What is the WOLF file format?
A .wolf file - almost always named Data.wolf - is a proprietary encrypted archive produced by WOLF RPG Editor (also called Woditor), a Japanese game-creation tool developed by SmokingWOLF (SilverSecond). It bundles all game resources into a single distributable container.
Inside Data.wolf the editor packs audio files (.ogg), graphics (.png, .jpg), map data, and internal database files. The archive is encrypted at publish time to discourage resource extraction; the exact encryption algorithm is not publicly documented.
The game engine reads Data.wolf at runtime without extracting its contents. Community modders and fan-translation teams rely on the third-party tool arc_conv (by Regalis) to extract and repack the archive for modification work.
WOLF RPG Editor is a freeware role-playing-game authoring tool popular for Japanese indie (doujin) games, with many titles later translated to English by fan groups. The paid variant, WOLF RPG Editor 3 PRO, adds extra features but uses the same archive format. The editor is Windows-only; no macOS or Linux version exists.
Security & safety
RISK: LOWData.wolf is a passive game-data archive, not an executable. It cannot run on its own. Risk is the same as downloading any game from an unknown source - verify the game's origin. The wolf e-book variant is also passive data.
Format details
in a nutshell- HanLin eBook Document - Proprietary e-book format for HanLin E Ink reader devices running Linux; Cool Reader was associated with this use.
- Printer Driver File - Rare use for storing bitmap printer driver data compatible with Word/Excel/PowerPoint printers.
Programs that open WOLF files
Windows2 apps
Wolf RPG Editor (Woditor)
Free The authoring tool that creates .wolf archives. Run the game's own .exe (which uses this engine) to play; the editor can open the project folder before packaging.
arc_conv (community extractor)
Open-source Community tool to unpack/extract Data.wolf archives for modding or translation. Run: arc_conv Data.wolf Technical details
deep spec| File encoding | Binary (proprietary, encrypted) |
| Byte order | Little-endian |
| Encryption | Yes - encrypted by WOLF RPG Editor at publish time; algorithm not publicly documented |
| Typical file name | Data.wolf (one archive per game distribution) |
| Typical file size | 10 MB - 500 MB (varies by game asset volume) |
| Packed content types | Audio (.ogg), images (.png, .jpg), map data, and internal game database files |
| Format versioning | Internal format varies between WOLF RPG Editor 2.x and 3.x releases |
| Magic bytes | None publicly documented |
| MIME type | application/octet-stream |
| Operating system | Windows only |
| Community extraction tool | arc_conv by Regalis - third-party tool used for fan translation and modding |
| Runtime usage | Read directly by the Wolf RPG runtime engine at game launch without prior extraction |
| Released | 2007 (WOLF RPG Editor initial release) |
| Latest version | WOLF RPG Editor 3 PRO (circa 2022) |
| Specification | www.silversecond.com |
WOLF conversions
Community Q&A
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