Что такое 7Z? Полное руководство по формату 7Z

Year1999

TypeАрхив

UsageАрхивирование с максимальным сжатием

What is it?

7Z — это родной формат архива бесплатной, с открытым исходным кодом утилиты 7-Zip. Он использует алгоритм сжатия LZMA, который обеспечивает значительно лучшее сжатие, чем ZIP и RAR.

7Z достигает сжатия на 30-70% лучше, чем ZIP, для многих типов файлов, оставаясь полностью бесплатным и с открытым исходным кодом, что делает его лучшим выбором для максимального сжатия без затрат.

Technical Specifications

Software7-Zip (free, open-source)

CompressionLZMA/LZMA2 (best available)

LicenseOpen source / LGPL

EncryptionAES-256

Max File SizeVirtually unlimited (16 exabytes)

Compression Ratio30-70% better than ZIP

Pros & Cons

Advantages

Best Compression

7Z achieves the highest compression ratios of any common archive format.

Completely Free

7-Zip is free and open-source - no paid software required to create 7Z files.

AES-256 Encryption

Strong encryption for secure password-protected archives.

No Size Limits

7Z supports files and archives up to 16 exabytes.

Disadvantages

Less Compatible

7Z is not natively supported by Windows or macOS - requires 7-Zip software.

Slower Compression

Maximum compression with LZMA uses significant CPU time and memory.

Less Familiar

Many users are not familiar with 7Z format compared to ZIP.

No Error Recovery

Unlike RAR, 7Z does not have built-in error recovery records.

When to Use It

Вот самые распространенные ситуации, когда 7Z (архив 7-Zip) является правильным выбором:

Maximum Compression

Use 7Z when ZIP is too large and you want the best compression for free.

Software Distribution

7Z is excellent for distributing large software packages efficiently.

Backup Archives

7Z creates very compact backups with strong encryption.

Sharing Large Files

When file size limits are a concern, 7Z minimizes archive size.

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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.