The formats support by File Roller include:
Archive only
AIX Small Indexed Archive (.ar)
ISO-9660 CD Disc Image [Read-only mode] (.iso)
Tape Archive File (.tar)
Archive and compression
Java Archive (.jar)
WinRAR Compressed Archive (.rar)
Tape Archive File compressed with:
gzip (.tar.gz, .tgz)
bzip (.tar.bz, .tbz)
bzip2 (.tar.bz2, .tbz2)
lzop (.tar.lzo, .tzo)
7zip (.tar.7z)
xz (.tar.xz)
Cabinet File (.cab)
ZIP Archived Comic Book (.cbz)
ZIP Archive (.zip)
ZOO Compressed Archive File (.zoo)
For some file formats, File Roller may require additional plugins.