
DupeItemFixer
Java mod listed for Minecraft 1.21–26.x. Downloads from the MC Java Mods app on Android.
Advanced item duplication detection and prevention for Paper & Folia with intelligent transaction analysis, quarantine, rollback and farm-safe protection.
⬇ Download on Modrinth🛡️ DupeItemFixer
Advanced Item Duplication Detection & Prevention
DupeItemFixer is an advanced, lightweight and farm-safe anti-duplication plugin for Paper and Folia.
It analyzes item transactions, inventory changes, container states and suspicious item-generation patterns to detect potential duplication without blindly deleting legitimate items.
Detect. Analyze. Protect.
⚡ Features
- 🧠 Intelligent duplication detection
- 📦 Inventory & container transaction tracking
- 🔍 Item fingerprinting
- 📊 Confidence-based detection
- 🌾 Farm-safe analysis
- 📦 Shulker/container protection
- 🔄 Rollback-aware detection
- 🛡️ Safe quarantine system
- 🧾 Detailed evidence & case system
- 🧪 Dry-run mode
- 📈 Detection metrics
- 💾 SQLite storage
- ⚡ Lightweight event-driven architecture
- 🌐 Paper + Folia support
🎯 Intelligent Detection
DupeItemFixer does not simply detect large item quantities.
It analyzes:
- Transaction history
- Item source
- Item destination
- Inventory state
- Container state
- Item quantity changes
- Transaction timing
- Repeated patterns
- Legitimate item-generation sources
Detection pipeline:
EVENT ↓ TRANSACTION ANALYSIS ↓ ITEM FINGERPRINT ↓ SOURCE VALIDATION ↓ STATE COMPARISON ↓ PATTERN DETECTION ↓ CONFIDENCE SCORE ↓ CASE ↓ OPTIONAL MITIGATION
📊 Confidence System
0–19 NORMAL
20–39 LOW
40–59 SUSPICIOUS
60–79 HIGH
80–94 VERY HIGH
95–100 CONFIRMED
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as DupeItemFixer-1.0.0.jar — drop this file into the mods folder
- Download size: 20 KB
- Download link checked 22 Oct 2026 — working
These come from our own check of the pack file, not from the source page.