LZ vs LZ4
A detailed comparison of Lzip Compressed and LZ4 Compressed — file size, quality, compatibility, and which format to choose for your workflow.
Lzip Compressed
Archives & CompressedLzip uses LZMA compression with error detection for reliable archiving.
About LZ filesLZ4 Compressed
Archives & CompressedLZ4 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.
About LZ4 filesStrengths Comparison
LZ Strengths
- LZMA compression without xz complexity.
- Per-segment CRC32 integrity.
- Multi-threaded plzip variant.
- GNU FSF endorsement.
LZ4 Strengths
- 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.
Limitations
LZ Limitations
- Tiny ecosystem vs xz.
- No native Windows GUI tools.
- Rarely default anywhere.
LZ4 Limitations
- 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.
Technical Specifications
| Specification | LZ | LZ4 |
|---|---|---|
| MIME type | application/x-lzip | application/x-lz4 |
| Extension | .lz | — |
| Algorithm | LZMA | LZ77 variant with fast byte-level parsing |
| Maintainer | Antonio Diaz Diaz | — |
| Extensions | — | .lz4 |
| License | — | BSD 2-Clause (library), GPL v2 (CLI) |
| Typical integrations | — | Linux kernel, ZFS, Kafka, RocksDB, Cassandra |
Typical File Sizes
LZ
- Source tarball compressed 15-25% of original
LZ4
- Text file 40-60% of original
- Already-compressed data (JPEG, MP4) 99%+ (no gain)
- Database page (typical) 55-70% of original
Ready to convert?
Convert between LZ and LZ4 online, free, and without installing anything. Encrypted upload, automatic deletion after 60 minutes.
Frequently Asked Questions
LZ (Lzip 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. LZ sits in the archives & compressed family and has specific strengths around compression ratio, speed, or platform support.
LZ (Lzip 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. LZ 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 LZ files. For command-line extraction, 7z, unar, or the format-specific tool handles LZ cleanly. If your extractor does not recognise LZ, 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 LZ files. para command-line extraction, 7z, unar, ou the formato-specific tool handles LZ cleanly. If your extractor does not recognise LZ, converter to ZIP first — ZIP opens on every operating system sem extra software.
Upload the LZ 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. LZ may win on compression ratio, password support, or OS integration for specific workflows; ZIP wins on raw compatibility.