is a free cross-platform file encryption and archiver utility that
provides an unified
portable GUI for many Open Source technologies like 7-Zip, FreeArc,
PAQ, UPX... free alternative to WinRar, WinZip and
- Create 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP
- Open and extract ACE, ARJ, CAB, DMG, ISO, LHA,
RAR, UDF, ZIPX files and more, over 180 archive types
Features of PeaZip includes: archives
opener and extractor, batch creation and extraction
archives at once, convert files, create
self-extracting archives, split and join files,
strong encryption with two factor authentication, encrypted password
manager, secure deletion, find
duplicate files, calculate hash and checksum,
export job definition as script.
Change password of existing
Mainstream archive formats (including 7Z, RAR, and ZIP/ZIPX) supports
file level encryption, which means a single archive can (potentially)
contain files encrypted with different passwords, and even mix
encrypted and non encrypted files - updating existing archives let user
provide an arbitrary password at each instance.
Extraction of data
from encrypted archives requires the appropriate
password being provided to the decryption procedure, consequently
working with an archive protected by different passwords for different
group of files it needs to separately, selectively, extract each group
of file with the right password.
To set encryption / decryption password in PeaZip, click on the
the standard way to change
password to existing archive, or to remove password(s) is to:
This also means
not possible, by design, to implement a fast password-changing
mechanism in archive formats supporting this feature.
modification mechanisms usually rely
on encrypting data with a random system-generated password, which is
then encrypted with actual
user-provided password, and finally added to the header of the file.
user-provided password would then be possible simply
decrypting and re-encrypting the header area containing the random
system-generated password (used to encrypt the actual data).
A similar mechanism
replace password in header would not support encrypting single files
with different passwords (or let them unencrypted) as required by 7z,
rar, and zip standards, which results in fast password modification
mechanisms being ruled out by design.
Both steps can be
time-consuming if large archives are involved - as,
basically, to modify password the existing archive needs to be
extracted with the old password and re-created with the new password.
extract the old archive, providing the needed current (old) password(s) - the password that will
re-create the new archive, providing the new password - if you want to remove
/ reset password simply omit it
PeaZip can help in each step of password change process, allowing to
extract multiple files at
once (even mixed types), and to create multiple separated archives at
once, flagging "Add each object to a separate archive" option. This
allows to work on batches of files at once.
Convert archives feature can
help automating this procedure: flagging "Change password" switch the user
will be asked to provide a new password to be applied
to archive(s) being converted.
Adding a password to
unencrypted archive(s) is inherently simpler - as the program
does need to know old password(s) - and can be automated using archive
conversion procedure. In this case it is sufficient to add
to conversion procedure, and set a password, to have archive(s)
extracted and the re-created with encryption.
PeaZip can save current task as batch script,
in order to help
automating recurring works, please note passwords will be saved - in
order to have batch password-change process run unattended, without
asking for user
interaction, namely typing the password - so batch scripts containing
saved passwords must be securely managed.
PeaZip supports creating encrypted files under following standards -
which can be set as destination
formats when changing archive password:
utility also supports, only for extraction, decrypting
password-protected ACE, RAR, and ZIPX archives.
WinZip AE (Advanced
Encryption), AES256-based, or ZipCrypto (for legacy support only)
- ARC with
FreeArc AES256, Twofish256, Serpent256, and
- PEA with
PeaZip AES, Serpent and Twofish
(128/256 bit) EAX-mode
Those formats can only be used as sources, not destinations, when
replacing password - as the destination of password change needs to be
a format supported for
writing - so in this case archive type conversion to a fully supported
format is required to modify the password protecting the data.
> Security > Chage / remove password of existing encrypted
Topics and search suggestions about how to change or remove encryption
password for existing
archives (7Z, ARC, RAR, ZIP...), how to decrypt and re encrypt files
with PeaZip in order to modify current archive's encryption
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