Portable Minecraft Java Edition 1.21.10 (Fabulously Optimized)

https://archive.org/details/minecraft-1.21.10-portable.-7z

A Portable Version Of Minecraft's "Fabulously Optimized" Modpack, Yes, No installation needed, just unzip and run it, Just like that.

Tested them on thumb flash drives and put across various computers i can get my hands on, Absolute wonders.

For more details and customizations, Check out the description in the link post, Have fun!