LZ4 is optimized for speed (decompression up to several GB/s), not maximum compression ratio.
Security Warning: Because you are searching for "modded" software (not official), you are at risk of malware. Do not download pre-compiled binaries from random forum posts. modded 7zip for lz4
The official 7‑Zip (from Igor Pavlov) is built around the LZMA/LZMA2 family. These algorithms produce some of the highest compression ratios in existence, but at a steep speed cost. The developer has historically been conservative about adding more modern, speed-oriented codecs. As of 2025, official 7‑Zip supports: LZ4 is optimized for speed (decompression up to
To use LZ4 natively in a .7z container, you need a modified fork. Security Warning: Because you are searching for "modded"
Why go through the trouble of installing a modded 7-Zip for LZ4?
| Scenario | Algorithm Recommendation | Why? | | :--- | :--- | :--- | | Long Term Storage | 7z (LZMA2) | Best compression ratio. Saves disk space. CPU usage is high. | | Software Distribution | zstd | Balance of speed and ratio. Becoming the new industry standard. | | Real-time Backup | LZ4 | This is the use case. LZ4 is incredibly fast. It is designed so that disk I/O is the bottleneck, not the CPU. | | Memory Constrained | LZ4 | Uses very little memory compared to LZMA2. |
Note on Compatibility:
Be warned: Standard 7-Zip users cannot open your .lz4 files by default. You will need to tell your recipients to install 7-Zip ZS or a dedicated LZ4 tool.