Opening a 3UC File

The 3UC file type is primarily associated with 7-Zip.

3UC	File extension: 3UC
	File type:	backup archive

What is a 3UC file

3UC files mostly belong to 7-Zip.

3UC files store iPhone contacts backups. They use the ZIP format to compress contact data for safer storage.

To open and view a 3UC file:

Rename the file extension to .zip if your archive tool does not recognize it.

Open the file with a common decompression program such as 7-Zip or WinZip.

Extract the contents to access your contact information.

FilExt.com tip: This method simplifies backup and restoration of contact data on iOS devices.

How can I open a 3UC file?

You need a suitable software like 7-Zip to open a 3UC 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 3UC file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a 3UC file directly in the browser:. Just drag the file onto this browser window and drop it.

Online 3UC Text Viewer

Choose your .3uc file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert 3UC files:

7-Zip
See the previous paragraphs to learn more about the main application. 3UC files are often referred to as 7-Zip backups because this type of file is primarily created or used by this software.
iOS
A .3UC file is a zipped archive, specifically a backup of contacts from an iOS device, such as an iPhone. It contains contact details exported from the iOS Contacts app and is used for backup and transfer purposes. This file format is classified as Backup File.

3UC file extension format:

Every file has a defined file format, i.e. how the data is arranged in the file. The initial characters of a file are called signature, sometimes also referred to as "magic bytes". The signature can be used to infer the file format. However, different programs can use the same file extension, and file extensions can be assigned incorrectly. If there are problems opening a file, you must first determine the file format used. In the following you will find our evaluation of the 3UC files:

The 3UC file extension mainly uses a defined 3UC format. The file formats most commonly found in 3UC files are:

98% of all 3UC files use ZIP compression, so multiple files are compressed and stored together in one 3UC file. A 3UC file can contain up to 16 files (mostly 8 - 16). Customary file names are contact_1.plist. If you'd like to see the images and files included, just rename the file extension to .zip and double-click. The file size is in the range of 13 KB to 1 MB. Several words can almost always be found in the files, e.g. contact_0.plist. An example of a file name is Contact.3uc or iPhone_20180601.3uc. Such files are related to phone and contacts.

All the rest of the 3UC files (2%) have different formats. If you want to find out what your 3UC file contains, drag and drop it onto this page.

Technical Data for 3UC File Extension

File classification:

Backup

a 3uc backup archive is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with 3UC files

Associate the 3UC file extension with the correct application.
Update your software that should actually open backup archives. Because only the current version supports the latest 3UC file format. Search, therefore, e.g. on the manufacturer website after an available 7-Zip update.
To make sure that your 3UC file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .3UC file online - secure, fast, and no downloads needed.