Fabric 1.21.11 · 58M+ Downloads · Open Source

Fix 70+ Minecraft Bugs With One Mod

Debugify patches over 70 bugs from the Mojang bug tracker — client-side and server-side. One lightweight mod replaces 12+ single-fix mods. Free, open-source, fully configurable.

Download Debugify Explore Features
70+
Bug Fixes
58M+
Downloads
12+
Mods Replaced
100%
Free & Open Source

Why Debugify?

One mod to fix them all. Debugify consolidates dozens of bug fixes into a single, lightweight, configurable package.

70+ Bug Fixes

Patches over 70 bugs directly from the Mojang bug tracker. Every fix targets a real, documented issue — no guesswork.

Client & Server

Includes both client-side and server-side fixes. Server fixes also apply in singleplayer when installed on the client.

GUI Configuration

Toggle every fix individually through a clean GUI via Mod Menu, or edit the JSON config at .minecraft/config/debugify.json.

Replaces 12+ Mods

Consolidates BetterShields, No Telemetry, ToolTipFix, ChunkSavingFix, and more into one install. No conflicts.

Lightweight

Purely focused on bug fixes — no added features, no bloat. Minimal performance impact with maximum stability gains.

Modpack Friendly

Config option defaults new fixes to disabled, giving modpack authors full control. No surprises between updates.

Patched Bug Fixes

Every fix targets a real bug from the Mojang bug tracker. Toggle any fix on or off.

MC-577Mouse buttons block all inventory controls that are not default
MC-4490Fishing line not attached to fishing rod in third person while crouching
MC-12829Flying through ladders/vines/scaffolding in creative mode slows you down
MC-22882Ctrl + Q won't work on Mac
MC-46766Mining a block in Survival, then changing to Spectator creates a breaking animation
MC-55347Title with long duration shows in other world
MC-59810Cannot break blocks while sprinting (Ctrl+Click = right click on macOS)
MC-79545The experience bar disappears when too many levels are given
MC-80859Dragging item stacks over compatible stacks makes them invisible
MC-90683Received unknown passenger — entities with differing render distances
MC-93384Bubbles appear at the feet of drowning mobs
MC-105068Hitting a player blocking with a shield plays normal hurt sound
MC-108948Boat on top of slime blocks hovers over block
MC-111516Player flickers/turns invisible when flying at high speeds
MC-112730Beacon beam and structure block render twice per frame
MC-116379Punching with a cast fishing rod in off-hand detaches fishing line
MC-122627Tab suggestion box has missing padding on right side
MC-122477Linux/GNU: Opening chat sometimes writes 't'
MC-127970Using riptide on a trident with an off-hand item causes visual glitch
MC-143474Respawning causes your hotbar to reset to the first space
MC-159163Quickly pressing sneak causes the animation to play twice
MC-165381Block breaking delayed by dropping/throwing the tool while breaking
MC-176559Breaking process resets when a pickaxe with Mending mends by XP
MC-183776After switching gamemodes with F3+F4, you need to press F3 twice
MC-197260Armor Stand renders dark if its head is in a solid block
MC-215531Carved pumpkin overlay not removed when switching to spectator
MC-217716Green nausea overlay not removed when switching to spectator
MC-227169Main hand broken when holding crossbow loaded into secondary hand
MC-231097Holding 'Use' continues to slow down after dropping item
MC-237493Telemetry cannot be disabled
MC-2025Mobs going out of fenced areas / suffocate in blocks when loading chunks
MC-7569RCON output has newlines removed
MC-81872×2 jungle or spruce sapling arrangements cannot grow
MC-30391Chickens, blazes and the wither emit particles when landing from height
MC-69216Switching to spectator while fishing keeps rod cast
MC-81773Bows and tridents drawn in survival can be released in spectator
MC-88371Ender Dragon flies into the void when exit portal is destroyed
MC-89146Pistons forget update when being reloaded
MC-93018Wild wolves show breeding hearts but do not breed
MC-100991Killing entities with a fishing rod doesn't count as a kill
MC-119417Spectator can occupy a bed if they enter then are switched to spectator
MC-119754Firework boosting on elytra continues in spectator mode
MC-121706Skeletons and illusioners not looking up/down at target while strafing
MC-121903Command block minecarts don't save execution cooldown to NBT
MC-129909Players in spectator continue to consume food shortly after switch
MC-132878Armor stands destroyed by explosions/lava/fire produce no particles
MC-135971Can't use CTRL+Q in crafting table
MC-155509Puffed pufferfish can hurt the player while dying
MC-160095End Rods only break Cactus when moved by pistons
MC-179072Creepers do not defuse when switching from Survival to Creative/Spectator
MC-183990Group AI of some mobs breaks when their target dies
MC-199467Certain entity animations stop after existing in world too long
MC-200418Cured baby zombie villagers stay as jockey variant
MC-206705Spyglasses stay in use in spectator mode
MC-206922Items dropped by entities killed by lightning instantly disappear
MC-214147Skeletons wearing leather armor still convert to strays in powder snow
MC-215530Freezing effect not removed when switching to spectator
MC-223153Block of Raw Copper uses stone sounds instead of copper sounds
MC-224729Partially generated chunks not saved in some situations
MC-231743minecraft.used stat doesn't increase when placing plants in pots
MC-232869Adult striders can spawn with saddles in peaceful mode

Replaces 12+ Mods

Debugify consolidates the functionality of these single-fix mods into one lightweight package. No conflicts — they can coexist.

BetterShields

Shield hit sound fix

Shift-Scroll Fix

Inventory scroll fix

ForgetMeChunk

Chunk memory fix

ChunkSavingFix

Partial chunk save fix

No Telemetry

Disables telemetry

ToolTipFix

Tooltip rendering fix

Title Fix Mod

Title screen duration fix

Entity Collision FPS Fix

Entity collision perf fix

Skeleton Aiming Fix

Skeleton aim direction fix

Night Vision Flash Fix

Night vision flashing fix

Boat Fall Fix

Boat fall damage fix

Piston Fix

Piston update order fix

Installation Guide

Get Debugify running in under 2 minutes. Three simple steps.

01

Install Fabric Loader

Download and run the Fabric Loader installer for Minecraft 1.21.11. Select your Minecraft installation directory and click Install.

02

Download Debugify

Download the latest Debugify JAR file from the download section below. Optionally download Mod Menu for in-game GUI configuration.

03

Drop & Play

Place the Debugify JAR into your .minecraft/mods folder. Launch Minecraft with the Fabric profile and all 70+ fixes are active.

Download Debugify

Fabric 1.21.11 · Version 1.21.11+1.0 · Free & Open Source

Download Debugify
Fabric 1.21.11 58M+ Downloads LGPL-3.0

Frequently Asked Questions

Everything you need to know about Debugify.

What is Debugify?
Debugify is a free Minecraft mod that fixes over 70 bugs found on the official Mojang bug tracker. It works on both client and server, supports Fabric 1.21.11, and replaces 12+ single-fix mods with one lightweight installation. Created by isXander and licensed under LGPL-3.0.
How do I install Debugify?
Install Fabric Loader for Minecraft 1.21.11, download the Debugify JAR from the download section above, place it in your .minecraft/mods folder, and launch the game. Optionally install Mod Menu for in-game GUI configuration of individual bug fixes.
Is Debugify free?
Yes. Debugify is completely free and open-source under the LGPL-3.0 license. No payment, no subscription, no account required. Download and use it forever.
What Minecraft versions does Debugify support?
Debugify supports Fabric 1.21.11. It is actively maintained and updated for the latest Minecraft releases by isXander and the contributor community.
Can I configure which bug fixes are enabled?
Yes. Debugify provides a GUI config screen via Mod Menu where you can toggle individual bug fixes on or off. You can also manually edit the JSON config file at .minecraft/config/debugify.json. Modpack authors can default new fixes to disabled.
Does Debugify work on servers?
Yes. Debugify includes both client-side and server-side bug fixes. When installed on a server, server-side fixes apply to all connected players. Server fixes also apply in singleplayer when installed on the client.
What mods does Debugify replace?
Debugify consolidates 12+ single-fix mods including BetterShields, Shift-Scroll Fix, ForgetMeChunk, ChunkSavingFix, No Telemetry, ToolTipFix, Title Fix Mod, Entity Collision FPS Fix, Skeleton Aiming Fix, and more. These mods can still be used alongside Debugify without conflicts if desired.
Is Debugify safe to use in modpacks?
Yes. Debugify is modpack-friendly and includes a config option that defaults new bug fixes to disabled. This means modpack authors have full control over which fixes are active and won't be surprised by new fixes added in updates.