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7Z vs LZ

7Z vs LZ

A detailed comparison of 7-Zip Archive and Lzip Compressed — file size, quality, compatibility, and which format to choose for your workflow.

Convert LZ → 7Z
7Z

7-Zip Archive

Archives & Compressed

7z uses the LZMA2 compression algorithm to achieve significantly better compression ratios than ZIP. It is open-source and supports strong AES-256 encryption.

About 7Z files
LZ

Lzip Compressed

Archives & Compressed

Lzip uses LZMA compression with error detection for reliable archiving.

About LZ files

Strengths Comparison

7Z Strengths

  • Outstanding compression ratio — typically 20–50% smaller than ZIP, 10–30% smaller than RAR.
  • Completely free and open source.
  • AES-256 encryption of both content and filenames.
  • Supports enormous archives (16 exabytes).
  • Multi-threaded compression on modern CPUs.

LZ Strengths

  • LZMA compression without xz complexity.
  • Per-segment CRC32 integrity.
  • Multi-threaded plzip variant.
  • GNU FSF endorsement.

Limitations

7Z Limitations

  • Not natively supported on Windows before Windows 11 23H2 or macOS — requires a separate tool.
  • Slower compression than ZIP (though decompression is fast).
  • No built-in recovery records like RAR.
  • Less ubiquitous in email and casual sharing than ZIP.

LZ Limitations

  • Tiny ecosystem vs xz.
  • No native Windows GUI tools.
  • Rarely default anywhere.

Technical Specifications

Specification 7Z LZ
MIME type application/x-7z-compressed application/x-lzip
Compression LZMA, LZMA2, PPMd, Bzip2, DEFLATE —
Max file size 16 EB (exabytes) —
Encryption AES-256 (content + filenames) —
License LGPL —
Extension — .lz
Algorithm — LZMA
Maintainer — Antonio Diaz Diaz

Typical File Sizes

7Z

  • Source code archive ~50% smaller than ZIP
  • Linux distro installer 2–10 GB
  • Virtual machine disk image 5–40 GB

LZ

  • Source tarball compressed 15-25% of original

Ready to convert?

Convert between 7Z and LZ online, free, and without installing anything. Encrypted upload, automatic deletion after 60 minutes.

Convert LZ to 7Z

Frequently Asked Questions

7Z is an open-source archive format from the 7-Zip project. It uses the LZMA2 compression algorithm which achieves significantly better compression ratios than ZIP or RAR, making it ideal for archiving large files and datasets.

7Z is an open-source archive formato de the 7-Zip project. It uses the LZMA2 compressão algorithm which achieves significantly better compressão ratios than ZIP ou RAR, making it ideal para archiving large arquivos e datasets.

7Z files open with 7-Zip (free, Windows), PeaZip (cross-platform, free), Keka (macOS), and The Unarchiver (macOS). Windows does not natively support 7Z, so third-party software is required.

7Z arquivos abrir com 7-Zip (free, Windows), PeaZip (cross-platform, grátis), Keka (macOS), e The Unarchiver (macOS). Windows does not natively support 7Z, so third-party software is required.

Use 7Z when maximum compression is the priority, such as software distribution and backups. Use ZIP when the recipient needs to open the file without installing extra software, since ZIP is natively supported everywhere.

Use 7Z when máximo compressão is the priority, como software distribution e backups. usar ZIP when the recipient needs to abrir o arquivo sem installing extra software, since ZIP is natively suportado everywhere.