Search for "Eaglercraft 1.12.2 Tuff Client" on GitHub. Most developers host their .html files or "offline downloads" there. Look for repositories with recent stars and active commits.
, a project that allows Minecraft Java Edition to run directly in a web browser. While Eaglercraft originally gained fame for its 1.5.2 and 1.8.8 versions, the community has expanded into more modern versions like tuff client eaglercraft 1.12 download