Not exactly.
While many players use online links, downloading an allows you to play without an active internet connection and bypass most network filters. eaglercraft download 1.12
If you are a developer looking to compile a custom 1.12 version from available sources: Not exactly
Look for a file named EaglercraftX1.8_Offline.html or similar. This is the full game in a single file. Save it anywhere on your computer. eaglercraft download 1.12
The original, most stable, and most popular version of Eaglercraft is based on (and partially 1.8.8). The creator (lax1dude) built it using JavaScript and WebGL to run inside a browser.
Follow these steps to play a 1.12-style experience right now: