Opening a UIN File

The UIN file type is primarily associated with ICQ.

UIN	File extension: UIN
	File type:	2001+ Saved ICQ Contact Information

What is a UIN file?

UIN files mostly belong to ICQ by ICQ Inc. Use our "Online UIN Text Viewer" below to analyze your UIN file and to see all text it contains.

How to open UIN files

You need a suitable software like ICQ to open a UIN file. You need a suitable software like ICQ from ICQ Inc. to open a UIN file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your UIN file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a UIN file directly in the browser:. Just drag the file onto this browser window and drop it.

Online UIN Text Viewer

Choose your .uin file to analyze

or drag and drop it here

Online File Viewer

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.UIN File Won't Open? Here is What You Can Do

UIN files can originate from different programs and aren't universally openable.

Identify the Source: If you found it in an old chat backup, it is likely 2001+ Saved ICQ Contact Information. If it came from a legacy database, it may be a custom user ID file.
Check the Header: Open the file in a text or hex editor to inspect the first few bytes:
- Plain text numbers or XML/JSON often indicate a simple contact list.
- Unreadable binary data suggests a proprietary database format.
Use the Original Software: You usually need the original program to open it properly. Try using ICQ (by ICQ Inc.) or a compatible legacy chat viewer. If uncertain, ask the sender.
Use this Webpage: Drag and drop your .UIN file onto this webpage to automatically detect its format, extract readable text, and preview its contents.

Technical Data for UIN File Extension

Related files:

btt, ign, icq

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: icquser, FileType: ICQ User, AppName: ICQ Application
EXEFile: ICQ.exe

ProgramID: icquser, FileType: ICQ User, AppName: ICQRun
EXEFile: ICQLRun.exe

ProgramID: icquser, FileType: ICQ User, AppName: ICQRun
EXEFile: ICQRun.exe

ProgramID: icquser
EXEFile: %ProgramFiles%\ICQ\ICQLite\ICQLRun.exe %1

ProgramID: icquser
EXEFile: %ProgramFiles%\ICQ\ICQRun.exe %1

ProgramID: icquser
EXEFile: %ProgramFiles%\ICQLite\ICQLRun.exe %1

ProgramID: icquser
EXEFile: E:\ICQ\ICQRun.exe %1

ProgramID: icquser
EXEFile: ICQLRun.exe

ProgramID: icquser
EXEFile: %ProgramFiles%\IRINUZZA\ICQLite\ICQLRun.exe

ProgramID: icquser
EXEFile: %ProgramFiles%\ICQ\ICQ.exe

ProgramID: icquser
EXEFile: %ProgramFiles%\icq\ICQLRun.exe

ProgramID: icquser
EXEFile: %ProgramFiles%\ICQLite\ICQLRun.exe

ProgramID: icquser
EXEFile: %ProgramFiles%\ICQ6\ICQLRun.exe

ProgramID: icquser
EXEFile: %ProgramFiles%\ICQ\ICQRun.exe

Show all 14 listings To Top

a uin 2001+ Saved ICQ Contact Information is a special file format by ICQ Inc. and should only be edited and saved with the appropriate software.

How to solve problems with UIN files

Associate the UIN file extension with the correct application.
Update your software that should actually open 2001+ saved icq contact informations. Because only the current version supports the latest UIN file format. Search, therefore, e.g. on the ICQ Inc. manufacturer website after an available ICQ update.
To make sure that your UIN file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .UIN file online - secure, fast, and no downloads needed.