PeaZip Portable 4.0 has been released. PeaZip Portable is the easy to use PeaZip file archiver packaged as a portable app, so you can take your file archiver with you and work with your compressed 7z, ZIP, GZIP, BZIP2, TAR, RAR files and more on the go. This release updates the included PeaZip to the latest release. It's packaged in PortableApps.com Format so it can easily integrate with the PortableApps.com Suite. And it's open source and completely free.

What's new in PeaZip 4.0
* PeaZip 4.0 introduces on the fly multi threaded image thumbnails visualization (browsing filesystem, on Windows), no image cache is saved on the host machine. Thumbnails ranges from 16 px to 256 px depending on the browser mode (details, list, icons) and size set from Organize in main menu.
* The user interface evolved through the 3.x family, and now features usability enhancements as address bar breadcrumb, search history, drag and drop context menus, tight integration of the browser with extraction shortcuts (i.e. Ctrl+E extract to..., Ctrl+Shift+E extract to desktop, Ctrl+1..8 extract to bookmarked folders), and toolbar buttons' context menus for advanced compression and extraction features.
* GUI elements as bars and browser are completely customizable, in order to offer a minimalistic or fully featured interface to fit at best user's needs and likes.
* PeaLauncher can now be used as very minimal GUI component for archive extraction, being able to accept input from drag and drop or standard file selection dialog, as well as from parameters.
* Pea backend was updated to 0.38 version.
* A total of 134 file extensions are supported, and translations are available in 27 languages.
* See full list of changes below.

PeaZip Portable 4.0 is packaged in a PortableApps.com Installer so it will automatically detect an existing PortableApps.com installation when your drive is plugged in. It supports upgrades by installing right over an existing copy, preserving all settings. And it's in PortableApps.com Format, so it automatically works with the PortableApps.com Suite including the Menu and Backup Utility.

PeaZip can extract most of archive formats both from Windows and Unix worlds: currently 134 file extensions are supported ranging from mainstream 7Z, RAR, TAR and ZIP to experimental ones like PAQ/LPAQ family, currently the most powerful compressor available.
For archive creation, PeaZip suppors a wide range of compression and encryption standard, from fastes to most powerful ones, and allows to export job definition as scripts to bridge the gap between GUI and console applications, and let the user pick the best of the two worlds.

Features:
* Full support (read and write)
o 7Z, 7Z-sfx, ARC/WRC, BZ2/TBZ2, custom, GZ/TGZ, PAQ/LPAQ, PEA, QUAD/BALZ, split, TAR, UPX, ZIP
* Read only (browse, extract, test)
o ACE, ARJ, CAB, CHM, COMPOUND (MSI, DOC, XLS, PPT), CPIO, ISO, Java (JAR, EAR, WAR), NSIS, Open Office files, PAK/PK3/PK4, RAR, SMZIP, U3P, UDF, VHD, WIM, XAR, XPI, XZ, Z/TZ, ...
* Repair
o ARC

PeaZip allows
* edit
* save and restore the contents of archives;
* Use powerful filters;
* handle multivolume archives at once;
* store the parameters of tasks;
* AES256 encryption, etc.
- Additional features:
* split / join files
* delete files
* compare
* create a file checksums
* performance test systems, etc.

Security
PeaZip has secure deletion feature, can verify file checksum and hash, and supports multiple strong encryption standards, optionally using two factor authentication (password and keyfile) for increased security:
* 7Z's AES256 encryption
* ZIP WinZip's AE encryption based on AES256 (and ZipCrypto for legacy compatibility); can decrypt PKZip's AES encryption
* FreeARC's ARC: AES256, Blowfish, Twofish256 and Serpent256 - this format is also capable to generate recovery records to protect data against corruption
* PEA: AES256 EAX authenticated encryption