free rar opener, zip file archiver utility


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PeaZip is a free cross-platform file 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 similar proprietary software.
- Create 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP files
- Open and extract ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF, ZIPX files and more,
over 180 archive types supported
Features of PeaZip includes:
archives opener and extractor, batch creation and extraction of multiple 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.

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How to update files in archive

replace files inside existing archives

Update and replace files inside existing archives

The simplest way to update an existing archive with PeaZip is to open it and drag new content to the application window: archiving interface will be shown in update mode, adding new files to the current archive and overwriting existing ones if input files are newer - more recent modification date.

More options are available from archiving creation interface - clicking on "Add" button.

how to update zip files

“Function” dropdown sets the policy to apply when a pre-existing archive with the chosen name is found on the system:
  • New archive (default) will force the creation of a new archive, assuring it has unique name

  • Add adds the input data to the specified archive, if an archive with same name exists, overwriting any matching file already inside the archive - add option assures input files overwrite archived files, input version will be featured in the final archive regardless they are newer or older than matching files inside the initail archive

  • Update (default when dragging files into an existing archive open in PeaZip file browser) adds the input files and folders to the archive, overwriting matching files in the archive only if input files are newer than archived files - update option assure latest/newer version of files (regardless they are from the input or in the original archive) will be featured in the final archive and never get replaced

  • Update only files already in archive “freshen” the archive content: works as update, but ignoring (not adding) input files not already in the archive

  • Synchronize archive with disk works as update, but archived files not featured in the input will be deleted from archive - synchronizing is the opposite of freshening operation, freshen excludes files on disk not matching with archive content, synch excludes archived files not matching with disk content, in both cases excluded files are not featured in the final archive

update existing archives

Please note PeaZip can update (modify) only file formats it is able to write.
This means read-only supported formats cannot be changed, nor updated (but can be converted to a fully supported archive format).
Write-supported file types are: 7Z, FreeArc's ARC / WRC, BZ2, BCM / QUAD / BALZ, GZ, *PAQ family (ZPAQ, LPAQ, PAQ), PEA, TAR, WIM, ZIP, and plain split files .001 (as created by 7-Zip/p7zip, HJSplit, PeaZip, and "split" Unix command).

To edit content inside an encrypted archive, the correct password must be provided, clicking locker icon on the right of Output field.
Write-supported encryption standards that can be written from PeaZip, in order to update encrypted archive, are:

update encrypted files

  • 7Z with 7-Zip AES256 encryption
  • ZIP with WinZip AES256 AE, and ZipCrypto for legacy compatibility
  • ARC with FreeARC AES256, Blowfish, Twofish256 and Serpent256
  • PEA with AES256 EAX authenticated encryption

Please note some formats (BZ, GZ, XZ) only provides single-file compression capability, and usually compress a TAR archive containing actual content: all the above information apply to the TAR archive, which needs to be extracted and handled directly in order to be updated.

freshen files in archive

If solid compression is used, compression process depends on statistical analysis of previously compressed data, which may delay the update process as more data (than the sole input files) needs to be processed and replaced.




FAQ > Archiving > Update archives

Topics about updating existing archives, add, delete or modify content in place

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update archive content
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replace file already in archive
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