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Debugify Reforge project artwork

CurseForge · Minecraft mod

Debugify Reforge

Debugify is a Forge 1.20.1 port of isXander's Debugify mod that fixes bugs from the Minecraft bug tracker, with smart detection that skips fixes already applied by Forge or other mods.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Debugify Reforge release should I use?

Updated today
Latest stable file debugify-1.21.1+1.1.jar
Game version 1.21.1
Loader NeoForge

Debugify Reforge debugify-1.21.1+1.1.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.

Where it goes

Is Debugify Reforge required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release NeoForge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

Understand client and server requirements Read the Minecraft installation guide

What else does Debugify Reforge debugify-1.21.1+1.1.jar need?

debugify-1.21.1+1.1.jar. Change the file and its required mods may change too.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add Debugify Reforge without breaking your instance.

Built for Debugify Reforge debugify-1.21.1+1.1.jar. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use debugify-1.21.1+1.1.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    This file does not list any required mods. Do not add a library just because a different file uses it.

  3. 03

    Put it on the correct side

    The project page does not say whether this file belongs on the client, dedicated server, or both.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside debugify-1.21.1+1.1.jar. It opens that exact file at the source.

About this project

What does Debugify Reforge add?

Debugify (Forge 1.20.1)

A Forge port of isXander's Debugify for Minecraft 1.20.1. Debugify fixes bugs found on the Mojang bug tracker that Mojang hasn't gotten around to fixing yet — improving gameplay stability, multiplayer fairness, and quality of life without changing core game mechanics.

Features

  • 70+ bug fixes from the Mojang bug tracker, organized into two categories:
    • Basic Fixes — Safe, non-intrusive bug fixes that don't alter gameplay balance (e.g. chunk saving, cross-dimensional teleport effects, spectator mode edge cases, RCON formatting, combat tracking).
    • Gameplay Fixes — Fixes that change gameplay mechanics and may provide an advantage in multiplayer. Disabled by default in multiplayer via the "Enable In Multiplayer" toggle.
  • Smart conflict detection — Automatically skips fixes that have already been applied by Forge or other mods, preventing crashes and redundant patches. The startup log reports how many fixes were applied, skipped, or failed.
  • Works on both sides — Install on a dedicated server to fix server-side bugs for all connected players, and/or on the client to fix client-side rendering, UI, and input bugs. Client and server can run independently without requiring each other.
  • In-game configuration screen — A Forge-native config screen accessible from the mod list, letting you toggle individual fixes on or off without editing JSON files.
  • Mod compatibility — Detects and avoids conflicts with other mods that fix the same bugs (Carpet, ChunkSavingFix, No Telemetry, flwr-8187, and more).
  • Persistent configuration — Settings are saved to config/debugify.json and persist across restarts.

Installation

  1. Install Minecraft Forge 47.x for Minecraft 1.20.1.
  2. Place the debugify-1.20.1+1.0.jar file in your .minecraft/mods folder (client) or mods/ folder (server).
  3. Launch the game. The mod works out of the box with sensible defaults.

Server installation: Drop the jar in your server's mods/ folder. Server-side fixes (32 mixins) apply automatically to all connected players. No client-side installation required for server fixes.

Client installation: Drop the jar in your client's mods/ folder. Client-side fixes (38 mixins) apply on top of vanilla behavior. A config screen is available from the Mods menu.

Requirements

  • Minecraft 1.20.1
  • Forge 47.x (tested on 47.4.10)
  • Java 17

Credits

  • Original mod: isXander — Debugify (Fabric, upstream archive/1.20 branch)
  • Forge port: MikihinaSann
  • Code used under LGPLv3: j-Tai's TieFix, FlashyReese's Sodium Extra
  • Code used under Zlib: Ampflower's 2x2 Surrounded Saplings Fix (MC-8187)

License

LGPLv3 — see LICENSE.txt

Project description from CurseForge.

Pick your setup

Debugify Reforge by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

2 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Debugify Reforge versions and loaders

3 of 3 releases match

Looking for an older file? The official CurseForge project page is in Resources.