Luca Hammer on Twitter: "Conclusion: PPMd gave me the best compression results for a 64MB JSON file. Small size (4MB) and super fast (7 seconds). Other algorithms that are available in 7zip
Modern7z
GitHub - Chaython/7-Zip-ZSTD-Portable: 7-Zip with additional algorithms, made portable. Windows x64 Sources: https://github.com/mcmilk/7-Zip-zstd + https://portableapps.com/apps/utilities/7-zip_portable & some needed modifications.
Download 7-Zip ZS - MajorGeeks
Milkys Homepage - 7-Zip with support for Zstandard, Brotli, Lz4, Lz5 and Lizard Compression