What is the OPAL file format?
A file with the .OPAL extension is a file known as Microsoft Office Customization Tool (OCT) Language-specific Settings. It belongs to the Settings Files category. This format is associated with Microsoft Corporation.
The reliable way to open a .OPAL file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
We are still gathering the list of programs that open .OPAL files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
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