7Z vs GZ — Differences, File Size & When to Use Each

7Z vs GZ

Un confronto dettagliato tra 7-Zip Archive e Gzip Compressed: dimensioni del file, qualità, compatibilità e quale formato scegliere per il tuo flusso di lavoro.

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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.

Informazioni sui file 7Z

Gzip Compressed

Archives & Compressed

Gzip is a single-file compression format based on the DEFLATE algorithm. It is most commonly paired with TAR to create .tar.gz archives and is the standard compression for web content delivery.

Informazioni sui file GZ

Confronto dei punti di forza

7Z Punti di forza

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.

GZ Punti di forza

Patent-free, royalty-free — that was the whole point in 1992.
Universally supported on every OS.
Fast compression and extremely fast decompression.
Preserves original timestamps and filenames in the header.
Streamable — can compress/decompress over pipes.

Limitazioni

7Z Limitazioni

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.

GZ Limitazioni

Compresses one file at a time — needs tar for multi-file archives.
Older algorithm — Zstandard, xz, and brotli all beat it on ratio.
Single-threaded in the reference implementation (pigz fixes this).
Not as aggressive as modern codecs on highly redundant data.

Specifiche tecniche

Specifica	7Z	GZ
MIME type	application/x-7z-compressed	application/gzip
Compression	LZMA, LZMA2, PPMd, Bzip2, DEFLATE	—
Max file size	16 EB (exabytes)	—
Encryption	AES-256 (content + filenames)	—
License	LGPL	—
Extensions	—	.gz, .tgz (with tar)
Algorithm	—	DEFLATE (LZ77 + Huffman coding)
Standard	—	RFC 1952 (gzip), RFC 1951 (DEFLATE)
Header	—	10 bytes: magic, method, flags, mtime, extra, filename, comment, crc, isize

Dimensioni tipiche dei file

7Z

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

GZ

Plain text file 25-40% of original
HTML page 20-30% of original
Source code archive 15-30% of original
Already-compressed file (JPEG, MP4) 99-100% (no gain)

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Domande Frequenti

Carica il tuo file 7Z su KaijuConverter per convertirlo in PDF, JPG, PNG o altri formati standard direttamente nel browser senza installare programmi.

Carica il tuo file GZ su KaijuConverter per convertirlo in PDF, JPG, PNG o altri formati standard direttamente nel browser senza installare programmi.

Sì, è gratuita fino a 25 MB (fino a 1 GB con Pass 24h o Pro) e tutti i file vengono eliminati automaticamente dai nostri server dopo 60 minuti.