PeaZip provides read/write support for .zip files, working as
extractor, opener (list, search and explore archived files and
directories), converter from/to Zip format, and integrity testing
ZIP is the default
archive format for PeaZip, which uses optimized 7-Zip/p7Zip Deflate
implementation to reduce zip file size while keeping compatibility with
other archival utilities.
The software can also manage password protected zip archives (encrypt
decrypt), and convert files to / from zip format.
Read more: what is ZIP file format
As alternative utilities, 7-Zip (on MS Windows systems) and p7zip (on
both free and Open Source tools, are recommended for working with zip
Compress to ZIP format
one of the following procedures to add
folders to a new or
into an existing .zip file
archive creation interface it is possible to apply encryption (recipient will need
to enter a password to read/extract the archive), and to split files - set creation
of multiple volumes declaring
the maximum output size
(spanned archive), in order to keep the output size
below mandatory limits (e.g. upload or mail attachment size).
Zip files from the system's file
Select files and folders and use
entry PeaZip, Add to archive: you will be prompted to archive creation
screen, allowing to set compression settings, output destination,
encryption (password protection), and other options.
From "Advanced" tab, you can
fine-tune compression settings: faster or higher compression level,
algorithm, solid compression
block size, compress open files, create self extracting archive (SFX)
will not need an archive
program to extract the data...
From "Console" and "Schedule" tab, the compression / backup task
created in the GUI can be saved as command line script and (on Microsoft
operating system) scheduled for execution at fixed time intervals
(hour, day of the week or of the month) - same apply for extraction /
restore tasks, as the same tabs are featured in archive extraction
Update existing ZIP archive
To update existing archive,
adding files and folders, proceed as shown above for archive creation,
but select an existing
archive as output and chose add (always
replace files in archive) or update (overwrite
only older files in archive) "archive function" in
Easiest way to edit an existing archive is opening it in PeaZip and
dragging files/folders to it, which will automatically activate update
mode - can be changed into add mode in advanced tab.
To remove (delete) data from
the archive, select items and press cancel or "Delete from archive"
button. Deleted items will not be recoverable from recycle bin.
Entries in the context menu on the right of delete button allows to
delete the entire archive in different supported ways (recycle, quick
delete, overwrite with zeroes, secure
delete shredding data to make the archive not recoverable)
convert ZIP files
archive to ZIP format and vice versa is possible using the
integrated file converter
procedure, clicking Convert button,
which extracts and then re-pack input archive files, optionally keeping
or deleting original
More generally this utility makes possible to convert any type
supported for reading (e.g. 7Z, ACE, ARC, CAB, PEA, RAR, TAR, ZIP,
ZIPX...), even mixed extensions at once, into any write-supported
format (7Z, ARC, PEA, TAR, ZIP...), either converting each single input
archive to a single output archive, or consolidating all input files
into a single output archive in the new format.
Open ZIP files
a WinZip's ZIP file, and to browse and search
content inside the archive:
- double click the zip archive, if file
extension is associated with the PeaZip (default)
- if zip file type is not associated with
PeaZip, right-click on the archive and use system
context menu "Open as archive" entry,
will attempt to read any user provided file type regardless file
Extract ZIP files
the procedures described below to decompress
To extract a spanned (split) ZIP file, save all the parts in the same
directory, then open as usual the first volume of the archive, which
has Z01 or 001 extension - subsequent volumes have
progressively numbered file extensions (Z02, Z03 etc).
Manage encrypted ZIP archives
To create, or extract, an encrypted
.zip file, enter
the password in PeaZip clicking the padlock icon in the status bar
(in the file/archive browser) or below output address
field (in extraction or archiving interfaces), or click Tools >
password / keyfile in main menu, or press F9 accelerator key.
Supported algorithms for zip encryption, from Archive creation,
Advanced tab, are:
items inside the archive are marked by * sign.
AES256 (WinZip's Advanced Encryption
ZipCrypto, for legacy support only
Please note zip format
supports file-level encryption so multiple passwords can be used in the
same archive to encrypt different group of files - and consequently in
this case different password must be provided to access each part of
the archive, changing password entered in PeaZip.
"Keyfile" field is optional, leave it blank if you don't want to rely
factor authentication - keyfile is the "what you have" element (needs
to be handled safely), password (or passphrase) is the
non-material "what you know" element; both are needed for
recovering the encrypted file content.
Use of keyfile increases security over password
only encryption since also having access to the keyfile will be
required to perform the extraction, eliminating the need of overly
complex passwords to resist to social engineering profiling, and
brute-forcing or dictionary attacks.