什么是 7Z（7-Zip 压缩文件）？
7Z 文件格式完整指南
最后更新:
What is it?
7Z 是免费的开源 7-Zip 工具的本地压缩格式。它使用 LZMA 压缩算法，提供比 ZIP 和 RAR 显著更好的压缩效果。
对于许多文件类型，7Z 的压缩效果比 ZIP 提高 30-70%，同时完全免费和开源，使其成为最大压缩而不产生费用的最佳选择。
Technical Specifications
Pros & Cons
Advantages
7Z achieves the highest compression ratios of any common archive format.
7-Zip is free and open-source - no paid software required to create 7Z files.
Strong encryption for secure password-protected archives.
7Z supports files and archives up to 16 exabytes.
Disadvantages
7Z is not natively supported by Windows or macOS - requires 7-Zip software.
Maximum compression with LZMA uses significant CPU time and memory.
Many users are not familiar with 7Z format compared to ZIP.
Unlike RAR, 7Z does not have built-in error recovery records.
When to Use It
以下是 7Z（7-Zip 压缩文件）是正确选择的最常见情况：
Maximum Compression | FileFormer
Use 7Z when ZIP is too large and you want the best compression for free.
Software Distribution | FileFormer
7Z is excellent for distributing large software packages efficiently.
Backup Archives | FileFormer
7Z creates very compact backups with strong encryption.
Sharing Large Files | FileFormer
When file size limits are a concern, 7Z minimizes archive size.
转换 7Z（7-Zip 压缩文件）
需要转换您的 7Z 文件吗？使用我们的免费在线转换器。
转换 7Z（7-Zip 压缩文件）Frequently Asked Questions
Is 7Z better than ZIP?
7Z achieves significantly better compression than ZIP. Use 7Z for maximum compression, ZIP for maximum compatibility.
How do I open 7Z files?
Download and install 7-Zip (free) from 7-zip.org. Windows 11 24H2 includes basic 7Z support natively.
Is 7Z better than RAR?
7Z generally compresses better than RAR and is free/open-source. RAR has better error recovery. Both are excellent.
How do I create 7Z files?
Install 7-Zip, right-click files, and select “7-Zip > Add to archive...” Choose 7Z as the format.
Is 7Z encryption secure?
Yes, 7Z uses AES-256 encryption which is extremely secure when using a strong password.