What is the UIN file format?
A file with the .UIN extension is a file known as ICQ 2001 Saved ICQ Contact Information. It belongs to the Settings Files category. This format is associated with ICQ LLC.
The reliable way to open a .UIN 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 .UIN 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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