Extract text from Game save files (OSI)
To convert OSI Saves to another format, you need Divinity Engine or other Game software.
To convert other file formats to the "Save Game Data" file type, you need software like Divinity Engine or a similar tool.
The .OSI file extension is primarily associated with proprietary game data, specifically serving as the Game Save Information file for Overlord II and the Story Save file for Larian Studios games like Divinity: Original Sin.
For Overlord II players, this file acts as a binary container for progress, character stats, and world state. It is strictly proprietary, meaning standard text editors cannot open it, and attempting to modify it without a specialized hex editor often results in a corrupted save.
For Larian Studios titles utilizing the Osiris scripting engine (such as Baldur's Gate 3 or Divinity: Original Sin 2), the .OSI file compiles story logic and event triggers. Modders and developers frequently need to convert these files to readable TXT or XML formats to debug scripts or create mods. However, because these are compiled binary databases, they are incompatible with standard conversion tools like Adobe Acrobat or Microsoft Word. For Overlord II saves, the file is best left converted only for backup purposes (e.g., to ZIP for storage) or edited with specific community-made save editors.
Convert.Guru analyzes your OSI file, detects the exact format, and lets you read the text inside.
Users also converted ESF, RWS and THEWITCHERSAVE files.
If you want to convert OSI file to INI, CFG, CONF, CONFIG, JSON, XML, YAML, YML, TOML, ENV, PROPERTIES or RC, you can use Divinity Engine or similar software from the "Game Save & Script Data" category. In the File menu, look for Save As… or Export….
To convert ZSHRC, CONF, RCFILE, GITCONFIG, RC, PLIST, BASHRC, CONFIG, PROFILE, INI, PREFS or CFG files to OSI, try Divinity Engine or another comparable tool in the "Game Save & Script Data" category.
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 OSI converter.