# ✦ Probably Backpacks ✦
### Tiered Backpack System with Upgrades for Spigot & Paper
[](https://modrinth.com/plugin/probablybackpacks)
[](https://www.spigotmc.org/)
[](https://discord.gg/r5YXqgrGya)
[](https://bstats.org/plugin/bukkit/Probably%20Backpacks/29881)
[](https://ko-fi.com/brothergaming52)
**Leather · Copper · Iron · Gold · Diamond · Netherite**
Custom Textures · Upgradeable · 3D Models · CuriosPaper Addon
---
*Think of it as **Sophisticated Backpacks** — but for Paper & Spigot, with 3D models, rich upgrades, and a seamless accessory integration.*
CAUTION
⚠️ NO NEW CONTENT UPDATES FOR THIS VERSION
This standard version of Probably Backpacks is feature-locked and will NOT receive any new content updates or features. It will only receive maintenance updates to maintain compatibility with newer Minecraft/Paper releases.
⚜️ Want new features, security, party storage, and advanced upgrades?
Upgrade to Probably Backpacks Premium on BuiltByBit to get access to:
- 🔑 PIN-Pad Security Locks — Prevent pickpocketing with a 4-digit code GUI
- 👥 Synchronized Party Storage — Link backpacks across teammates in real-time
- 🍳 Smart Auto Smelter — Intelligently route items to furnace/smoker/blast modules
- 🧪 XP Sponge & Auto Repair — Absorb XP orbs and auto-repair durability
- 🛢️ Fluid Tank Upgrade — Store up to 10 buckets of fluid
- ⚡ Auto Sort Upgrade & 🛡️ Whitelist Filters
- 🕵️ Stealth Pickpocketing & 🎨 Custom 3D Cosmetic Skins
👉 Click here to get Probably Backpacks Premium on BuiltByBit!
✦ What is Probably Backpacks? ✦
Probably Backpacks adds a complete tiered backpack system to your Minecraft server. Players craft backpacks from Leather all the way up to Netherite — each tier offering more storage and more upgrade slots.
Backpacks are equipped in the CuriosPaper Back slot and are visible on the player's back as a 3D model! This plugin is a CuriosPaper addon, hooking into the accessory system to provide a seamless experience with custom textures, real-time dyeing, and a powerful upgrade system.
This plugin requires CuriosPaper to function!
🚀 What's New in v2.4
- 📥 Autonomous Pickup Task (
PickupTask): Dedicated background task for the Pickup Upgrade that checks a 1.5-block radius around players to collect nearby item drops directly into active backpack storage (smartly skips duplicate work if MagnetTask is active).
- 🛠️ Modern Paper & 1.21.4+ Version Parsing: Overhauled
VersionUtil with regex matching to support Paper build version strings (e.g., 26.2.build.48-alpha) with automatic fallback to Bukkit.getVersion().
- 🔒 Robust Item & Component Sanitization: Added multi-layered fallback deserialization in
BackpackData to strip unregistered/legacy enchantments and invalid item components cleanly.
- ⚙️ GUI Slot Bounds Protection: Added slot boundary safety checks during inventory click processing.
✦ Features ✦
🎒 Core Backpack System
|
Feature |
Description |
| 🎒 |
6 Backpack Tiers |
Leather → Copper → Iron → Gold → Diamond → Netherite |
| 📦 |
27 to 120 Slots |
Scale from a small pouch to a massive storage vault |
| ⬆️ |
19+ Upgrades |
Crafting, Magnet, Cooking, Anvil, Jukebox, Tool Swapper & more |
| 🎨 |
Real-time Dyeing |
Over 16 colors with live 3D model updates |
| 🧟 |
Mob Drops |
Mobs can spawn wearing backpacks — loot them for extra storage |
| 👀 |
3D Models |
Visible on the player's back with auto-hide when looking down |
| 🔑 |
Hotkey Support |
Open your backpack with a double-sneak combo — no commands needed |
| 🗄️ |
Massive Stacks |
Stack items up to 1024 with Netherite Stack Upgrades |
✦ Backpack Tiers ✦
| Tier |
Slots |
Upgrade Slots |
Key Material |
| 🟤 Leather Backpack |
27 |
1 |
Leather + String + Chest |
| 🟠 Copper Backpack |
45 |
2 |
Copper Ingots + Leather Backpack |
| ⚪ Iron Backpack |
54 |
3 |
Iron Ingots + Copper Backpack |
| 🟡 Gold Backpack |
81 |
4 |
Gold Ingots + Iron Backpack |
| 🔵 Diamond Backpack |
108 |
5 |
Diamonds + Gold Backpack |
| 🟣 Netherite Backpack |
120 |
6 |
Smithing Table + Netherite Ingot |
Each tier requires the previous backpack as an ingredient — creating a natural progression chain!
✦ Upgrades ✦
Upgrades are placed into the backpack's upgrade slots to grant powerful abilities:
🛠️ Utility Upgrades
| Upgrade |
Effect |
| 🔧 Crafting Station |
Open a portable crafting table from within your backpack |
| 🔨 Anvil Upgrade |
Portable anvil for repairing items on the go |
| 🎵 Jukebox Upgrade |
Play music discs directly from your backpack |
| 🛠️ Smithing Upgrade |
Portable smithing table for gear progression |
| ⚔️ Tool Swapper |
Automatically swaps to the best tool for the block you're mining |
🧺 Automation Upgrades
| Upgrade |
Effect |
| 📥 Pickup Upgrade |
Dedicated background task (PickupTask) that collects dropped items within a 1.5-block radius into your backpack |
| 🧲 Magnet Upgrade |
Pull nearby items directly into your backpack |
| 🍖 Feeding Upgrade |
Auto-feed the player using food stored in the backpack |
| 🔄 Refill Upgrade |
Auto-refill hotbar items from the backpack as they are used |
| 📦 Compacting Upgrade |
Automatically compress items into blocks (e.g. Iron Ingots → Iron Block) |
🍳 Cooking Upgrades
| Upgrade |
Effect |
| 🔥 Smelting Upgrade |
Portable furnace that smelts items while you walk |
| 💨 Blasting Upgrade |
High-speed smelting for ores |
| 🍖 Smoker Upgrade |
Rapid cooking for food items |
🗄️ Storage Upgrades
| Upgrade |
Effect |
| 🛠️ Upgrade Base |
The fundamental component used to craft all other upgrades |
| 🟠 Copper Stack |
Increases max stack size of items in the backpack to 96 |
| ⚪ Iron Stack |
Increases max stack size of items in the backpack to 128 |
| 🟡 Gold Stack |
Increases max stack size of items in the backpack to 256 |
| 🔵 Diamond Stack |
Increases max stack size of items in the backpack to 512 |
| 🟣 Netherite Stack |
Increases max stack size of items in the backpack to 1024 |
✦ Dyeing & Mobs ✦
🎨 Dyeing System
Express yourself with over 16 unique colors! Leather backpacks can be dyed directly within the backpack inventory.
- Simple Dyeing: No complex GUIs! Simply drop any Minecraft dye onto the dye button in the backpack interface.
- Remove Color: Use a Water Bucket on the dye button to clear the color.
- Live Updates: The 3D model on your back updates instantly when you change the color.
🧟 Mob Drops
Backpacks aren't just for players anymore! Zombies and Skeletons have a small chance to spawn wearing a backpack.
- Visual Models: You can see exactly which tier of backpack a mob is wearing.
- Lootable: Defeat the mob for a chance to collect their backpack!
- Configurable: Adjust spawn rates and which tiers mobs can carry in the
config.yml.
✦ Recipes ✦
🎒 Backpack Recipes (click to expand)
|
### 🟤 Leather Backpack
**Slots:** 27 · **Upgrade Slots:** 1
The starting tier backpack. Requires basic materials to craft.
| | | |
|:---:|:---:|:---:|
| String | Leather | String |
| String | Chest | String |
| Leather | Leather | Leather |
|
|
### 🟠 Copper Backpack
**Slots:** 45 · **Upgrade Slots:** 2
An upgrade from leather — requires copper ingots and a Leather Backpack.
| | | |
|:---:|:---:|:---:|
| Copper Ingot | Copper Ingot | Copper Ingot |
| Copper Ingot | 🟤 Leather Backpack | Copper Ingot |
| Copper Ingot | Copper Ingot | Copper Ingot |
|
|
|
### ⚪ Iron Backpack
**Slots:** 54 · **Upgrade Slots:** 3
Solid mid-tier storage. Requires iron ingots and a Copper Backpack.
| | | |
|:---:|:---:|:---:|
| Iron Ingot | Iron Ingot | Iron Ingot |
| Iron Ingot | 🟠 Copper Backpack | Iron Ingot |
| Iron Ingot | Iron Ingot | Iron Ingot |
|
|
### 🟡 Gold Backpack
**Slots:** 81 · **Upgrade Slots:** 4
High-capacity storage with plenty of room for upgrades.
| | | |
|:---:|:---:|:---:|
| Gold Ingot | Gold Ingot | Gold Ingot |
| Gold Ingot | ⚪ Iron Backpack | Gold Ingot |
| Gold Ingot | Gold Ingot | Gold Ingot |
|
|
|
### 🔵 Diamond Backpack
**Slots:** 108 · **Upgrade Slots:** 5
Premium-tier storage. Only one step away from the ultimate backpack.
| | | |
|:---:|:---:|:---:|
| Diamond | Diamond | Diamond |
| Diamond | 🟡 Gold Backpack | Diamond |
| Diamond | Diamond | Diamond |
|
|
### 🟣 Netherite Backpack
**Slots:** 120 · **Upgrade Slots:** 6
The ultimate backpack. Features fire and lava immunity (won't burn when dropped). Crafted at a **Smithing Table** using the Netherite Upgrade template.
| Component | Item |
|:---|:---|
| **Template** | Netherite Upgrade Smithing Template |
| **Base** | 🔵 Diamond Backpack |
| **Addition** | Netherite Ingot |
|
|
⬆️ Upgrade Recipes (click to expand)
|
### 🛠️ Upgrade Base
The fundamental component for crafting most upgrades.
| | | |
|:---:|:---:|:---:|
| String | Iron Ingot | String |
| Iron Ingot | Leather | Iron Ingot |
| String | Iron Ingot | String |
|
|
### 🔧 Crafting Station
Adds a **portable crafting table** to your backpack.
| | | |
|:---:|:---:|:---:|
| Oak Planks | Crafting Table | Oak Planks |
| Oak Planks | 🛠️ Upgrade Base | Oak Planks |
| Oak Planks | Crafting Table | Oak Planks |
|
|
|
### 📥 Pickup Upgrade
**Auto-collects** picked-up items into the backpack.
| | | |
|:---:|:---:|:---:|
| | Piston | |
| String | 🛠️ Upgrade Base | String |
| Redstone | Redstone | Redstone |
|
|
### 🧲 Magnet Upgrade
**Pulls nearby items** directly into your backpack. Requires the Pickup Upgrade.
| | | |
|:---:|:---:|:---:|
| Ender Pearl | Iron Ingot | Ender Pearl |
| Iron Ingot | 📥 Pickup Upgrade | Iron Ingot |
| Redstone | Diamond | Lapis Lazuli |
|
|
|
### 🍖 Feeding Upgrade
**Auto-feeds** the player using food stored in the backpack.
| | | |
|:---:|:---:|:---:|
| | Golden Carrot | |
| Golden Apple | 🛠️ Upgrade Base | Glistering Melon Slice |
| | Ender Pearl | |
|
|
### 🔄 Refill Upgrade
**Auto-refills** hotbar items from the backpack as they deplete.
| | | |
|:---:|:---:|:---:|
| | Ender Pearl | |
| Iron Ingot | 🛠️ Upgrade Base | Iron Ingot |
| Redstone | Chest | Redstone |
|
|
|
### 📦 Compacting Upgrade
**Auto-compresses** items into their block forms.
| | | |
|:---:|:---:|:---:|
| Iron Ingot | Piston | Iron Ingot |
| Piston | 🛠️ Upgrade Base | Piston |
| Redstone | Piston | Redstone |
|
|
### ⚔️ Tool Swapper
**Auto-swaps** to the best tool for the block you are mining.
| | | |
|:---:|:---:|:---:|
| Redstone | Wood Sword | Redstone |
| Wood Pick | 🛠️ Upgrade Base | Wood Axe |
| Iron Ingot | Wood Shovel | Iron Ingot |
|
|
|
### 🔨 Anvil Upgrade
Adds a **portable anvil** to your backpack.
| | | |
|:---:|:---:|:---:|
| Anvil | Diamond | Anvil |
| Iron Ingot | 🛠️ Upgrade Base | Iron Ingot |
| | Chest | |
|
|
### 🎵 Jukebox Upgrade
**Play music discs** directly from your backpack's GUI.
| | | |
|:---:|:---:|:---:|
| | Jukebox | |
| Iron Ingot | 🛠️ Upgrade Base | Iron Ingot |
| | Redstone | |
|
|
|
### 🛠️ Smithing Upgrade
A portable **Smithing Table** for your backpack.
| | | |
|:---:|:---:|:---:|
| | Smithing Table | |
| Iron Ingot | 🛠️ Upgrade Base | Iron Ingot |
| | Chest | |
|
|
### 🔥 Smelting Upgrade
**Smelts items** automatically while you travel.
| | | |
|:---:|:---:|:---:|
| Redstone | Iron Ingot | Redstone |
| Iron Ingot | 🛠️ Upgrade Base | Iron Ingot |
| Redstone | Furnace | Redstone |
|
|
|
### 💨 Blasting Upgrade
**High-speed smelting** for ores and materials.
| | | |
|:---:|:---:|:---:|
| Redstone | Iron Ingot | Redstone |
| Iron Ingot | 🛠️ Upgrade Base | Iron Ingot |
| Redstone | Blast Furnace | Redstone |
|
|
### 🍖 Smoker Upgrade
**Rapidly cooks food** items while you're on the move.
| | | |
|:---:|:---:|:---:|
| Redstone | Iron Ingot | Redstone |
| Iron Ingot | 🛠️ Upgrade Base | Iron Ingot |
| Redstone | Smoker | Redstone |
|
|
|
### 🟠 Copper Stack Upgrade
**Increases** max stack size in the backpack to **96**.
| | | |
|:---:|:---:|:---:|
| Copper Block | Copper Block | Copper Block |
| Copper Block | 🛠️ Upgrade Base | Copper Block |
| Copper Block | Copper Block | Copper Block |
|
|
### ⚪ Iron Stack Upgrade
**Increases** max stack size in the backpack to **128**.
| | | |
|:---:|:---:|:---:|
| Iron Block | Iron Block | Iron Block |
| Iron Block | 🟠 Copper Stack Upgrade | Iron Block |
| Iron Block | Iron Block | Iron Block |
|
|
|
### 🟡 Gold Stack Upgrade
**Increases** max stack size in the backpack to **256**.
| | | |
|:---:|:---:|:---:|
| Gold Block | Gold Block | Gold Block |
| Gold Block | ⚪ Iron Stack Upgrade | Gold Block |
| Gold Block | Gold Block | Gold Block |
|
|
### 🔵 Diamond Stack Upgrade
**Increases** max stack size in the backpack to **512**.
| | | |
|:---:|:---:|:---:|
| Diamond Block | Diamond Block | Diamond Block |
| Diamond Block | 🟡 Gold Stack Upgrade | Diamond Block |
| Diamond Block | Diamond Block | Diamond Block |
|
|
|
### 🟣 Netherite Stack Upgrade
**Increases** max stack size in the backpack to **1024**.
| | | |
|:---:|:---:|:---:|
| Netherite Block | Netherite Block | Netherite Block |
| Netherite Block | 🔵 Diamond Stack Upgrade | Netherite Block |
| Netherite Block | Netherite Block | Netherite Block |
|
✦ Stats & Support ✦
### Join the Discord!
[](https://discord.gg/r5YXqgrGya)
**[discord.gg/r5YXqgrGya](https://discord.gg/r5YXqgrGya)**
Get help · Report bugs · Suggest features · Stay updated
✦ Geyser & Bedrock Edition Support ✦
Probably Backpacks provides full GUI slot icon and backpack 3D model support for Bedrock Edition players joining via GeyserMC.
- Automatic Setup: If Geyser is running on the same server, Probably Backpacks will automatically detect Geyser's folder on startup, extract the mappings and resource pack, and copy them directly to Geyser's
packs/ and custom_mappings/ folders.
- Manual Setup (Proxy/Separate Server): If Geyser is hosted on a separate proxy (e.g. Velocity/BungeeCord) or automatic setup is skipped:
- Retrieve the files from your server's
plugins/ProbablyBackpacks/geyser/ directory (extracted on startup).
- Copy
ProbablyBackpack_Geyser.zip into your Geyser packs/ folder.
- Copy
ProbablyBackpacks_mappings.json into your Geyser custom_mappings/ folder.
- Ensure
enable-custom-content is set to true in Geyser's config.yml and restart Geyser.
✦ Quick Start ✦
- Download CuriosPaper.jar and ProbablyBackpacks.jar
- Drop both into your server's
plugins/ folder
- Restart the server
- Craft a Leather Backpack and equip it in the CuriosPaper Back slot
- Use the Double-Sneak hotkey — you're all set!
**Made with ❤️ by Brothergaming52**
[Discord](https://discord.gg/r5YXqgrGya) · [Ko-fi](https://ko-fi.com/brothergaming52) · [bStats](https://bstats.org/plugin/bukkit/ProbablyBackpacks/29881) · [CuriosPaper](https://modrinth.com/plugin/curiospaper)
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