How to Open LZH Files on Mac

UnFox opens LZH (also known as LHA) archive files on Mac by extracting their contents with drag and drop. LZH is a compression and archiving format that was widely used in Japan and in early BBS (bulletin board system) file distribution. macOS does not include native LZH support, but UnFox reads the LHA header structure and extracts all files.

What Is an LZH File and Where Does It Come From?

LZH is an archive format created by Haruyasu Yoshizaki in 1988 using the LZ77 and Huffman coding algorithms. The format became the dominant archive standard in Japan during the 1990s and was widely used on BBS systems worldwide for file distribution before ZIP became universal. LZH files use the .lzh or .lha extension. Modern users encounter LZH files when accessing retro computing archives, Japanese software repositories, and historical file collections.

How Do You Extract an LZH File on Mac?

Drag the .lzh or .lha file onto UnFox. The app reads the LHA archive header, decompresses each entry, and writes the files to your chosen destination.

Tip

UnFox handles all common LHA compression methods including lh5, lh6, and lh7 automatically.

UnFox handles all common LHA compression methods including lh5, lh6, and lh7. The extraction process includes progress tracking and preserves the original directory structure.

Marcel Iseli

Creator of UnFox · Indie Developer

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Marcel Iseli is an indie developer and the creator of UnFox. He builds native macOS and iOS utilities focused on privacy, simplicity, and zero tracking. Based in Switzerland, every app he ships is a one time purchase with no subscriptions and no data collection.

Frequently Asked Questions

LZH files are rare in modern use but still exist in Japanese software archives and retro computing collections. UnFox can extract them when you encounter one.

LZH and LHA refer to the same archive format. LHA is the name of the compression program, and .lzh is the common file extension. UnFox handles both extensions identically.