Trial Project File |
| .sta | Data | Adobe Photoshop Match Color Image Statistics File |
| .sta | Data | ABAQUS Status File |
| .sta | Game | MAME Saved State File |
| .stap | Audio | Soundtrack Pro Audio Project File |
| .startupinfo | Settings | E-Prime 2.0 Startup Info File |
| .stb | Settings | AutoCAD Plot Style Table File |
| .stc | Web | Contribute Connection Key File |
| .stc | Data | Celestia Star Catalog File |
| .stc | Spreadsheet | StarOffice Calc Spreadsheet Template |
| .stc | 3D Image | Shade to Manga Studio File |
| .std | Misc | CD/DVD Label Template |
| .std | Vector Image | OpenOffice.org Drawing Template |
| .stdl | Data | Swift To-Do List Database |
| .ste | Raster Image | Samsung IPOLIS Image File |
| .ste | Settings | Dreamweaver Site Settings File |
| .steamstart | Game | Valve Steam Start File |
| .step | 3D Image | STEP 3D Model |
| .stf | Data | Exchange 2000 Server Temporary File |
| .stf | Settings | Microsoft Setup Table File |
| .stg | Backup | ActiveSync Backup File |
| .sth | Misc | Lotus Domino Stash File |
| .sti | Data | StarOffice Presentation Template |
| .stk | Data | Stickfigure Animator File |
| .stl | CAD | Stereolithography File |
| .stl | Game | SuperTux Level File |
| .stl | Web | Certificate Trust List |
| .stl | Data | Fireworks Style Library |
| .stl | Video | Spruce Technologies Subtitle File |
| .stm | Data | Exchange Streaming Media File |
| .stm | Web | SSI Web Page |
| .stm | Audio | Scream Tracker 2 Module |
| .stmb | Misc | Synclavier Timbre File |
| .stml | Web | SSI HTML File |
| .sto | 3D Image | PRO100 3D Interior Design Project |
| .story | Text | Storyist Document |
| .storyisttheme | Settings | Storyist Application Theme File |
| .storymill | Misc | StoryMill Project File |
| .stp | 3D Image | STEP 3D CAD File |
| .stp | Web | SharePoint Template |
| .stp | Data | Analysis Studio Project Information File |
| .stproj | Data | Samsung Theme Document |
| .str | Game | BFME2 Strings File |
| .str | Data | dBASE Structure List Object File |
| .str | Video | PlayStation Video Stream |
| .str | System | Windows Screensaver File |
| .strings | Text | Text Strings File |
| .stsg | Game | SuperTux Saved Game |
| .stt | Data | Kaspersky Statistics File |
| .stt | GIS | Streets & Trips Map Template |
| .stt | Settings | SPSS Table Template |
| .sttpl | Data | Samsung Theme Showcase File |
| .stu | Data | Pinnacle Studio Project File |
| .stw | Text | StarOffice Document Template |
| .stw | Data | STATISTICA Workbook |
| .stwm | Game | SuperTux World Map File |
| .stx | Audio | Scream Tracker Music Interface Kit File |
| .stx | Video | Pinnacle Studio Project File |
| .sty | Data | NewsMaker Story File |
| .sty | Audio | Yamaha/Korg Keyboard Style |
| .sty | Text | LaTeX Style |
| .sty | Audio | Band-in-a-Box Styles File |
| .sty | Settings | Aegisub Subtitle Styles File |
| .styk | Data | Stykz Stick Figure |
| .stykz | Data | Stykz Animation |
| .style | Settings | SketchUp Style |
| .style | GIS | ArcGIS Style Manager File |
| .sub | Game | SubTerra Level File |
| .sub | Text | Subtitle File |
| .suck | Web | SiteSucker Website File |
| .sud | Developer | Super Project Analyzer File |
| .sud | Game | Sudoku Puzzle File |
| .suf | Encoded | Ccrypt Encrypted File |
| .sui | Data | StarSplatter User Interface File |
| .suit | Font | Macintosh Font Suitcase |
| .sum | Misc | Garmin Checksum File |
| .sumo | Raster Image | Sumo Paint Image |
| .sun | Raster Image | Sun Raster Graphic File |
| .suniff | Raster Image | Sun TAAC Image |
| .suo | Developer | Visual Studio Solution User Options File |
| .sup | Raster Image | Subtitle Bitmap File |
| .sup | Developer | Super Project Definition File |
| .sv2i | Backup | Symantec System Index File |
| .sv5 | Game | Chris Sawyer's Locomotion Saved Game |
| .sv5 | Game | BigJig Saved Puzzle |
| .sv6 | Game | RollerCoaster Tycoon 2 Saved Game |
| .sva | Raster Image | Manga Browser Comic File |
| .svc | Web | WCF Web Service File |
| .svd | Audio | Roland Patch File |
| .svd | Data | Scanning Vibrometer Data File |
| .svd | CAD | SolidView Design File |
| .sve | Game | Simutrans Saved Game |
| .svf | Vector Image | Simple Vector Format Graphic |
| .svf | Data | Serial Vector Format File |
| .svg | Vector Image | Scalable Vector Graphics File |
| .svgz | Vector Image | Compressed SVG File |
| .svi | Video | Samsung Video File |
| .svn-base | Developer | Subversion Base File |
| .svn-work | Misc | Subversion Cache File |
| .svr | Web | Compressed Virtual World |
| .svs | Game | Game Boy Advance Saved State File |
| .svw | Data | SpecView File |
| .svx | Audio | 8SVX Sound File |
| .svx | GIS | Survex Cavern Data File |
| .sw | Audio | Signed Word Audio File |
| .sw2 | Settings | Softwrap License File |
| .swa | Audio | Shockwave Audio |
| .swc | Developer | Flex Components Archive |
| .swc | Game | Super Nintendo Wild Card ROM File |
| .swd | Developer | Flash Debug File |
| .swf | Video | Shockwave Flash Movie |
| .swi | Video | SWiSH Project File |
| .switch | Encoded | Switch Package |
| .swj | Misc | SolidWorks Journal File |
| .swk | Data | StudyWorks Save File |
| .swm | Disk Image | Split Windows Imaging Format File |
| .swp | Misc | Vi Swap File |
| .swp | System | Swap File |
| .swt | Video | Flash Generator Template |
| .swv | Game | Microsoft Sidewinder Game Voice Settings File |
| .swz | Web | Adobe Flash Player Cache File |
| .sxc | Spreadsheet | StarOffice Calc Spreadsheet |
| .sxd | Vector Image | StarOffice Drawing |
| .sxd | GIS | ArcScene Document |
| .sxg | Text | OpenOffice.org Master Document |
| .sxi | Data | StarOffice Impress Presentation |
| .sxm | Misc | StarMath Formula |
| .sxw | Text | StarOffice Writer Document |
| .sy3 | Data | Harvard Graphics Symbol File |
| .syb | Game | Syberia Game Data File |
| .syh | Audio | Synchomatic Instrument |
| .sylk | Data | Microsoft Symbolic Link File |
| .sym | Developer | Symbols File |
| .syn | Audio | SimSynth Document |
| .syn | Audio | Synergy On Air Audio File |
| .sys | System | Motorola Driver File |
| .sys | System | Windows System File |
| .system | Game | Vega Strike Virtual System File |
| .syw | Audio | Yamaha SY99/SY85 Audio File |
| .syx | Audio | MIDI System Exclusive Message |
| .sy_ | Compressed | Compressed SYS File |
| .sz | Settings | Winamp Classic Skin Download |
| .szs | Data | Wii Game Data File |
