legacy read supported format archives (e.g. old
backup or save files in ACE, ARJ,
LHA), which may be, or become,
obsolete - surpassed in terms of compression, performances, encryption
features, or be troublesome to support in future systems
recipients of data archived in a suitable, widely
supported format - usually ZIP,
for compatibility with most systems
and most archive managers, or TAR,
widely employed on Unix and Unix-like environments.
multiple existing save
files (even from composite formats) in a single backup archive -
removing "Add each object to a separate
archives with better compression ratio, as
more computing power and better compression algorithms are available;
i.e. 7z/p7zip optimized Deflate algorithm compresses 2-10% smaller ZIP
archives preserving full compatibility with format specifications
standard, and 7Z format usually
attain 30-70% better compression than
classic ZIP format
non-free archive formats (ACE, RAR, ZIPX) with free ones
(7Z, ZIP) which can be supported by Free Software without being
encumbered by patents' issues, in order to guarantee the format to stay
supported even after the original author ceases development.
allows to convert existing
archives, belonging to any of the
150+ formats supported for extraction (CAB, ISO, RAR, ZIPX...), into
any archive format supported
for writing (7Z, WIM, TAR, ZIP and more popular file formats), on
Microsoft Windows and Linux systems.
In example, RAR archives can be converted to ZIP format (that is
ubiquitously supported) or to 7Z format (which offers better
compression), or to TAR format (widely supported on Unix-like systems).
This function also comes handy when the user, for an afterthought,
wants e.g. to recompress the archive using higher compression settings,
or to apply encryption, etc.
The software can work on multiple archives at the same time (even of
different formats), either
converting each input archive in a separate file in the chosen target
format, or consolidating the multiple input archives in a new single
archive of the desired format.
Non-archive files can be added as well to the input list, and will be
compressed (or consolidated) in the chosen archive format.
In any case when using Conversion function input archives are firstly
extracted and then recompressed in the new format, in order to get
optimal compression ratio.
To convert existing archives, click on "Convert"
button in applications
tool bar, or check the "Convert existing archives" option in archive
creation dialog; add files to conversion procedure as for normal
archive creation, as explained in the FAQ and in program's
Flag "Add each object to a separate
archive" if you want to create a
separate output archive file for each input object, ie.e. to perform a
mass file conversion of input archives, or uncheck the option if you
prefer to merge all the input data in a single archive, i.e. to
consolidate a set of backup.
input file is encrypted, user needs to provide correct password to
perform archive conversion, otherwise archive data will not be readable
and extraction stage will not complete.
If verbose mode is selected, after the extraction stage file conversion
procedure asks for
confirmation to proceed with compression, this allows to abort the
process in case of problems (disk full, unknown password, corrupted
archives etc) or to further modify the uncompressed data before the
final compression stage.
After the compression stage, file conversion procedure asks for
confirmation before deleting temporary files and folders created for
conversion, however original archives are not deleted and not modified
in any stage of the conversion to always let the user in full control
about keeping or removing them.
If "verbose mode" option is unchecked (default) archive conversion can
proceed unattended once OK button is clicked.
Articles related with archive types characteristics and conversion from
one archive type to another:
External online resources: list of file
archiving formats on
Topics and serach suggestions: convert existing archives between
archiving formats, free rar
convert rar to zip / 7z format, encrypted files, convert file, change
file type, consolidate archives, re-compress data wiki, mass batch file
conversion utility for Microsoft Windows and Linux operating systems,
iso to zip
conversion, convert legacy ace archives.