LZ4 vs XZ — Differences, File Size & When to Use Each

LZ4 vs XZ

Um comparativo detalhado de LZ4 Compressed e XZ Compressed — tamanho de arquivo, qualidade, compatibilidade e qual escolher de acordo com seu fluxo de trabalho.

Converter LZ4 → XZ Converter XZ → LZ4

LZ4

LZ4 Compressed

Archives & Compressed

LZ4 is an extremely fast lossless compression algorithm focused on speed over compression ratio. It can compress at over 500 MB/s per core and decompress at multiple GB/s, making it the standard choice for real-time and in-memory compression.

Sobre os arquivos LZ4

XZ Compressed

Archives & Compressed

XZ provides very high compression ratio using LZMA2, common in Linux packages.

Sobre os arquivos XZ

Comparativo de vantagens

LZ4 Vantagens

Decompression speed — approaches memcpy throughput.
Very fast compression — can keep up with SSD write speeds.
Stable format — reference implementation unchanged for years.
Widely deployed in databases, filesystems, and kernels.
BSD-licensed library.

XZ Vantagens

Best-in-class compression ratio among mainstream tools.
Streaming-capable — can pipe through network.
Multi-threaded compression available.
Mature on every Linux distribution.
Supports integrity checking (CRC32, CRC64, SHA-256).

Limitações

LZ4 Limitações

Compression ratio lags gzip by 20-30%.
Not designed for long-term archival where ratio matters.
Older than zstd, which beats LZ4 at comparable speed at slightly better ratio.
Rare as a user-facing format — lives mostly inside databases and filesystems.

XZ Limitações

Slow compression at high levels — 3-5× slower than gzip.
Memory-hungry: xz -9 can need 700+ MB to compress.
2024 supply-chain backdoor damaged trust in the project.
Zstandard outperforms xz at similar ratios with less memory.

Especificações técnicas

Especificação	LZ4	XZ
MIME type	application/x-lz4	application/x-xz
Extensions	.lz4	.xz, .txz
Algorithm	LZ77 variant with fast byte-level parsing	LZMA2
License	BSD 2-Clause (library), GPL v2 (CLI)	—
Typical integrations	Linux kernel, ZFS, Kafka, RocksDB, Cassandra	—
Standard	—	The .xz File Format specification 1.1.0
Integrity checks	—	None, CRC32, CRC64, SHA-256

Tamanhos típicos de arquivo

LZ4

Text file 40-60% of original
Already-compressed data (JPEG, MP4) 99%+ (no gain)
Database page (typical) 55-70% of original

XZ

Text/source archive 15-25% of original
Linux kernel (.tar.xz) ~125 MB
Firefox source code ~600 MB

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Perguntas frequentes

LZ4 (LZ4 Compressed) is an archive format used to bundle multiple files and folders into a single compressed file. The archive preserves the directory structure and typically reduces total size via compression. LZ4 sits in the archives & compressed family and has specific strengths around compression ratio, speed, or platform support.

LZ4 (LZ4 comprimido) is an archive formato used to bundle multiple arquivos e folders em a single comprimido file. The archive preserves the directory structure e tipicamente reduces total size via compressão. LZ4 sits no archives & comprimido family e has specific strengths around compressão ratio, speed, ou plataforma support.

7-Zip, WinRAR, The Unarchiver (macOS), and the built-in archive utilities on Windows and macOS open most LZ4 files. For command-line extraction, 7z, unar, or the format-specific tool handles LZ4 cleanly. If your extractor does not recognise LZ4, convert to ZIP first — ZIP opens on every operating system without extra software.

7-Zip, WinRAR, The Unarchiver (macOS), e the built-in archive utilities no Windows e macOS abrir most LZ4 files. para command-line extraction, 7z, unar, ou the formato-specific tool handles LZ4 cleanly. If your extractor does not recognise LZ4, converter to ZIP first — ZIP opens on every operating system sem extra software.

Upload the LZ4 to KaijuConverter and pick ZIP, 7Z, TAR.GZ, or RAR as the target. Our pipeline extracts the original archive and re-compresses the contents into the target format. File permissions, timestamps, and directory structure are preserved where both formats support them.

Depends on the goal. ZIP is the universal baseline — every OS extracts it out of the box. Formats like 7Z or TAR.GZ compress better but require specific tools. LZ4 may win on compression ratio, password support, or OS integration for specific workflows; ZIP wins on raw compatibility.