Because Eaglercraft is decentralized, you must find a stable host or run it locally. Here is the safest method for playing offline.
While newer versions like 1.18 or 1.20 exist, version 1.15.2 occupies a sweet spot in the Eaglercraft ecosystem for three specific reasons: eaglercraft 1.15.2
Eaglercraft is a browser-based port of Minecraft Java Edition.
The 1.15.2 version specifically mimics Java Edition 1.15.2 features (bees, honey blocks, scaffolding, etc.) but may not be 100% perfect. Because Eaglercraft is decentralized, you must find a