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Minecraft 1.21.3 Mods

35 of the 117 mods here have a build for Minecraft 1.21.3. 1.21.3 needs jars that were built for 1.21.3. Utility 13, Library 7, Performance 6 are the biggest groups on 1.21.3. Fabric 34, Forge 31, NeoForge 30, Quilt 14 is how 1.21.3 splits over the loaders.

25 makers publish something for 1.21.3. Check the loader as well as the number: 1.21.3 exists per loader. 5 of the 1.21.3 mods want a library beside them. Every mod on this 1.21.3 list also reaches another version.

Mods for this version
35 of 117 documented here
Loaders
Fabric 34 · Forge 31 · NeoForge 30 · Quilt 14
Biggest groups
Utility 13 · Library 7 · Performance 6
Download here
21 files on our own server
Fabric APIBeginner

The core API module for Fabric mods providing essential hooks and utilities required by nearly all Fabric mods.

FabricQuilt
Library
500M
Cloth ConfigBeginner

A configuration screen API that provides a standardized way for mods to display and edit their settings in-game.

ForgeFabricNeoForgeQuilt
Library
250M
JourneyMapBeginner

A real-time mapping mod that renders explored terrain as a minimap and fullscreen map with waypoints and mob tracking.

ForgeFabricNeoForge
Utility
200M
Architectury APIAdvanced

A cross-platform modding API that allows developers to write mods compatible with both Forge and Fabric from a single codebase.

ForgeFabricNeoForgeQuilt
Library
200M
GeckoLibAdvanced

An animation library for Minecraft mods that enables complex entity animations created in Blockbench.

ForgeFabricNeoForgeQuilt
Library
180M
JadeBeginner

A tooltip mod that shows information about what you are looking at, including block details, entity info, and mod data.

ForgeFabricNeoForge
Utility
150M
SodiumBeginner

The leading rendering optimization mod for Fabric, dramatically improving frame rates through a rewritten rendering engine.

FabricQuilt
Performance
150M
Biomes O' PlentyBeginner

One of the most popular biome mods, adding over 50 new biomes with unique terrain, vegetation, and atmosphere to world generation.

ForgeFabricNeoForge
World Generation
130M
Xaero's MinimapBeginner

A lightweight minimap mod with entity radar, waypoint management, cave maps, and a customizable display position.

ForgeFabricNeoForge
Utility
130M
Mouse TweaksBeginner

Enhances inventory management with improved mouse dragging behaviors for faster item manipulation.

ForgeFabricNeoForgeQuilt
Utility
120M
Xaero's World MapBeginner

A fullscreen world map companion to Xaero's Minimap showing explored terrain with waypoints and cave layer navigation.

ForgeFabricNeoForge
Utility
110M
ControllingBeginner

Adds a search bar and conflict detection to the keybinding settings screen, essential for modpacks with many keybinds.

ForgeFabricNeoForge
Utility
100M
AppleSkinBeginner

Adds hunger and saturation information overlays to the HUD and tooltips, showing food value before eating.

ForgeFabricNeoForgeQuilt
Utility
100M
BalmBeginner

A cross-loader abstraction library used by Waystones, Cooking for Blockheads, and other mods by BlayTheNinth.

ForgeFabricNeoForge
Library
90M
WaystonesBeginner

Adds placeable waystones that players can attune to and teleport between, providing a convenient fast-travel system.

ForgeFabricNeoForge
Utility
85M
LithiumBeginner

A server-side optimization mod that improves game logic performance including entity AI, world gen, and block ticking.

FabricQuilt
Performance
80M
Iris ShadersBeginner

A shader mod for Fabric that allows OptiFine shader packs to be used alongside Sodium for maximum performance.

FabricQuilt
Performance
80M
Roughly Enough ItemsBeginner

A recipe viewer and item browser for Fabric and Forge, serving as a feature-rich alternative to JEI with plugin support.

ForgeFabricNeoForgeQuilt
Utility
80M
CitadelBeginner

A modding library required by Alex's Mobs and Ice and Fire providing animation systems, entity utilities, and data tools.

ForgeNeoForge
Library
70M
Storage DrawersBeginner

A storage mod adding compact drawer blocks that display their contents visually, with upgrades for capacity and features.

ForgeFabricNeoForge
Utility
70M
Cooking for BlockheadsBeginner

Adds a multiblock kitchen with a recipe book that shows all food you can cook from your available ingredients.

ForgeFabricNeoForge
Farming
65M
FerriteCoreBeginner

A memory optimization mod that reduces RAM usage by optimizing block state storage and other internal data structures.

ForgeFabricNeoForgeQuilt
Performance
60M
ClumpsBeginner

Groups XP orbs together into a single entity, reducing lag from large numbers of orbs in mob farms and grinders.

ForgeFabricNeoForge
Performance
55M
Nature's CompassBeginner

A compass that can locate any biome in the world, displaying distance and direction to help players find specific biomes.

ForgeFabricNeoForge
Utility
45M
Carry OnBeginner

Lets players pick up and carry blocks, tile entities, and even mobs by shift-right-clicking, and place them elsewhere.

ForgeFabricNeoForge
Utility
45M
TerralithBeginner

A vanilla-style biome overhaul using only vanilla blocks, adding dramatic terrain features and over 85 new biomes.

ForgeFabricNeoForgeQuilt
World Generation
40M
Macaw's DoorsBeginner

Adds a wide variety of aesthetically designed doors and trapdoors in multiple wood types and styles for building.

ForgeFabricNeoForge
Decoration
40M
Inventory Profiles NextBeginner

An advanced inventory management mod with auto-sorting, auto-refill, profile saving, and locked slots.

ForgeFabricNeoForge
Utility
35M
Macaw's RoofsBeginner

Adds sloped roof blocks, gutters, attic walls, and skylight blocks for building realistic rooftops in every material.

ForgeFabricNeoForge
Decoration
35M
Player AnimatorBeginner

An animation library enabling mods to add custom player animations, required by Better Combat and other combat mods.

ForgeFabricNeoForgeQuilt
Library
35M
ImmediatelyFastBeginner

Optimizes immediate-mode rendering used by HUDs, GUIs, text, and item displays for a notable FPS boost.

ForgeFabricNeoForge
Performance
30M
Macaw's BridgesBeginner

Adds a variety of bridge components including supports, stairs, railings, and rope bridges in multiple wood types.

ForgeFabricNeoForge
Decoration
30M
Macaw's FurnitureBeginner

A furniture mod adding chairs, tables, desks, drawers, wardrobes, and other home furnishings in every wood type.

ForgeFabricNeoForge
Decoration
25M
TectonicBeginner

A terrain overhaul mod that generates dramatically larger mountains, deeper valleys, and more varied continent-scale landforms.

ForgeFabricNeoForgeQuilt
World Generation
15M
Dungeon CrawlBeginner

Generates massive multi-level dungeon towers below the surface with varied rooms, traps, spawners, and loot.

ForgeFabric
Adventure
12M

Frequently asked questions

  1. What is there for 1.21.3?

    35 of the 117 mods documented here ship a 1.21.3 build, from 25 makers. They split as Fabric 34, Forge 31, NeoForge 30, Quilt 14.

  2. Which loader should I use on 1.21.3?

    Fabric carries the most here on 1.21.3, 34 mods. A mod is built per loader and per version, so the file has to match both. One profile runs one loader.

  3. Is a 26.2 jar fine on 1.21.3?

    No. A jar is compiled against one game version. A build for 26.2 will not load on 1.21.3, and the other way round it fails too. The mod page names every version its maker signed off.

  4. Where do 1.21.3 downloads come from?

    21 of the 1.21.3 files sit on our own server, unchanged, with the checksum of the maker's build beside them. The rest link to the maker because his licence keeps every right with him.