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Minecraft Java 1.21 Mods

Browse 8 free mods for Minecraft Java 1.21 — popular picks include Fiber-Optic Cables, Sky Crushes, SpaceFrog's Frog Variant Changer.

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Fiber-Optic Cables
1.21.1neoforge

Fiber-Optic Cables

Adds a fiber optic cable, used to instantaneously transfer multiple redstone signals within a one block space.

924downloads
Sky Crushes
1.21.1neoforge

Sky Crushes

SkyCrushes is a progression-based processing mod that adds mechanical Trituradores (Crushers) to process raw minerals, geodes, and space materials.

619downloads
SpaceFrog's Frog Variant Changer
1.21.5

SpaceFrog's Frog Variant Changer

Change a frog's variant type using a vanilla/survival-friendly method. Works with vanilla (cold, temperate, warm) and optionally 'More Frogs 2' variants: crimson, ender, infernal, poison dart, purpur, sculk, spirit, warped, and wood.

197downloads
Minecraft But There Are RPG's
1.21fabric

Minecraft But There Are RPG's

Five rocket launchers. One mission. Maximum destruction. Craft your way from a humble iron tube to a reality-warping Neon Launcher — fully survival-friendly, fully explosive.

142downloads
FirmaLifeHardCore
1.21.1neoforge

FirmaLifeHardCore

A mod that completely overhauls Firmalife's cellar and greenhouse mechanics — no Climate Station required. Enclosed spaces are auto-detected via BFS floodfill with dynamic AABB tracking. Any insulating blocks form a functional cellar or greenhouse.

130downloads
SpaceFrog's Cat Variant Changer
1.21.5

SpaceFrog's Cat Variant Changer

Change a cat's breed (variant type) using a vanilla/survival-friendly method. Choose from all kitty varieties: black, calico, jellie, orange (red), persian, ragdoll, shorthair, siamese, tabby, tuxedo, white & a special random type.

94downloads
Flight Mod (1.21, 1.20.1) – Glide With Hunger Not Rockets
1.21fabric

Flight Mod (1.21, 1.20.1) – Glide With Hunger Not Rockets

Flight Mod lets you fly in survival mode by consuming hunger instead of using Elytra or creative mode. It’s a lightweight, client-friendly way to add immersive flight mechanics without breaking balance Features: Enables hunger-based flight in survival, no Elytra or rockets needed Costs food per tick, per meter flown horizontally, and per meter climbed Includes […]

BBL Flight Blocks Mod (26.1.2, 1.21.1) – Fly In Survival Mode
1.21.1

BBL Flight Blocks Mod (26.1.2, 1.21.1) – Fly In Survival Mode

BBL Flight Blocks Mod adds a unique, area‑based flight mechanic to Minecraft, suited for survival and creative play. Players can place a special Flight Anchor block that grants creative‑style flight within its configurable radius-no elytra or rockets required. Features: Added a new block that allows players to fly while in this block zone. Screenshots: BBL […]