Rawnet's Crystal Optimizer
by rawnet
Rawnet's Crystal Optimizer is a Fabric client mod that changes how End Crystals appear and disappear for the player who installs it.
What it does
The mod places and breaks End Crystals on the client at once, without waiting for the server to confirm each action. The crystal appears or vanishes on the player's screen as soon as the click happens, which hides most of the delay a player would normally feel during ping-heavy crystal PvP. Predictions run locally, while the server still decides what actually lands.
Because the optimizer touches only the client, it does not change server-side behavior, and servers need nothing installed. Players may find combos easier to land while fighting through their own latency. Every tweak is adjustable through Mod Menu, and the setup needs no extra files or commands.
The mod is for Fabric players who fight with End Crystals on multiplayer servers. It runs on Fabric for 1.21 – 26.2 with 16 release versions covered, and its latest file is 1.0.0 for 26.2, published on 2026-08-08. The code is released under the MIT License and is not open source.
Key features
Instant crystal placement
End Crystals render on the client the moment they are placed, instead of waiting for server confirmation.
Instant crystal breaking
Crystals disappear on the client as soon as they are struck, so the break feels immediate even at high ping.
Full Mod Menu configuration
Every optimizer setting can be toggled and tuned through Mod Menu, with no config files to edit by hand.
Server behavior untouched
The client-side prediction leaves server logic alone, and the server remains the authority on what lands.
Gallery
Compatibility
Latest build for each game version and loader.
26.x4 of 4 versions with builds
1.21.x12 of 12 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Crystal PvP on laggy servers
Players fighting over high-latency connections can keep crystal placement and breaking responsive during fights.
Who it’s for: Fabric players who take part in End Crystal PvP on multiplayer servers, especially those on connections with high ping. Server owners do not need to install anything.
How it compares
FastCrystal is a Fabric mod for 1.21 – 26.3 that requires the client and can run with or without a server. Marlow's Crystal Optimizer is open source under the MIT License and supports Fabric and NeoForge for 1.19 – 26.3, while Akinoko Crystal Optimizer is client-side only under All rights reserved and covers 1.21 – 1.21.11. Rawnet's Crystal Optimizer is Fabric only, client-side, and released under the MIT License without being open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Rawnet's Crystal Optimizer | Fabric | 1.21 – 26.2 | Client-side only | 2026-08-08 |
| FastCrystal | Fabric | 1.21 – 26.3 | Client required, server optional | 2026-09-21 |
| Marlow's Crystal Optimizer | Fabric and NeoForge | 1.19 – 26.3 | Client-side only | 2026-10-07 |
| Akinoko Crystal Optimizer | Fabric | 1.21 – 1.21.11 | Client-side only | 2026-07-12 |
Questions
Does Rawnet's Crystal Optimizer need to be installed on the server?
Which loader does Rawnet's Crystal Optimizer support?
Can the optimizer be configured without editing files?
In the catalog
Rawnet's Crystal Optimizer is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 13,894 mods support Minecraft 26.2.
More from rawnet
Similar mods
What the author says
A client-side End Crystal optimizer for crystal PvP. When you place or break a crystal, the mod renders it on your client right away instead of waiting for the server to confirm. That hides most of the delay you'd normally feel from ping, so fights stay snappy even on a bad connection. It all runs locally as a…
Official listing
- Modrinth page
- modrinth.com/mod/rawnetcrystaloptimizer
- Owner
- rawnet
- Published
- 2026-06-14
- Updated on Modrinth
- 2026-08-08
- Facts verified
- 2026-10-15