Released: Apr 23, 2026

Updates in V26.4

Features

• Compose Apple archive (.aar) with LZ4 or LZMA compression methods.
• Added the ability to extract codec chain in 7z archive folders.
• You can now extract ARM64 and ARM32 codecs in 7z archive folders.
• Extract BCJ2 codecs in 7z archive folders.

Released: Mar 27, 2026

Updates in V26.3

Features

• You can now append entries to existing 7z archives.
• Added the ability to adjust CAB archives when combining entries in a folder.

Released: Feb 28, 2026

Updates in V26.2

Features

• Added the ability to extract a ZIP archive from a read-only stream.
• Exposed the ZIP archive comment (archive-level) and allow setting a comment for an individual entry.

Fixes

• Fixed ZIP64 End of Central Directory properties when compressing large files.

Released: Jan 31, 2026

Updates in V26.1

Features

• Reduced allocations in various header composition routines.
• Introduced deferred sources for entry composition and immediate source closing for 7Z and CAB.
• Introduced a version for Python via .NET 10.
• Improved checksum performance with ARM64 intrinsics on .NET 10.
• Improved Zlib compression speed on .NET 10.

Released: Dec 10, 2025

Updates in V25.12

Features

• Added support for CAB archive composition with MSZIP compression.

Released: Nov 28, 2025

Updates in V25.11

Features

• Reduced memory consumption for XAR table of content.
• Prevented memory leak if not unsubscribed from entry events.
• Reduced size of self-extracting executable module.
• Verified setting LZMA dictionary size for LZMA archive.
• Users can now set the number of fast bytes and literal context bits for LZMA algorithm within a ZIP container and the LZMA archive itself.
• Users can now set the number of fast bytes and literal context bits for LZMA algorithm within a 7z container.

Released: Sep 28, 2025

Updates in V25.9

Features

• Added support for extracting non-merged LZX archive.

Fixes

• Properly released file having wrong headers after archive fails to extract from it.

Released: Aug 22, 2025

Updates in V25.8

Features

• Added solid compression for encrypted 7z archives.
• Added optional Data Descriptor for Zip folder entry.
• You can now store host OS mark.

Fixes

• Fixed exception on solid compression exceeding trial size.

Released: Jul 24, 2025

Updates in V25.7

Features

• Added solid compression for plain 7z archives.

Fixes

• Proper instantiation of detected Arj archive.
• Correct commentaries for 'XarLoadOptions'.

Released: Jun 30, 2025

Updates in V25.6

Features

• You can now cancel archive extraction via cancellation token.
• You can now verify archive disposal on instance operations.
• You can now cancel zip entry extraction with event handler.