If the relays do not match, the browser clients cannot find each other across the WebRTC network. Summary of Resolution Options Target Audience Primary Goal Install ViaVersion & ViaRewind Server Admins Translates 1.20.1 packets down to 1.8.8. Server-Side Configure BungeeCord Proxy Server Admins Maps WebSocket ports to Java Edition servers. Client-Side Download 1.20 HTML Client Players / Students Runs an emulated or pre-patched client file. Client-Side Sync Network Relay URLs Multiplayer Players Fixes peer-to-peer browser connection failures. If you need help setting up the network configuration, Share public link
rate_limit: enabled: false websocket: compression: false
Modern Minecraft versions (1.13+) are significantly more resource-intensive than the older versions Eaglercraft was built upon. A "fix" for 1.20.1 often refers to the community's attempts to solve several critical issues: Performance Bottlenecks
. Because it is a modified version, it frequently encounters performance and compatibility bugs. 🛠️ Common Fixes for Eaglercraft 1.20.1 Fix Lag & Low FPS to "Fast" and turn to "Minimal" and Smooth Lighting eaglercraft 120 1 fix
Eaglercraft is an open-source project that uses compile utilities like TeaVM and specialized OpenGL-to-WebGL emulators to translate standard Java bytecode into browser-ready JavaScript and WebAssembly.
Many tutorials and discussions use "1.20.1" as a shorthand for wanting features from that update, like Cherry Blossom biomes, Sniffers, or the Archaeology system. They are searching for ways to bring the content of 1.20.1 into Eaglercraft, not a perfect port of the game's code.
, attempt to use Python and HTML to achieve instant boot times and improved skin/pet features. The "Fix" Client If the relays do not match, the browser
Because these are community ports, "1.20" clients are often in beta and may have missing textures or broken sound. 4. ChromeOS / School Chromebook Fixes If you are playing on a managed device:
Most of these fixes are bundled into the "Update 2" or "Patch 1" releases of the client. If you are hosting this, ensure your classes.js file is the updated one. If you are playing, clear your browser cache to force it to load the patched JavaScript files.
If you are the server owner, you must install the ViaVersion and ViaBackwards plugins on your BungeeCord or Spigot instance. This allows newer 1.20.1 servers to accept connections from older Eaglercraft clients. Client-Side Download 1
Before we dive into the fixes, let's take a look at some of the common issues players have reported:
If you are a server owner or trying to connect to a friend's server, the "fix" is more complex. The Eaglercraft 1.20.1 client requires a specific backend to translate the web-based protocol to standard Minecraft Java protocol.