Opening 1 files

Did your computer fail to open a 1 file? We explain what 1 files are and recommend software that we know can open or convert your 1 files.

What is a 1 file?

The .1 file extension is used by a variety of computer applications. It is commonly used by the File Splitter software to assign a number to a volume of a split file. This happens when a large archive file is created and the user wants to split the archive file down into smaller volumes. The .1 file extension is given to the first file of the split file archive.

The .1 file extension is also used by the Unix operating system when the system creates an unformatted manual page. In some cases Mozilla Firefox will also use the .1 extension, giving it to files that store data about cookie, image and pop-up permissions. AIM Messenger also uses the .1 extension for certain IM files.

Try a universal file viewer

In addition to the products listed above, I would suggest that you try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and very likely yours too! Download Free File Viewer.

By Prof. Jones (The File Expert)

Chief Content Editor and File Expert

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