Informazioni sui file LZMA

LZMA (LZMA Compressed · Formato archivio)

Rilasciato 1998 Di Igor Pavlov

LZMA Compressed (.lzma) è un formato di file standard supportato da KaijuConverter per l’archiviazione, la condivisione e la conversione multipiattaforma.

Famiglia

Archives & Compressed

Estensione

.lzma

Tipo MIME

application/x-lzma

Utilizzabile come

Input Output

La storia

COME LZMA
È NATO.

1998

2001

2026

LZMA — Lempel-Ziv-Markov chain Algorithm — was published in 1998 by Russian programmer Igor Pavlov inside his 7-Zip archiver. The algorithm combines dictionary-based compression (descended from LZ77) with range coding and a Markov model for context prediction. At its highest settings LZMA achieves compression ratios that beat gzip by 30% and bzip2 by 10-15% at comparable quality levels, if with substantially higher CPU and memory demands.

LZMA is the core compression behind 7z archives, the xz format, and indirectly the `lzip` tool. Pavlov released the LZMA SDK in 2001 under public domain, triggering broad adoption: every Linux distribution shipped lzma/xz in userland; Android ships lzma decoders in the system image; Debian switched from bzip2 to xz for package compression. In 2026 LZMA variants remain the tool of choice when you need maximum compression with stable, production-proven tooling.

CURIOSITÀ E
ANEDDOTI.

LZMA's core algorithm powers 7-Zip, xz, .tar.xz, most modern Linux distros' kernel and package compression, and Debian's .deb payloads.

Igor Pavlov released LZMA SDK into the public domain in 2001 — one of the most consequential gifts to open-source compression.

The 2024 XZ backdoor (CVE-2024-3094) targeted xz-utils specifically, not the underlying LZMA algorithm — Igor Pavlov's code was intact.

LZMA uses adaptive range coding — the same math technique that underpins modern AI compression research.

LZMA2 (xz's actual algorithm) is a multi-threaded improvement over LZMA, designed to utilize modern multi-core CPUs.

PUNTI DI FORZA E
LIMITAZIONI.

Punti di forza

Highest-ratio mainstream compression (beats gzip by 30%).
Public domain SDK — royalty-free.
Mature since 1998 with no breaking changes.
Core of 7z, xz, .tar.xz workflows.
Multi-threaded LZMA2 scales across CPU cores.

Limitazioni

Slow compression at highest settings.
Memory-hungry — 1 GB+ for extreme compression levels.
Zstandard matches its ratios at less memory cost.
Raw .lzma files are rare — usually wrapped in .7z, .xz, or .tar.xz.

Dimensioni e pesi tipici

Text/source archive

15-25% of original

Linux kernel source (.tar.xz = LZMA2)

~125 MB

Windows system backup (.lzma)

25-40% of original

Specifiche tecniche

MIME type: application/x-lzma
Extensions: .lzma, .lz
Algorithm: Lempel-Ziv-Markov chain + range coding
Public domain SDK: Yes (since 2001)
Variants: LZMA (original), LZMA2 (multi-threaded, used in xz)

CONVERTI DA
LZMA

lzma zip lzma 7z lzma tar lzma gz lzma bz2 lzma xz lzma zst lzma lz4 lzma cpio lzma ar lzma apk lzma deb lzma rpm

CONVERTI IN
LZMA

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

Casi d'uso comuni

High-ratio single-file compression, 7-Zip ecosystem, embedded firmware