S File Extensions
File extensions that start with the letter S
| Extension | File Type | File Description |
| .s3m | Audio | ScreamTracker 3 Sound File |
| .sa9 | Plugin | Hue and Cry Photoshop Plug-In |
| .saf | Audio | Secure Audio File |
| .sam | Text | Lotus Word Pro / Ami Pro Document |
| .sar | Image | Saracen Paint Graphic |
| .sav | Game | Saved Game |
| .sbf | Data | SmartBroker Data |
| .sca | Data | Norton AntiVirus Scan File |
| .scd | Misc | TurboTax Schedule Description |
| .scf | System | Windows Explorer Command |
| .scg | Image | ColorRIX Bitmap Graphic |
| .sci | Image | ColorRIX Bitmap Graphic |
| .scm | Video | ScreenCam Recording |
| .scp | Image | ColorRIX Bitmap Graphic |
| .scr | Executable | Script File |
| .scr | System | Windows Screensaver |
| .sct | Image | Scitex Continuous Tone File |
| .scu | Image | ColorRIX Bitmap Graphic |
| .sd2 | Audio | Sound Designer II File |
| .sdb | System | Custom Application Compatibility Database |
| .sdc | Data | StarOffice Spreadsheet |
| .sdd | Misc | StarOffice Presentation |
| .sdm | Image | Spatial Data Modeling Language |
| .sdn | Compressed | Shareware Distributors Network File |
| .sdq | Data | SAS Data File |
| .sdr | Image | SmartDraw Drawing |
| .sdw | Text | StarOffice Text Document |
| .sdx | Audio | Sample MIDI Dump Exchange |
| .sea | Compressed | Self-Extracting Archive |
| .set | Misc | Settings File |
| .sew | Misc | Home Embroidery Format |
| .sf | Audio | Sound File |
| .sfk | Audio | Sound Forge Audio |
| .sfv | Misc | Simple File Verification File |
| .sfw | Image | Seattle FilmWorks Image |
| .sgi | Image | Silicon Graphics Image |
| .sgml | Data | Standard Generalized Markup Language File |
| .shar | Compressed | Unix Shar Archive |
| .shb | Executable | Windows Shortcut into a Document |
| .shg | Image | Segmented Hyper-Graphic |
| .shk | Compressed | ShrinkIt Archive |
| .shp | Image | Shapes File |
| .shs | Executable | Shell Scrap Object File |
| .sht | Web | HTML File with Server Side Includes |
| .shtm | Web | HTML File that uses Server Side Includes |
| .shtml | Web | HTML File that uses Server Side Includes |
| .shw | Misc | Corel Presentation |
| .sib | Audio | Sibelius Score |
| .sid | Image | MrSID Image |
| .sig | Text | Signature File |
| .sim | Image | Aurora Image |
| .sis | Misc | Symbian Installation File |
| .sit | Compressed | Stuffit Archive |
| .site | Web | Adobe GoLive Website Project |
| .sitx | Compressed | Stuffit X Archive |
| .smc | Game | Super Nintendo Game ROM |
| .smf | Audio | Standard MIDI File |
| .smi | Disk | ShrinkWrap Disk Image |
| .smil | Video | Synchronized Multimedia Integration Language |
| .smm | Text | Lotus Word Pro / Ami Pro Macro |
| .sms | Game | Sega Master System ROM |
| .smv | Video | VideoLink Mail Video |
| .snd | Audio | Sound Clip |
| .sng | Audio | MIDI Song File |
| .snm | Misc | Netscape Mail Index |
| .so | Developer | Shared Library |
| .spc | Image | Spectrum 512 Compressed Image |
| .spd | Misc | Sealed Acrobat Document |
| .spdf | Misc | Sealed PDF |
| .spiff | Image | Still Picture Interchange File Format |
| .spl | Video | FutureSplash Animation |
| .spo | Data | SPSS Statistical Data Output File |
| .sps | Data | SPSS Statistical Data Document |
| .spt | Developer | ESPL Programming File |
| .spu | Image | Spectrum 512 Image |
| .sql | Data | Structured Query Language Data |
| .sqz | Compressed | Squeezed Video File |
| .src | Developer | Source Code |
| .srt | Text | Subtitle Format |
| .stc | Data | StarOffice Spreadsheet Template |
| .std | Image | StarOffice Drawing Template |
| .sti | Misc | StarOffice Presentation Template |
| .stw | Text | StarOffice Text Document Template |
| .sub | Text | Subtitle File |
| .suit | Font | Font Suitcase |
| .suniff | Image | Sun TAAC Graphic |
| .sup | Image | Subtitle Bitmap File |
| .svg | Image | Scalable Vector Graphics |
| .svi | Video | Samsung Video File |
| .svr | Web | Compressed Virtual World |
| .svx | Audio | 8SVX Sound File |
| .sw | Audio | Signed Word Audio File |
| .swa | Audio | ShockWave Audio |
| .swf | Video | Macromedia Flash Movie |
| .swp | System | Swap File |
| .sxc | Data | StarOffice Spreadsheet |
| .sxd | Image | StarOffice Drawing |
| .sxi | Misc | StarOffice Presentation |
| .sxm | Misc | StarOffice Math File |
| .sxw | Text | StarOffice Text Document |
| .sys | System | System File |