You can play directly on Eaglercraft Clients , which hosts specific distributions for 1.21.4 featuring rendering improvements and support for newer game mechanics.
Find the "Offline Download" link (usually a .html or .zip file). eaglercraft 121 4 download link
. While "Eaglercraft 1.21" projects and "EaglercraftZ" feature ports exist, they are often community-made recreations or "viaversion" clients that use 1.8.8 files to connect to newer servers rather than being native 1.21.4 builds Current Official Status Latest Official Version : The official Eaglercraft site currently lists as the latest release Version Compatibility : Most active players use the Eaglercraft 1.8.8 You can play directly on Eaglercraft Clients ,