Minecraft Java 1.21 Mods
Browse 15 free mods for Minecraft Java 1.21 — popular picks include Advanced Fishing, Sewing Kit, Custom Guns.
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Advanced Fishing
This mod overhauls fishing with 49 new fish, biome-based catches, lava fishing, new enchantments and curses, custom potions, early-game tools like the Chum Bucket, and fully reworked fishing mechanics.
Sewing Kit
Adds a Sewing table and mechanic similar to the vanilla cartography or stonecutting
Custom Guns
A fully customizable datapack & mod for Minecraft 1.20.5+ that features custom guns that fully integrate with the surrounding world. Anyone can make their own gun with a straightforward command setup.

IFramesTweaker
Tweaks How Invincibility Frames are handled to make fast weapons function properly.
AcornLib
An API with features to make modding easier, including new Components, Particles, Weapon Skins, and Supporter Perks.
Gun Core Fancy's Patch
A modification of Gamingbarns Gun Core made to have extra capabilities, while being compatible with normal gun core
Adventure Item Names
Unique names for weapons, tools, armour and items found throughout your world.
Unstable Twist
A chaotic Minecraft plugin that adds powerful custom weapons inspired by Unstable SMP and Heartless Horizon.
Lightning Lotad [Remastered]
This is a recreation of the 1.6.4 mod, "Lightning Lotad", brought to Minecraft 1.20.1 This mod adds new tools & weapons as well as new materials and blocks!
One Hit Punch
This mod adds a fist ( weapon ), with whom you can kill anyone! Even the Warden!
SmartLootFilter
Take control of your inventory in Minecraft 1.21.11! Smart Loot Filter lets you choose exactly which items to pick up using a simple menu with categories like Weapons, Armor, Tools, Food, and more. Perfect for servers and singleplayer. Requires Fabric API.
iammojogo's Uncrafting Mod
This mod is a mod that allows users to uncraft crafted items to gain back resources from items they don't need and don't want to throw away or burn.
PackItems
PackItems is a Spigot 1.21+ plugin that turns YAML-defined custom items into fully routed, action-driven weapons and tools, with automatic resource-pack generation, built-in HTTP hosting, and TextAPI support.
Two-Dimensional Foil
A mod that adds a two-dimensional foil weapon from The Three-Body Problem. Drop it to collapse blocks and creatures into an irreversible, mirror-like 2D plane within a configurable radius. Requires Fabric API.
FrontCore Cosmetics&Crates
A cosmetics add-on for FrontCore adding gun’s skins items and more