Click the "Select File" button above, and choose your DOI file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert DOI to another file type
To convert DOI Archives to another format, you need FitGirl Repacks Installer or other Compressed software.
Convert a file to DOI
To convert other file formats to the "Game Data Archive" file type, you need software like FitGirl Repacks Installer or a similar tool.
About DOI files
The .doi file is a specialized compressed archive primarily used to store optional game data. These files are typically created by the popular game repacker FitGirl Repacks using customized variants of the open-source FreeArc compression algorithm. Users need to convert or extract these files because the .doi format is proprietary in its implementation. It is designed solely for maximum file size reduction and requires massive amounts of RAM and CPU power to decompress. The main disadvantage of this format is its total lack of native system support. Standard archive utilities like WinRAR or 7-Zip cannot open it. If a game installation crashes, the data inside the archive remains completely trapped. The best target formats for a .doi file are standard archives like ZIP, 7Z, or TAR. Converting to these universally supported formats makes the internal game files, language packs, or Yuzu emulator assets easily accessible to any operating system without requiring the original setup executable. Be aware that converting or repackaging will result in a significantly larger file size because standard formats cannot match the aggressive compression of FreeArc. Because this is a closed, heavily customized archive format, standard online converters often fail to process it.
Convert.Guru analyzes your DOI file, detects the exact format, and lets you read the text inside.
If you want to convert DOI file to BIBTEX, URL, RIS or APA, you can use FitGirl Repacks Installer or similar software from the "Optional game data archive" category. In the File menu, look for Save As… or Export….
To convert files to DOI, try FitGirl Repacks Installer or another comparable tool in the "Optional game data archive" category.
The DOI Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our DOI converter.