| Extension | Summary |
|---|
| .S | Source Code File |
| .S00 | ZipSplitter Part 1 File |
| .S01 | ZipSplitter Part 2 File |
| .S02 | ZipSplitter Part 3 File |
| .S09 | ZipSplitter Part 10 File |
| .S10 | Brasfoot Saved Game File |
| .S16 | Digital Voice Recorder Audio File |
| .S19 | Motorola S19 File Record |
| .S2A | SEAL2 Application |
| .S2ARR | SynthFont2 Arrangement File |
| .S2E | SWF to EXE Converter Project File |
| .S2M | Stronghold 2 Map File |
| .S2MH | StarCraft 2 Map Header File |
| .S2ML | StarCraft 2 Map Localization File |
| .S2MV | StarCraft 2 Map Preview File |
| .S2QH | StarCraft 2 Localization Header File |
| .S2QL | StarCraft 2 Unit Localization File |
| .S2Z | Heroes of Newerth Game Data File |
| .S3G | MakerBot 3D Print File |
| .S3I | Scream Tracker 3 Instrument |
| .S3M | ScreamTracker 3 Module |
| .S3S | Samorost 3 Game Save File |
| .S3Z | Compressed Scream Tracker 3 Module |
| .S4D | Scratch for Discord Project |
| .S4M | SWAT 4 Map File |
| .S5X | Heritage of Kings: The Settlers Map File |
| .S7Z | Mac OS X 7-Zip File |
| .S85 | Sabre Airline Solutions Chart |
| .SA1 | Game Boy Emulator Save File |
| .SA9 | Hue and Cry Photoshop Plug-in |
| .SAB | ACIS SAB Model File |
| .SABL | Call of Duty: Black Ops II Sound Archive |
| .SAD | Black & White Audio File |
| .SAF | Street Atlas USA Map File |
| .SAFARIEXTZ | Apple Safari Extension Package |
| .SAFE | SIGLock Encrypted File |
| .SAFENOTEBACKUP | Safe Note Backup File |
| .SAFETEXT | SafeText File |
| .SAH | SETI@home Data File |
| .SAI | PaintTool SAI Image |
| .SAI2 | PaintTool SAI Version 2 Image |
| .SALL | SimplySync Backup Configuration File |
| .SAM | SAM Studio Project |
| .SAM07 | SAM 2007 Package |
| .SAMI | Grand Theft Auto San Andres Mod Installer File |
| .SAMP | Nintendo ADPCM Sound Sample File |
| .SAMPLE | Godot Engine Wav Audio File |
| .SAN | Smush Animation File |
| .SAP | Atari SAP Music File |
| .SAR | Service Archive File |
| .SARC | Sead ARChived Resource File |
| .SAS | SAS Program File |
| .SAS7BDAT | SAS Dataset File |
| .SASBX | Space Agency Sandbox File |
| .SASS | Syntactically Awesome StyleSheets File |
| .SAT | ACIS SAT 3D Model File |
| .SAV | Parallels Desktop Saved State Image File |
| .SAVE | The Sims 4 Save File |
| .SAVEDDECK | Nokia Saved Web Page |
| .SAVEDSEARCH | Spotlight Saved Search |
| .SAVEDSTATE | Virtual Router Saved State File |
| .SAVER | Mac OS X Screen Saver |
| .SB | Small Basic Source Code File |
| .SB2 | Scratch 2.0 Project File |
| .SB3 | Scratch 3.0 Project File |
| .SBB | Office Accounting Company Backup File |
| .SBC | Office Accounting Company Shortcut File |
| .SBD | DNASTAR SeqBuilder File |
| .SBF | Android System File |
| .SBFRES | Compressed Breath of the Wild Model File |
| .SBG | SBaGen Binaural Beat File |
| .SBGF | Grapher Settings File |
| .SBI | Sound Blaster Instrument |
| .SBK | Multimedia ToolBook System Book |
| .SBM | Space Engineers Mod File |
| .SBN | Cisco IP Phone Firmware File |
| .SBP | OpenSBP CNC Program File |
| .SBPROJ | OpenGL Shader Builder Project |
| .SBQ | Superbase QuickReports File |
| .SBR | Visual Studio Source Browser Intermediate File |
| .SBRES | Small Basic LitDev Resource File |
| .SBS | Secure Backup System File |
| .SBSAR | Substance Archive |
| .SBT | SBT Subtitle File |
| .SBU | Samsung Backup File |
| .SBV | YouTube Captions File |
| .SBW | US Treasury Savings Bonds Wizard File |
| .SBX | ScratchX Project File |
| .SBZ | ShowBiz Project File |
| .SC | Space Engine Script |
| .SC2 | World of Tanks Blitz Model File |
| .SC2ARCHIVE | Blizzard StarCraft 2 Archive File |
| .SC2ASSETS | Blizzard StarCraft 2 Assets File |
| .SC2BANK | StarCraft 2 Bank File |
| .SC2DATA | Blizzard StarCraft 2 Data File |
| .SC2LOCALE | Blizzard StarCraft 2 Localization File |
| .SC2MA | StarCraft 2 Map Data File |
| .SC2MAP | Blizzard StarCraft 2 Map File |
| .SC2MOD | Blizzard StarCraft 2 Modification File |
| .SC2REPLAY | Blizzard StarCraft 2 Replay File |
| .SC2SAVE | Blizzard StarCraft 2 Saved Game |
| .SC2SCENE | StarCraft 2 Cut Scene File |
| .SC3 | SimCity 3000 City File |
| .SC4 | RollerCoaster Tycoon Scenario File |
| .SC45 | SuperCard Project File |
| .SC4DESC | SimCity 4 summary File |
| .SC4LOT | SimCity 4 Lot File |
| .SC4MODEL | SimCity 4 Model File |
| .SC5 | Chris Sawyer's Locomotion Scenario File |
| .SC6 | RollerCoaster Tycoon 2 Scenario File |
| .SCA | Scala Script File |
| .SCACFG | SuperCard Application Configuration File |
| .SCAD | OpenSCAD Script |
| .SCALA | Scala Source Code File |
| .SCAP | EFI Firmware File |
| .SCAR | SCAR Script |
| .SCB | Scrambls Encrypted File |
| .SCC | SourceSafe Source Code Control File |
| .SCD | Data Rescue Saved Scan File |
| .SCDOC | SpaceClaim Document |
| .SCE | Scilab Script |
| .SCEA | Aleph One Map File |
| .SCENE | Antibody Level File |
| .SCEXCLUDB | Spring Cleaning Exclusions File |
| .SCF | Windows Explorer Command |
| .SCG | ColoRIX Image File |
| .SCGC | myPM SCG Classic Data File |
| .SCGP | myPM SCG Pro Data File |
| .SCGS | myPM SCG Starter Data File |
| .SCH | Strater Scheme File |
| .SCHEM | Minecraft Schematic |
| .SCHEMAS | GConf Schema Definition File |
| .SCHEMATIC | Minecraft Schematic File |
| .SCI | ColoRIX Graphics Image |
| .SCL | Sibelius Chord Diagram Library |
| .SCLVL | Scritter's Nest Data File |
| .SCM | Scheme Source Code File |
| .SCML | Spriter Configuration XML File |
| .SCN | Godot Engine Binary Scene File |
| .SCN0 | Wii Texture Animation File |
| .SCO | TotalRecovery Backup Image |
| .SCONF | Script Settings File |
| .SCP | ColoRIX Bitmap Graphic File |
| .SCPCFG | SuperCard Project Configuration File |
| .SCPRESETS | Snap Converter Presets File |
| .SCPT | AppleScript Script File |
| .SCPTD | AppleScript Script Bundle |
| .SCR | Windows Screensaver |
| .SCRATCH | Scratch Project File |
| .SCREENFLOW | ScreenFlow Document |
| .SCRESTORELOG | Spring Cleaning Restore Log |
| .SCRESULTS | Spring Cleaning Results File |
| .SCRIBE | VideoScribe Project |
| .SCRIPT | Generic Script File |
| .SCRIPTLIBRARY | Painter Script Library |
| .SCRIPTSUITE | AppleScript Script Suite File |
| .SCRIPTTERMINOLOGY | AppleScript Script Terminology File |
| .SCRIV | Scrivener Document |
| .SCRIVX | Scrivener XML Document |
| .SCS | Prism3D Game Data File |
| .SCS11 | Show Cue System Cue File |
| .SCSF | SEE Finance Data File |
| .SCSKIN | Survivalcraft Skin File |
| .SCSS | Sass Cascading Style Sheet |
| .SCT | Windows Scriptlet |
| .SCU | ColoRIX Bitmap Image |
| .SCUT4 | Easy Cut Studio Project |
| .SCV | ScanVec CASmate Sign File |
| .SCW | Score Writer Document |
| .SCWORLD | Survivalcraft World File |
| .SCX | Game Scenario File |
| .SCZ | SmartDraw Collection Package File |
| .SD | Sound Designer Audio File |
| .SD2 | Sound Designer II File |
| .SD2F | Sound Designer 2 File |
| .SD7 | Spring Content Package |
| .SDA | StarMoney User Database Archive |
| .SDAT | Nintendo DS Sound Data File |
| .SDB | Custom Application Compatibility Database |
| .SDC | Stardock Central Download Archive |
| .SDD | StarOffice Presentation |
| .SDEF | AppleScript Dictionary Document |
| .SDF | Spatial Data Format File |
| .SDG | Strater Project File |
| .SDI | Windows System Deployment Image |
| .SDII | Sound Designer 2 Audio File |
| .SDINSTALL | Speckie Dictionary Installation File |
| .SDL | Service summary Language File |
| .SDLPPX | SDL Trados Studio Project Package |
| .SDLPROJ | SDL Trados Studio Project |
| .SDLRPX | SDL Trados Studio Return Package |
| .SDLTPL | SDL Trados Studio Project Template |
| .SDLXLIFF | SDL Trados XLIFF Localization File |
| .SDM | Spatial Data Modeling Language File |
| .SDN | Shareware Distributors Network File |
| .SDO | Signed Document |
| .SDOC | Samsung Notes Note |
| .SDOCX | Samsung Notes Note |
| .SDP | StarOffice Presentation File |
| .SDQ | SAS Data File |
| .SDR | Dell Support File |
| .SDS | MIDI Sample Dump Standard File |
| .SDSK | SafeHouse Private Storage Volume |
| .SDT | Siemens Desktop Theme File |
| .SDTID | SecurID Soft Token File |
| .SDV | Studio DV Project File |
| .SDW | MrSID World File |
| .SDX | Kivuto Secure Download Manager File |
| .SDY | StarMoney User Database File |
| .SDZ | Spring Content Package |
| .SE | Shuttle Document |
| .SE1 | Swiss Ephemeris Data File |
| .SEA | Self-Extracting Archive |
| .SEAM | Seam Framework Java Servlet File |
| .SEARCH-MS | Windows Saved Search File |
| .SEARCHCONNECTOR-MS | Windows Search Connector File |
| .SEB | Safe Exam Browser Configuration File |
| .SEC | PGP Secret Key Ring |
| .SECURE | Septium Secure Document |
| .SECURITYSETTINGS | Alpha Five Security Settings File |
| .SED | Sed Script |
| .SEDPRJ | Slideshow Studio Elements Project |
| .SEED | Linux Preseed File |
| .SEESTYLE | Coda Style Sheet File |
| .SEF | Password Manager Container File |
| .SEG | Eragon Audio File |
| .SEGY | SEG-Y Data File |
| .SEL | LinkOne Selection List File |
| .SELECTIONPORTFOLIOLIBRARY | Painter Selection Portfolio Library |
| .SEM | Alpha Five Set Data Dictionary Memo File |
| .SEN | Scifer Internal Header Archive |
| .SEO | SEO Note File |
| .SEP | Separated Image File |
| .SEPLUGIN | AppleScript Editor Plug-in |
| .SEQ | NorPix StreamPix Sequence |
| .SEQU | Adobe Acrobat Sequence File |
| .SER | Astronomical Capture Video File |
| .SERVER | MySQL Server Script |
| .SERVICE | Systemd Service Unit File |
| .SES | Audition Session File |
| .SESSION | CATIA 4 Session File |
| .SESX | Adobe Audition Session File |
| .SET | Alpha Five Set Data Dictionary File |
| .SETTINGCONTENT-MS | Windows Settings File |
| .SETTINGS | Visual Studio Settings File |
| .SETUP | CryENGINE Character Setup File |
| .SEW | Home Embroidery Format |
| .SEX | Alpha Five Set Data Dictionary Index File |
| .SF | Minecraft JAR Signature File |
| .SF2 | SoundFont 2 Sound Bank |
| .SFAP0 | Sound Forge Pro Audio Proxy File |
| .SFAR | Mass Effect 3 DLC File |
| .SFB | PlayStation 3 Disc Data File |
| .SFC | Creatures Saved Game |
| .SFCACHE | ReadyBoost Cache File |
| .SFD | Spline Font Database File |
| .SFERA | Sfera 360° File |
| .SFF | M.U.G.E.N Sprite File |
| .SFG | Synfig Studio Compressed Project |
| .SFI | SafeFolder Encrypted File |
| .SFK | Sound Forge Pro Audio Peak File |
| .SFL | Sound Forge Pro Sound Data File |
| .SFO | CuteFTP Search File |
| .SFP | Soft Font Printer File |
| .SFPACK | Packed SoundFont File |
| .SFS | Squashfs File Archive |
| .SFT | Microsoft App-V Sequencer File |
| .SFV | Simple File Verification File |
| .SFVIDCAP | Sonic Foundry Video Capture File |
| .SFW | Seattle FilmWorks Image |
| .SFX | Windows Self-extracting Archive |
| .SFZ | SFZ Sample Definition File |
| .SG | SG-1000 Game ROM File |
| .SG0 | Humongous Entertainment Game Save File |
| .SGA | Relic Entertainment Game Archive |
| .SGAA | Aleph One Saved Game |
| .SGB | Super Game Boy ROM File |
| .SGD | GeneSnap Image File |
| .SGF | Smart Game Format File |
| .SGI | Silicon Graphics Image File |
| .SGM | Starpoint Gemini 2 Mod Package |
| .SGML | Standard Generalized Markup Language File |
| .SGN | Signet Bureau DRM File |
| .SGP | MP3 Audio Mixer Sound Group Project |
| .SGPBPR | Baltie Program |
| .SGPBPRJ | Baltie Project |
| .SGPSC | Baltie Scene |
| .SGR | SimCity 4 Graphics Rules File |
| .SGT | SPSS Chart Template |
| .SGY | SEG-Y Data File |
| .SGZ | SigzaLock Encrypted File |
| .SH | Bash Shell Script |
| .SH2 | Stronghold 2 Saved Game |
| .SH3D | Sweet Home 3D Design File |
| .SH3F | Sweet Home 3D Model Library |
| .SHA | GodMode9 SHA SysNAND Crosscheck File |
| .SHA1 | SHA-1 Hash File |
| .SHA256 | FileVerifier++ SHA-256 Hashes File |
| .SHA512 | SHA 512 Hash File |
| .SHADER | Quake 3 Engine Shader File |
| .SHAR | Unix Shar Archive |
| .SHB | Windows Document Shortcut |
| .SHBIN | Nintendo 3DS Shader Binary File |
| .SHC | Adobe Photoshop Contours File |
| .SHD | Windows Print Job Shadow File |
| .SHFT | Shift Work Calendar Data File |
| .SHG | Segmented Hyper-Graphic |
| .SHH | Adobe Photoshop Shadow/Highlight Settings file |
| .SHIPWORLD | Starbound Player Ship File |
| .SHK | ShrinkIt Archive |
| .SHN | Shorten Compressed Audio File |
| .SHORTCUT | Asutype Shortcut |
| .SHOW | Thinkfree Office NEO Show Document |
| .SHP | ESRI Shapefile |
| .SHPA | Aleph One Shape File |
| .SHPROJ | Visual Studio Code Sharing App Project |
| .SHR | Unix Shell Archive File |
| .SHS | Microsoft Scrap File |
| .SHSH | iPhone/iPod Touch SHSH Blob File |
| .SHSH2 | iOS SHSH Blob |
| .SHT | HTML File with Server Side Includes |
| .SHTM | HTML Server Side Include File |
| .SHTML | Server Side Include HTML File |
| .SHV | Husqvarna Viking Embroidery File |
| .SHW | MagicQ Show File |
| .SHX | Motorola Flash Superfile |
| .SHY | ShyFile Encrypted File |
| .SI | Sound Interleave Archive |
| .SIA | Sia Metadata File |
| .SIB | Sibelius Score |
| .SID | Steam Game Data Backup File |
| .SIDB | iTunes Authorization Data File |
| .SIDD | iTunes Authorization Data File |
| .SIDN | iTunes Authorization Data File |
| .SIDX | StuffIt Archive Index File |
| .SIF | Synfig Studio Project |
| .SIFZ | Synfig Studio Compressed Project |
| .SIG | QuickTac SIG File |
| .SIGNATURE | e-Filing Digital Signature File |
| .SII | 18 Wheels of Steel: Haulin' Truck Definition File |
| .SIM | Steam Game Backup Information File |
| .SIMG | Synclavier Disk Image File |
| .SIMP | Software Ideas Modeler Project |
| .SIMS2PACK | Downloaded Sims 2 Package File |
| .SIMS3 | The Sims 3 Game Save File |
| .SIMS3.BACKUP | The Sims 3 Game Save Backup File |
| .SIMS3.BAD | The Sims 3 Failed Game Save File |
| .SIMS3PACK | The Sims 3 Package File |
| .SIN | Sony Xperia Firmware File |
| .SINF | iOS Application Archive File |
| .SIS | Symbian Installation File |
| .SIS.DM | Ovi Store DRM-Protected Application |
| .SISX | Symbian OS Installation File |
| .SISX.DM | Nokia Ovi Store DRM-Protected Application |
| .SIT | StuffIt Archive |
| .SITE | GoLive Website Project File |
| .SITEMAP | ASP.NET Site Map File |
| .SITES | iWeb Website Design Project |
| .SITES2 | iWeb Website Design Project |
| .SITX | StuffIt X Archive |
| .SIV | Silicon Imaging Video File |
| .SJAVA | Synchronous Java File |
| .SJD | Scrapbook Factory Journal File |
| .SJPG | Sealed JPG File |
| .SJR | ScratchJr Project File |
| .SK | Safari History Index File |
| .SK1 | sK1 Vector Graphic File |
| .SK2 | ChemSketch Drawing |
| .SKB | SketchUp Backup Document |
| .SKBA | SketchBook Pro Animation File |
| .SKC | SideKick Card File |
| .SKCARD | Starfish Sidekick Card File |
| .SKD | Max Payne Skin Data File |
| .SKEIN | Skein XML File |
| .SKETCH | Sketch Drawing |
| .SKETCHPAD | Sketchpad Drawing File |
| .SKF | AutoSketch Drawing |
| .SKI | Motorola Phone Skin File |
| .SKIM | Skim Notes File |
| .SKIN | InstallShield Skin File |
| .SKINDEX | Mail Index File |
| .SKITCH | Skitch Image |
| .SKL | Maya Skeleton File |
| .SKM | SketchUp Materials File |
| .SKN | Symbian OS Skin File |
| .SKP | SketchUp Document |
| .SKR | PGP Private Keyring |
| .SKSE | Skyrim Script Extender Save File |
| .SKV | Semicolon Separated Values File |
| .SKX | XLANG Schedule File |
| .SKYPECHATSTYLE | Chat Style File |
| .SKYPEEMOTICONSET | Skype Emoticon Set File |
| .SKZ | SuperKaramba Theme |
| .SL | Software License File |
| .SLA | Scribus Document |
| .SLA.GZ | Scribus Compressed Document |
| .SLB | AutoCAD Slide Library |
| .SLC | Sokoban Level Collection File |
| .SLD | Styled Layer Descriptor File |
| .SLDASM | SolidWorks Assembly File |
| .SLDDRT | SolidWorks Sheet File |
| .SLDDRW | SolidWorks Drawing File |
| .SLDPRT | SolidWorks Part File |
| .SLDTM | SDL Translation Memory File |
| .SLE | Steganos Safe Encrypted Drive |
| .SLF | Symantec License File |
| .SLI | OMSI Spline Configuration File |
| .SLK | Symbolic Link File |
| .SLL | Static Link Library |
| .SLN | Visual Studio Solution File |
| .SLOGO | StarLogo Project File |
| .SLOGT | StarLogo Project Template |
| .SLP | Stormworks Mod File |
| .SLS | Image Playlist |
| .SLST | Game Data File |
| .SLT | Mozilla User Profile Folder |
| .SLTNG | StarLogo TNG Project File |
| .SLUPKG-MS | XrML Digital License Package |
| .SLX | SpectraLayers Pro Project |
| .SM | StepMania Song File |
| .SMA | AMX Mod Plugin Source File |
| .SMALI | Android Smali Assembly Language File |
| .SMB | Autodesk Shape Manager Binary File |
| .SMBL | Super Meat Boy Level File |
| .SMC | Super Nintendo Game ROM |
| .SMD | Sega Mega Drive ROM |
| .SMDH | 3DS Game Metadata |
| .SME | Samsung Mobile Backup File |
| .SMENT | StarMade Entity File |
| .SMF | SkinMagic Toolkit File |
| .SMG | SolidWorks Composer File |
| .SMI | Self-Mounting Disk Image |
| .SMIL | SMIL Presentation File |
| .SMK | Smacker Compressed Movie File |
| .SML | ARC/INFO Simple Macro Language File |
| .SMM | Map Manager Schema File |
| .SMMSTORE | Local Mind Map Store File |
| .SMMX | SimpleMind Mind Map File |
| .SMO | Sumotori Dreams Arena File |
| .SMOD | Stonehearth Mod File |
| .SMP | ScrapeMap File |
| .SMPD | Sc2gears Mouse Print Data File |
| .SMPF | Sprite Monkey Project |
| .SMPKG | SmartMusic Package File |
| .SMPX | SmartMusic Accompaniment File |
| .SMRAILROADSSAVEDGAME | Sid Meier's Railroads! Saved Game |
| .SMRD | Adobe InDesign Filter File |
| .SMS | Sega Master System ROM |
| .SMSEC | StarMade Sector File |
| .SMSKIN | StarMade Skin File |
| .SMT | Samsung Theme File |
| .SMV | VideoLink Mail Video File |
| .SMWT | Adobe InDesign Filter |
| .SMX | SmartMusic XML File |
| .SMZ | SMath Studio Compressed Document |
| .SMZIP | StepMania Package |
| .SN1 | Drive Snapshot First Differential Backup |
| .SN2 | Drive Snapshot Second Differential Backup |
| .SNA | Drive Snapshot Primary Backup File |
| .SNAG | SnagIt Capture File |
| .SNAGITSTAMPS | Snagit Stamp Archive |
| .SNAGPROJ | Snagit Project File |
| .SNAGSTYLES | Snagit Style Archive |
| .SNAP | Snap Application Package |
| .SNAPFIRESHOW | Corel SnapfireShow File |
| .SNAPPY | Snappy Compressed File |
| .SNAPSHOT | VMware ThinApp Snapshot File |
| .SNB | S Note File |
| .SND | M.U.G.E.N Sound File |
| .SNDA | Aleph One Sound File |
| .SNETLVL | Super Mario Maker.NET Level |
| .SNF | Starry Night Pro Document |
| .SNG | MIDI Song File |
| .SNGX | ChordWizard Song |
| .SNIPPET | Visual Studio IntelliSense Code Snippet |
| .SNK | Strong Name Key File |
| .SNM | Netscape Mail Index |
| .SNO | Starry Night Pro Data File |
| .SNP | Access Report Snapshot |
| .SNS | Save-N-Sync Project File |
| .SNSF | Super NES Sound Format File |
| .SNT | Sticky Notes File |
| .SNX | PISnoop Workspace File |
| .SNZ | Snappy Compressed File |
| .SO | Shared Library |
| .SO-ABI | Cocoa AbiWord Plug-in |
| .SO.0 | Unix Shared Library File |
| .SOB | OpenOffice.org Impress Bitmap Styles File |
| .SOD | Spear of Destiny Data File |
| .SOE | Star Wars: Shadows of the Empire Save File |
| .SOEPSX | Player Studio Viewer Item File |
| .SOL | Solidity Script |
| .SOLITAIRESAVE-MS | Microsoft Solitaire Saved Game |
| .SON | Beam Software SIFF Audio File |
| .SONG | AudioSauna Song File |
| .SONGDATA | jOeSU Level Data |
| .SONIC | DigitalMedia Project File |
| .SOPT | Synclavier Optical Disk Image File |
| .SOR | Standard OTDR Record File |
| .SOU | SBStudio II Sound File |
| .SOUNDPACK | SoundPackager Sound Package |
| .SOUNDS | Quake 3 Engine Sound Definition File |
| .SOUNDSCRIPT | Rigs of Rods Sound Script File |
| .SOW | Descent ARJ Archive |
| .SP | SignPlot Traffic Sign File |
| .SP2 | Super Ball 2 Level File |
| .SP3 | NGS SP3 File |
| .SP4 | SuperCard 4 Player Project |
| .SP45 | SuperCard Player File |
| .SPA | Spotify Application |
| .SPANISHER | Spanisher Word File |
| .SPARC | Skype Plugin Archive |
| .SPARKLE | Sparkle Website Project |
| .SPARSEBUNDLE | Mac OS X Sparse Bundle |
| .SPARSEFS | BlueStacks Data Folder |
| .SPARSEIMAGE | Mac OS X Sparse Image |
| .SPB | Flight Simulator Mission File |
| .SPC | Software Publisher Certificate File |
| .SPD | Form·Z Suspended Render File |
| .SPDF | Sealed PDF File |
| .SPE | SPSS Extension |
| .SPEC | RPM Specification File |
| .SPECCY | Speccy Snapshot |
| .SPF | ShadowProtect Full Backup File |
| .SPFX | Squeeze Presets File |
| .SPG | TCP Optimizer Backup File |
| .SPH | MikuMikuDance Sphere Mapping File |
| .SPI | ShadowProtect Incremental Backup File |
| .SPIDERSOLITAIRESAVE-MS | Microsoft Spider Solitaire Saved Game |
| .SPIFF | Still Picture Interchange File Format |
| .SPJ | SPSS Production Job File |
| .SPK | Synology Package |
| .SPL | Splunk Application Package |
| .SPL7 | sPlan 7 Schematic Diagram File |
| .SPLANE | Simple Planes Plane File |
| .SPLIT | Archiver Split File |
| .SPM | Salt Package Manager Formula Package |
| .SPO | Spore Saved Game |
| .SPP | Substance Painter Project |
| .SPPACK | SPPack Sound Sample |
| .SPQ | SPSS Database Query File |
| .SPR | FoxPro Generated Screen File |
| .SPRG | Synclavier Program File |
| .SPRITE | SuperTux Sprite File |
| .SPRITE2 | Scratch 2.0 Sprite File |
| .SPRITE3 | Scratch 3.0 Sprite File |
| .SPS | SyncBack Settings File |
| .SPT | Cypress Semiconductor Script |
| .SPU | Spectrum 512 Image |
| .SPUB | Swift Publisher Document |
| .SPV | SPSS Output Document |
| .SPVCHAIN | MultiCoin Wallet File |
| .SPX | Pfaff Stitch Pattern File |
| .SQ | Sysquake Program |
| .SQB | SQL Backup SQL Server Backup File |
| .SQD | Configuration Settings File |
| .SQF | ArmA Script File |
| .SQFS | Squash FS Bootable File |
| .SQL | Structured Query Language Data File |
| .SQLITE | SQLite Database File |
| .SQLITE3 | SQLite 3 Database File |
| .SQLITEDB | SQLite Database |
| .SQLPROJ | Visual Studio SQL Server Project |
| .SQM | Service Quality Monitoring File |
| .SQR | SQL Program File |
| .SQUASHFS | Squashfs File System File |
| .SQX | SQX Archive |
| .SQZ | The Master Genealogist Backup Project |
| .SR | Sega Genesis Collection Archive |
| .SR0 | SecuROM Analysis File |
| .SR2 | Sony RAW Image |
| .SR4 | AMD Ryzen Wraith Prism RGB Profile |
| .SRB | Sonic Robo Blast 2 Data File |
| .SRC | Source Code |
| .SRC.RPM | Red Hat Package Manager Source File |
| .SRD | Sage Report Data File |
| .SREP | SuperREP Compressed File |
| .SRF | Samsung Smart TV Recording File |
| .SRG | Ketron Single Registration File |
| .SRK | Sub Rosa Client File |
| .SRL | OpenSSL Security Certificate Serial Number |
| .SRM | Super Nintendo ROM Save File |
| .SRR | ReScene Metadata File |
| .SRS | Outlook Send/Receive Settings File |
| .SRT | SubRip Subtitle File |
| .SRT0 | Wii Texture Animation File |
| .SRW | Samsung RAW Image |
| .SS | SilverStripe Source Code File |
| .SSA | Children of the Nile Campaign File |
| .SSC | Stellarium Script |
| .SSCS | Saropa Smart Copy Script |
| .SSD | WindowBlinds Skin File List |
| .SSEQ | Synclavier Sequence File |
| .SSF | Trimble Standard Storage Format File |
| .SSFREC | Super Smash Flash 2 Recording File |
| .SSFSAV | Super Smash Flash Saved Game File |
| .SSG | Sonic Robo Blast 2 Saved Game File |
| .SSI | Adobe Dreamweaver Server Side Include File |
| .SSII | ProReveal Data File |
| .SSIS | ProReveal Settings File |
| .SSK | SmartSketch 95 Document |
| .SSL | Sunlight ScanLibrary File |
| .SSL2 | Sunlight ScanLibrary 2 File |
| .SSLF | HLSW Shared Server List File |
| .SSM | Sound Clip Archive |
| .SSND | Synclavier Sound File |
| .SSP | Scala Server Page |
| .SSPQ | STOP SSPQ Ransomware Encrypted File |
| .SSS | WindowBlinds Substyle File |
| .SST | Serialized Certificate Store File |
| .SSV | Seavus Secure Project File |
| .SSW | Sony Ericsson Firmware File |
| .ST | Atari ST Disk Image |
| .ST3 | Star 3 MIDI Karaoke File |
| .ST4 | SuperCard Trial Project File |
| .ST45 | SuperCard Trial Project File |
| .STA | MAME Saved State File |
| .STAGE | Pokémon Type Wild Stage Data File |
| .STAP | Soundtrack Pro Audio Project File |
| .STARTUPINFO | E-Prime 2.0 Startup Info File |
| .STATE | RetroArch Game Save State |
| .STATS | FreeSurfer Statistics File |
| .STB | AutoCAD Plot Style Table File |
| .STC | Siemens Theme File |
| .STD | CD/DVD Label Template |
| .STDL | Swift To-Do List Database |
| .STE | Dreamweaver Site Settings File |
| .STEAMSTART | Valve Steam Start File |
| .STENCYL | Stencyl Game File |
| .STEP | STEP 3D Model |
| .STEX | Godot Engine StreamTexture File |
| .STF | Microsoft Setup Table File |
| .STFX | SampleTank Effects Settings File |
| .STG | ActiveSync Backup File |
| .STH | Lotus Domino Stash File |
| .STI | SampleTank User Preset Data File |
| .STIP | SampleTank User Preset Instrument |
| .STIX | Structured Threat Information eXpression File |
| .STK | Power Vision Stock File |
| .STL | Certificate Trust List |
| .STM | SSI Web Page |
| .STMB | Synclavier Timbre File |
| .STML | SSI HTML File |
| .STN | Genuine Fractals Image |
| .STO | PRO100 3D Interior Design Project |
| .STOP | STOP Ransomware Encrypted File |
| .STORMREPLAY | Heroes of the Storm Replay File |
| .STORY | Storyist Document |
| .STORYBOARD | Interface Builder Storyboard Document |
| .STORYISTTHEME | Storyist Application Theme File |
| .STORYMILL | StoryMill Project File |
| .STP | SharePoint Template |
| .STPROJ | iAd Producer Project |
| .STR | Windows Screensaver File |
| .STRINGS | Text Strings File |
| .STRM | Stream Location File |
| .STS | DuoS DSEMU Saved State File |
| .STSG | SuperTux Saved Game |
| .STSKIN | Steam Skin File |
| .STT | SPSS Table Template |
| .STTPL | Samsung Theme Showcase File |
| .STU | Pinnacle Studio Project File |
| .STUDIO | Silhouette Studio Document |
| .STUDIO3 | Silhouette Studio Version 3 Document |
| .STW | SampleTank User Preset Data File |
| .STWM | SuperTux World Map File |
| .STX | Pinnacle Studio Project File |
| .STXT | Sealed Text File |
| .STY | Aegisub Subtitle Styles File |
| .STYK | Stykz Stick Figure |
| .STYKZ | Stykz Animation |
| .STYLE | SketchUp Style |
| .STYPE | Call of Duty Texture File |
| .STYX | ChordWizard Style |
| .SUA | Special Use Airspace File |
| .SUB | CloneCD Subchannel File |
| .SUBLIME-BUILD | Sublime Text Build File |
| .SUBLIME-KEYMAP | Sublime Text Keymap File |
| .SUBLIME-MENU | Sublime Text Menu File |
| .SUBLIME-OPTIONS | Sublime Text Options File |
| .SUBLIME-PACKAGE | Sublime Text Package File |
| .SUBLIME-PROJECT | Sublime Text Project File |
| .SUBLIME-SESSION | Sublime Text Session File |
| .SUBLIME-SETTINGS | Sublime Text Settings File |
| .SUBLIME-SNIPPET | Sublime Text Snippet File |
| .SUBLIME-THEME | Sublime Text Theme File |
| .SUBLIME-WORKSPACE | Sublime Text Workspace File |
| .SUB_LOC | Submachine Universe Location |
| .SUCK | SiteSucker Website File |
| .SUD | Super Project Analyzer File |
| .SUF | Ccrypt Encrypted File |
| .SUGAR | Espresso Plug-in |
| .SUI | StarSplatter User Interface File |
| .SUIT | Macintosh Font Suitcase |
| .SUM | Garmin Checksum File |
| .SUMO | Sumo Paint Image |
| .SUMOCFG | SUMO Configuration File |
| .SUN | Sun Raster Graphic File |
| .SUNIFF | Sun TAAC Image |
| .SUNVOX | SunVox Project File |
| .SUO | Visual Studio Solution User Options File |
| .SUP | Super Project Definition File |
| .SUPP | iOS Application Archive File |
| .SV | SystemVerilog Source Code File |
| .SV$ | AutoCAD Automated Backup File |
| .SV2I | Symantec System Index File |
| .SV4 | RollerCoaster Tycoon Saved Game |
| .SV5 | Chris Sawyer's Locomotion Saved Game |
| .SV6 | RollerCoaster Tycoon 2 Saved Game |
| .SVA | Manga Browser Comic File |
| .SVC | WCF Web Service File |
| .SVD | SolidView Design File |
| .SVE | Carmageddon: TDR 2000 Saved Game |
| .SVELTE | Svelte Source Code File |
| .SVF | Simple Vector Format Graphic |
| .SVG | Saved Game File |
| .SVGZ | Compressed SVG File |
| .SVH | SystemVerilog Source Code Header File |
| .SVI | Samsung Video File |
| .SVM | StarView Metafile |
| .SVN-BASE | Subversion Base File |
| .SVN-WORK | Subversion Cache File |
| .SVP | Subsurface Viewer Project |
| .SVQ | Roland Sequencer File |
| .SVR | Compressed Virtual World |
| .SVS | Need for Speed: World Vinyl Setup |
| .SVSLIDE | Sakura VisionTek Slide Image |
| .SVT | Torchlight Saved Game File |
| .SVW | SpecView File |
| .SVX | Survex Cavern Data File |
| .SW | Signed Word Audio File |
| .SW2 | Softwrap License File |
| .SW3 | WinWedge Configuration File |
| .SWA | Shockwave Audio |
| .SWAV | Nintendo DS Audio File |
| .SWC | Flex Components Archive |
| .SWD | Flash Debug File |
| .SWF | Shockwave Flash Movie |
| .SWI | SWiSH Project File |
| .SWIDTAG | SWID Tag File |
| .SWIFT | Swift Source Code File |
| .SWITCH | Switch Package |
| .SWJ | SolidWorks Journal File |
| .SWK | StudyWorks Save File |
| .SWM | Split Windows Imaging Format File |
| .SWP | Vi Swap File |
| .SWT | Flash Generator Template |
| .SWV | Microsoft Sidewinder Game Voice Settings File |
| .SWW | Anno Saved Game |
| .SWZ | Adobe Flash Player Cache File |
| .SX | SimplexNumerica Data File |
| .SXC | StarOffice Calc Spreadsheet |
| .SXCU | ShareX Custom Uploader |
| .SXD | ArcScene Document |
| .SXG | Apache OpenOffice Master Document |
| .SXI | StarOffice Impress Presentation |
| .SXIE | ShareX Image Effect File |
| .SXLS | Sealed Microsoft Excel Spreadsheet |
| .SXM | StarMath Formula |
| .SXML | Sealed XML File |
| .SXT | Propellerhead Reason NN-XT Patch File |
| .SXW | StarOffice Writer Document |
| .SY | Simplexety Data File |
| .SY3 | Harvard Graphics Symbol File |
| .SYB | Syberia Game Data File |
| .SYH | Synchomatic Instrument |
| .SYLK | Microsoft Symbolic Link File |
| .SYM | Symbols File |
| .SYN | TextPad Syntax File |
| .SYNW-PROJ | SynWrite Project |
| .SYS | Motorola Driver File |
| .SYS-RESERVED-RW-BITMAP.GROW | Pioneer DVD Recorder Dummy File |
| .SYSTEM | Vega Strike Virtual System File |
| .SYW | Yamaha SY99/SY85 Audio File |
| .SYX | MIDI System Exclusive Message |
| .SY_ | Compressed SYS File |
| .SZ | Winamp Classic Skin Download |
| .SZA | HiCAD Drawing File |
| .SZS | GameCube Data File |