.081 File

The 081 file extension is associated with several archivers or compression tools, which are using, or did use in the past, the 081 file extension for its multi-volume files or archives, such as Winrar or 7-Zip.

The general file sequence is 001, 002, 003, etc.. and you will need all parts of the multi-volume archive to successfully extract the content.

How to open:

Use WinRAR compression utility to extract archive contents and start with first archive (first archive file has mostly file extension rar or 000 or 001).

How to convert:

Extract archive ant then compress to another archive file format (like .zip etc.)