To open octet-stream files, we should know the extension of the file which was converted to octet-stream file.

If the text file was converted to an octet-stream file, then you have to update the octet-stream downloaded file with extension .txt.

If a compressed file was converted to an octet-stream file, then you have to update the octet-stream downloaded file with extension .zip.

octet-stream help us to protect our files.