| bl | Binary Linework TIFF Image |
| bld | MegaPaint Image |
| blend | Blender Data |
| blkrt | Block Artist Image |
| blp | Blizzard Texture Data |
| blp | Blazing Paddles Bitmap |
| bm | X Bitmap Image |
| bmc | Embroidery Image |
| bmc | Remote Desktop Connection Bitmap Cache |
| bmf | BMF Bitmap |
| bmg | Berts Coloring Image |
| bmp | Windows Bitmap Image |
| bmpf | Windows Bitmap Image |
| bms | Playback Bitmap Sequence |
| bmx | Siemens Mobile Animation |
| bo1 | Magnavox Odyssey 1 Emulator Overlay Image |
| bob | Bob Raytracer Image |
| bp | Binary Picture TIFF Image |
| bpg | Better Portable Graphics Image |
| bpr | AAA Logo Image |
| brk | Brooktrout 301 Fax Image |
| brt | Brooktrout 301 Fax Image |
| bs | C64 Printfox/Pagefox Bitmap Image |
| bsq | ArcInfo Band Sequential Image |
| bsv | BSAVE Image |
| bti | Nintendo GameCube Game Texture |
| btn | JustButtons Button Image |
| btpc | BTPC Encoded Bitmap |
| bum | Poser Bump Maps Data |
| bw | SGI Black and White Image |
| b_w | ImageLab Image |
| c1p | Capture One Preview Data |
| c2b | Casio ClassPad II Animation |
| c2p | Casio ClassPad II Picture |
| c4 | Edmics Image |