Tired of waiting for 7-Zip to finish? 🧱 Official 7-Zip doesn't support the algorithm, but the "Zstandard" mod fixes that.
This is the "interesting" version you are likely looking for. It is a fork that adds several modern compression methods directly into the 7-Zip UI and command line. Supported Codecs: Adds LZ4, Zstandard (Zstd), Brotli, Lizard, and Lz5. The LZ4 Advantage: LZ4 is designed for extreme speed
for using LZ4 in automated backups or large-scale data transfers?
: To make LZ4 compression accessible to users, the 7zip command-line interface and graphical user interface (GUI) need to be updated. This involves adding options for selecting LZ4 compression and displaying relevant compression settings. modded 7zip for lz4
Some AVs flag modded compressors because they modify system context menus and inject explorer extensions. This is usually a false positive. Submit the binary to VirusTotal; if 1–2 engines flag it but it’s from GitHub, it’s safe.
The modded 7zip, which incorporates LZ4, brings the best of both worlds to the table. By combining 7zip's renowned compression ratios with LZ4's incredible speeds, users can now enjoy:
A modern algorithm that balances high speed with competitive compression ratios. Tired of waiting for 7-Zip to finish
The official 7‑Zip (from Igor Pavlov) is built around the 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:
Modern video games often consist of thousands of small files. Using standard LZMA compression on a game folder can take hours. LZ4 offers a massive speed advantage. It is a prime candidate for "cold storage" of game collections where disk space is less of a constraint than the time required to repack the data after an update.
The official 7-Zip cannot unpack these .lz4 files. Users rely on the "Modded 7Zip for LZ4" to right-click these files and select "Extract Here" to access the raw boot.img or system.img for flashing via Odin. It is a fork that adds several modern
Reviewers on Hacker News note that while Zstandard is often seen as the modern "middle ground," LZ4 remains the undisputed king for pure speed. Releases · mcmilk/7-Zip-zstd - GitHub
Before diving into the mod, it is crucial to understand why you would want LZ4 support. LZ4 is a lossless compression algorithm focused almost exclusively on maximizing compression and decompression speed.