Click the "Select File" button above, and choose your PREFS file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert PREFS to another file type
To convert your PREFS file to another format, you need Eclipse IDE or other Settings software.
Convert a file to PREFS
To convert other file formats to the "Configuration File" file type, you need software like Eclipse IDE or a similar tool.
About PREFS files
A .prefs file is a configuration container primarily used by the Eclipse IDE to store project-specific settings, code style preferences, and compiler options. These files are also utilized by the Unity game engine (PlayerPrefs) and various Java-based applications to save user customizations.
The real problem for users is that .prefs files rarely have a default file association in Windows or macOS, meaning they cannot be opened by double-clicking. While many are simple text files following the key=value Java Properties format or structured XML, the operating system often treats them as unknown binaries. Furthermore, some legacy applications serialize Java objects directly into these files, making them unreadable without the specific software version that created them.
To view or audit these settings without installing the full Eclipse IDE, the best approach is to convert the file to TXT (Plain Text) for immediate inspection in any editor. for structured data handling, converting to JSON or XML is ideal if the content parses correctly. For documentation or archiving configuration snapshots, converting to PDF ensures the settings are preserved in a fixed layout.
Convert.Guru analyzes your PREFS file, detects the exact format, and lets you read the text inside.
If you want to convert PREFS file to INI, CFG, CONF, CONFIG, JSON, XML, YAML, YML, TOML, ENV, PROPERTIES or RC, you can use Eclipse IDE or similar software from the "Application Preferences Storage" category. In the File menu, look for Save As… or Export….
To convert ZSHRC, CONF, RCFILE, GITCONFIG, RC, PLIST, BASHRC, CONFIG, PROFILE, INI, CFG or PROPERTIES files to PREFS, try Eclipse IDE or another comparable tool in the "Application Preferences Storage" category.
The PREFS 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 PREFS converter.