| wbp | Webshots Photo Pack |
| wbz | Webshots Image |
| webp | WebP Image |
| wgi | WildGame Innovations Digital Camera Photo |
| wic | J Wavelet Image Codec Bitmap |
| wif | CoffeCup Web Image Studio Document |
| wig | Commodore 64 Wigmore Artist 64 Image |
| wjp | WildTangent JPEG Image |
| wki | Lexmark Photo Center Document |
| wlm | CompW Bitmap |
| wmf | Windows Metafile |
| wmp | Windows Media HD Photo |
| wnd | Atari 8-bit Blazing Paddles Window Image |
| wpb | OpenCanvas 1.0 Image |
| wpe | OpenCanvas 1.1 Event |
| wpg | Corel WordPerfect Graphics Metafile |
| wsq | Wavelet-packet Scalar Quantization Bitmap |
| x | X11 Server Import Image |
| x2d | IWork X2D Graphics Format Data |
| x3f | Sigma RAW Image |
| xar | Xara Drawing |
| xb | XBin Image |
| xbm | X Bitmap Image |
| xc | ImageMagick Canvas Image |
| xcf | Gimp Image |
| xcfbz2 | Gimp BZip2 Compressed XCF |
| xep | XenoDream Graphics Data |
| xface | X-Face Image |
| xga | Atari Falcon XGA Image |
| xif | Pagis Pro Scanned Image |
| xifs | PixInsight XIFS Data |
| xim | XImage Bitmap |
| ximg | Atari ST Extended GEM Bit Image |
| ximg | IDV Image XML |
| xisf | PixInsight XISF Data |
| 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 |
| xsp | XBMC Smart Playlist |
| xtf | eXtended Triton Format File |
| xtx | Xbox 360 XTX Texture Data |
| xvc | MuPAD Uncompressed VCam Graphic |
| xvz | MuPAD Compressed VCam Graphic |
| xwd | X Window Dump |
| xws | Xara Web Designer Graphic |
| xyze | Radiance Map Data |
| yal | Arts and Letters Clipart Library |
| ybm | Bennet Yee Face Bitmap |
| ylc | YouiDraw Logo Creator Image |
| ypc | Whypic Image |
| yuv | Abekas YUV Image |
| zan | BlueEyes Animation |
| zbm | Zlib Compressed Bitmap |
| zbr | Zoner Zebra Metafile |
| zeiss | Zeiss CSLM Bitmap |
| zgf | Landmark Zycor Graphics File |
| zgm | Zenographics Image |
| zif | Zoomorama Image Format File |
| zim | NEC PC-98 Kid98 Image |
| zmf | Zoner Callisto Metafile |
| zmi | ZAP Meta Image |
| zp1 | ZX81 ZXpaintyONE Bitmap |
| zpic | Adobe After Effects ZPIC Image |
| zpic | AutoDesk Softimage ZPIC Image |
| zsy | Zerene Stacker Image |
| zt | Mental Ray Shadow Map |
| ztl | ZBrush ZTool File |
| zvi | Zeiss AxioVision Image |
| zxm | ZX-Paintbrush Map Image |
| zxn | PhotoEncrypt Encrypted Photo |
| zxp | ZX Spectrum ZX-Paintbrush Bitmap |