| j | JPEG Bitmap Image |
| j2c | JPEG 2000 Code-stream Data |
| j2k | JPEG 2000 Code-stream Data |
| j2p | JPIP Indexed File |
| j6i | Ricoh Digital Camera Image |
| jas | Paint Shop Pro Compressed Image |
| jb2 | JBIG2 Bitmap Image |
| jbg | JBIG Bitmap Image |
| jbig | JBIG Bitmap Image |
| jbig | JBIG2 Bitmap Image |
| jbig2 | JBIG2 Bitmap Image |
| jbmp | JAmes OS Bitmap Image |
| jbr | Corel Paint Shop Pro Brush |
| jdr | JpgfDraw Drawing Binary |
| jff | JPEG Bitmap Image |
| jfi | JPEG Bitmap Image |
| jfif | JPEG Bitmap Image |
| jfx | J2 jConnect Fax File |
| jgp | Atari 8-bit Jet Graphics Planner Image |
| jif | JPEG Bitmap Image |
| jiff | JPEG Bitmap Image |
| jig | Puzzle Image |
| jip | JIP Analysis Toolkit Image |
| jj | C64 Doodle Compressed Image |
| jla | VisualPro BMP Image |
| jls | Lossless JPEG Image |
| jmg | Laservision Graphic |
| jng | Jpeg Network Graphics |
| jp2 | JPEG 2000 Bitmap Image |
| jp4 | Elphel Project JP4 File |
| jpc | JPEG 2000 Code-stream Data |
| jpd | Joint PhotoDefiner Image |
| jpe | JPEG Bitmap Image |
| jpeg | JPEG Bitmap Image |
| jpeg2000 | JPEG 2000 Bitmap Image |
| jpf | JPEG 2000 Bitmap Image |
| jpg | JPEG Bitmap Image |
| jpg!d | PxHere JPEG Picture |
| jpg-large | Google Chrome Saved Twitter Picture |
| jpg2 | JPEG 2000 Bitmap Image |
| jpg_large | Google Chrome Saved Twitter Picture |
| jpg_medium | Twitter JPEG Image |
| jpg_orig | Twitter JPEG Image |
| jpg_small | Twitter JPEG Image |
| jpg_thumb | Twitter JPEG Image |
| jpig | JPiG Image |
| jpm | JPEG 2000 JPM Image |
| jpng | JPNG Image |
| jps | Stereo JPEG Image |
| jpt | JPEG 2000 Code Stream Image |
| jpx | JPEG 2000 Bitmap Image |
| jtf | JPEG Bitmap Image |
| jtif | JPEG Tagged Interchange Bitmap |
| jut | JutVision Scene |
| jxl | JPEG XL Coded Image |
| jxr | JPEG XR Image |
| k25 | Kodak DC25 RAW Image |
| kap | NOAA Nautical Chart Image |
| kc2 | Kodak DCS200 RAW Image |
| kcf | KISekae Set System Bitmap |
| kdc | Kodak Photo-Enhancer Data |
| kdk | Kodak Proprietary Decimated TIFF |
| kic | Kodak Compressed Image |
| kid | Atari ST Fullscreen Construction Kit Image |
| kid2 | Kid Pix 2 Drawing |
| kids | Kid Pix Drawing |
| kif | Kt Interchange File Format Bitmap |
| kiff | Kt Interchange File Format Bitmap |
| kla | Koala Paint Image |
| kmg | Sega Dreamcast Uncompressed Image |
| koa | Koala Paint Image |
| kodak | Kodak Photo CD |
| kpg | KPT Goo Graphic |
| kpr | Atari 8-bit Compressed Animation Data |
| kps | IBM Kips Bitmap |
| kqp | Konica Camera Image |
| kra | Krita Image |
| kraw | Mac OS X Kernel Loadable RAW Image |
| krita | Krita Image |
| kro | Kolor Raw Image |
| krz | Krita Compressed Image |
| kss | Atari 8-bit KSS-Paint Image |
| kuva | Kuvio Matrix Camera RAW Image |
| lbm | Deluxe Paint Bitmap |
| lce | ZX Spectrum 128 Laced Screen Bitmap |
| lda | LaserData Fax Image |
| ldm | Atari 8-bit Ludek Maker Image |
| ldm | VolumeViz Multi-Resolution Volume |
| leo | Atari 8-bit Larka Editor Object |
| lerc | LERC Image |
| lfp | Lytro Lightfield Camera RAW Image |
| lfr | Lytro Illum Camera RAW Image |
| lgo | OS/2 Warp Boot Logo |
| lif | Homeworld Texture |
| lif | Leica Image File |
| lim | Laboratory Imaging LIM Image |
| linea | Linea Sketch Drawing |
| lip | Clip Studio Old Paint |
| livp | iPhone Live Photo |
| lj | HP LaserJet Vector Image |
