Format de fichier

À propos des fichiers 7Z

7Z (7-Zip Archive · Format d'archive)

Lancement 1999 Par Igor Pavlov

7-Zip Archive (.7z) est un format de fichier pris en charge par KaijuConverter pour l’archivage, l’échange professionnel et la conversion multiplateforme.

Famille

Archives & Compressed

Extension

.7z

Type MIME

application/x-7z-compressed

Utilisable comme

Entrée Sortie

L'histoire

COMMENT 7Z
A VU LE JOUR.

7z is the open-source archive format created by Russian programmer Igor Pavlov in 1999, shipped as part of the 7-Zip utility. The format's headline feature is LZMA compression — a dictionary-based algorithm that routinely outperforms ZIP and RAR by 20–50% on typical files. Its open license and technical superiority made it the archival format of choice for Linux distributions, software installers, and anyone optimizing for size over compatibility.

The 7-Zip utility itself became a Windows staple — free, open source, no nag screen, no bundled adware — and the Linux port (p7zip) is standard in every distribution. The format is licensed under the permissive LGPL and has no royalty or usage restrictions.

CURIOSITÉS ET
ANECDOTES.

LZMA2 (7z's default codec) was later adopted by the xz utility — the compression ratio is legendary.

7z archives can hit 10× better compression than ZIP on text-heavy content.

7-Zip is one of the most-downloaded Windows utilities ever — hundreds of millions of installs.

The format supports AES-256 encryption on filenames AND contents — a feature ZIP still lacks in practice.

7z's author, Igor Pavlov, has maintained the project almost single-handedly since 1999.

POINTS FORTS ET
LIMITES.

Points forts

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.

Limites

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.

Tailles et poids typiques

Source code archive

~50% smaller than ZIP

Linux distro installer

2–10 GB

Virtual machine disk image

5–40 GB

Spécifications techniques

MIME type: application/x-7z-compressed
Compression: LZMA, LZMA2, PPMd, Bzip2, DEFLATE
Max file size: 16 EB (exabytes)
Encryption: AES-256 (content + filenames)
License: LGPL

OUTILS STUDIO POUR 7Z

Outils Spécialisés pour Fichiers .7Z

Voir les 45 outils →

archive →

Compress Files to ZIP

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Compress Image to 50KB

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merge →

Merge PDF

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compress →

Compress PDF

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CONVERTIR DEPUIS
7Z

7z zip 7z tar 7z gz 7z bz2 7z xz 7z lzma 7z zst 7z lz4

CONVERTIR EN
7Z

zip 7z tar 7z gz 7z bz2 7z xz 7z rar 7z tgz 7z cab 7z jar 7z war 7z lzma 7z zst 7z lz4 7z cpio 7z ar 7z apk 7z deb 7z rpm 7z lz 7z iso 7z dmg 7z snap 7z

Cas d'usage courants

Maximum compression, large file archives, encrypted storage.