| ximg | Atari ST Extended GEM Bit Image |
| xjt | Gimp Jpeg-Tar File |
| xlp | Atari 8-bit XL-Paint Image |
| xmp | Adobe XMP Metadata |
| xos | Xaos Tools Bitmap Image |
| xpif | Extended Processed Image File |
| xpm | X Pixmap |
| xqd | Seiko Microscope Image |
| xqf | Seiko Microscope Image |
| xsp | XBMC Smart Playlist |
| xtf | eXtended Triton Format File |
| xtx | Xbox 360 XTX Texture Data |
| xv | Khoros Visualization Image |
| xvc | MuPAD Uncompressed VCam Graphic |
| xvz | MuPAD Compressed VCam Graphic |
| xwd | X Window Dump |
| xws | Xara Web Designer Graphic |
| xyze | Radiance Map Data |
| y8 | RAW Y8 Image |
| yal | Arts and Letters Clipart Library |
| ybm | Bennet Yee Face Bitmap |
| yjk | MSX2+ Screen 12 Bitmap Image |
| ypc | Whypic Image |
| yuv | Abekas YUV Image |
| zan | BlueEyes Animation |
| zbm | Zlib Compressed Bitmap |
| zbr | Zoner Zebra Metafile |
| zgf | Landmark Zycor Graphics File |
| zgm | Zenographics Image |
| zif | Zoomorama Image Format File |
