Deark is a portable command-line utility that can decode certain types of files, and either convert them to a more-modern or more-readable format, or extract embedded files from them. It also has an option (-d) to display detailed information about a file’s contents and metadata. It’s free and open source.
The download package includes source code, and a Windows 64-bit (x64) binary, in the “x64” directory. Windows users may need to install a utility that supports .tar.gz format, such as 7-Zip.
For bug reports and feature suggestions, please use the issue tracker at GitHub. If you don’t want to make a GitHub account, you can use email.
Some of the file formats supported (in one way or another) by Deark are listed here. See formats.txt for a complete list.
Raster graphics: Acorn Sprite · Amiga icon / NewIcons / GlowIcons · AMOS sprite/icon/picture bank (ABK) · ANI (Windows animated cursor) · ANIM (IFF-ANIM) · BLOAD/BSAVE · BMP · ColoRIX · Comic Chat (.avb, .bgb) · Dr. Halo PIC / CUT · EPOC MBM / Sketch / AIF · FLI/FLC · GEM Bit Image · GIF · GRABBER · Graphic Workshop EXE · ICO / CUR (Windows icon/cursor) · Icon Heaven · ILBM (IFF image) · Mac icon (icns) · MacPaint · Mah Jongg (N. Anderson) tile set · Microsoft Paint · Nokia Phone image formats (NGG, NLM, NOL, NPM, NSL) · OS/2 Boot Logo · OS/2 Icon / Pointer / Bitmap array · PaintShop Pro Browser Cache (pspbrwse.jbf) · Palm OS Bitmap (BitmapType) · Palm OS ImageViewer · PCPaint PIC / CLP · PCX · PPM / PNM / etc. · PSD · Psion PIC · REKO Cardset · Spectrum 512 · TGA · TI-83/89/92/etc. calculator pictures · TIFF / Exif · X-Face · XWD
ANSI art and character graphics: AcidDraw COM · ANSI Art · ArtWorx ADF · Laughing Dog COM · TheDraw COM · XBIN
Compression, archives, disk images: ADF (Amiga) · AppleDouble/AppleSingle · ARC / Spark · ArcFS · ARJ · BACKUP (MS-DOS) · BinHex (HQX) · Compress (Unix) · cpio · D64 and T64 · Disk Express · DMS · GRASP GL · gzip · HFS · IMA/FAT · InstallShield Z · ISO 9660 and High Sierra · LBR · LHA/LHarc · LoadDskF/SaveDskF · MacBinary · MS Compress/Expand · NuFX · OS/2 PACK · Pack (Unix) · PackDir · PackIt · RPM · StuffIt · Tar · ZIP · Zoo
Fonts: CPI · EVAfont COM · FON / FNT (Windows font) · FONTEDIT COM · Font Mania COM · GEM bitmap font · PCF · PSF
Executable compression: DIET · EXEPACK · LZEXE · PKLITE · Spacemaker
Executable text: Asc2Com · DOC2COM · MAKEREAD · SHOW · TextLife · TXT2COM
Miscellaneous: CCX (Corel) · DS_Store · Encapsulated PostScript · EXE · HLP · JPEG · JPEG 2000 · Mac resource · Microsoft Compound File / OLE2 / Thumbs.db · MMFW resource · MP3 / ID3 · Ogg · Palm OS PDB and PRC · PICT (Macintosh) · Psion APP / IMG / OPA / OPO · SIS (EPOC/Symbian installer) · WMF / EMF · WMV / WMA / ASF · WRI (MS Write)