Minecraft Java 1.21 Mods
Browse 12 free mods for Minecraft Java 1.21 — popular picks include Arda's Sculks (Ancient City Portal / Deep Dark Dimension), MiniPlaceholders, LANBroadcaster.
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Arda's Sculks (Ancient City Portal / Deep Dark Dimension)
Arda's Sculks mod is a mod that improves the ancient city in the game and offers the ability to open the ancient portal in the ancient city. This mod adds many deep dark biomes to the game and many boss creatures found in these biomes.
MiniPlaceholders
MiniMessage Component-based Placeholders API for Minecraft Platforms
LANBroadcaster
Broadcast your Minecraft server over the local area network and have it appear in the LAN server list
Broadcast++ | The Ultimate Broadcast Plugin
Customizable broadcasts for chat, titles, and images with gradients & rainbow effects
VCustomBrand
Customize the brand to display to players on your Velocity network

Fancy Tags
Simply put images in chat. No resource pack needed.
Cobblemon x NIT Integration
An addon for Cobblemon and New In Town adding Cobblemon-themed structures
Crystal Town Mod
A mod that adds a slightly elaborate universe! A couple of dimensions, lots of interesting mobs, progression, magic wands and toxic weapons!
Personalized Favicon
The Personalized Favicon Plugin everyone knows :)
The ShadyBunch
Ever wanted to explore magic as a law-loving scientist? Command airships by night and be an interior designer by day? Or, a Pixelated chef running two restaurants in your new metropolis city? It can all be yours! Step into the shade, lets bunch together!

Cristalline
This mod add an all new mechanic to ametyst by giving the opportunity to grow electricity powered crystals and make new items for survival.
Urbanfroma-fireworks
Urbanforma: Fireworks adds customizable fireworks to Minecraft for celebrations, city events, and immersive nighttime displays.