它可以把经WinZip压缩文件再压缩2-10%。

7-Zip是一款号称有着现今最高压缩比压缩软件，它不仅支持独有7z文件格式，而且还支持各种其它压缩文件格式，其中包括ZIP, RAR, CAB, GZIP, BZIP2与TAR。此软件压缩压缩比要比普通ZIP文件高30-50%。

7-Zip is so-called having nowadays highest compression ratio compresses software, it supports form of particular 7z file not only, and still support all sorts of other to compress file format, include ZIP among them, RAR, CAB, GZIP, BZIP2 and TAR. This software compresses compression ratio to want taller than common ZIP file 30-50% . Accordingly, it can compress classics WinZip the file compresses 2-10% again.