
✦ Probably Backpacks ✦
Tiered Backpack System with Upgrades for Spigot & Paper
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.
✦ 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.
[!IMPORTANT] This plugin requires CuriosPaper to function!
🚀 What's New in v2.3
- 🔥 Netherite Backpack Fire/Lava Immunity: Dropped Netherite Backpack item entities are now fully immune to fire and lava damage, preventing your accessories and stored items from burning up.
- 🌐 GeyserMC & Bedrock Support: Fully integrated automatic Bedrock resource pack extraction and custom mappings injection.
- ⚙️ Bug Fixes: Resolved minor model rendering logic loop bypasses on newer server releases.
✦ 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 | Automatically collect picked-up items 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)
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🟤 Leather BackpackSlots: 27 · Upgrade Slots: 1 The starting tier backpack. Requires basic materials to craft.
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🟠 Copper BackpackSlots: 45 · Upgrade Slots: 2 An upgrade from leather — requires copper ingots and a Leather Backpack.
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⚪ Iron BackpackSlots: 54 · Upgrade Slots: 3 Solid mid-tier storage. Requires iron ingots and a Copper Backpack.
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🟡 Gold BackpackSlots: 81 · Upgrade Slots: 4 High-capacity storage with plenty of room for upgrades.
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🔵 Diamond BackpackSlots: 108 · Upgrade Slots: 5 Premium-tier storage. Only one step away from the ultimate backpack.
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🟣 Netherite BackpackSlots: 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.
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⬆️ Upgrade Recipes (click to expand)
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🛠️ Upgrade BaseThe fundamental component for crafting most upgrades.
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🔧 Crafting StationAdds a portable crafting table to your backpack.
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📥 Pickup UpgradeAuto-collects picked-up items into the backpack.
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🧲 Magnet UpgradePulls nearby items directly into your backpack. Requires the Pickup Upgrade.
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🍖 Feeding UpgradeAuto-feeds the player using food stored in the backpack.
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🔄 Refill UpgradeAuto-refills hotbar items from the backpack as they deplete.
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📦 Compacting UpgradeAuto-compresses items into their block forms.
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⚔️ Tool SwapperAuto-swaps to the best tool for the block you are mining.
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🔨 Anvil UpgradeAdds a portable anvil to your backpack.
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🎵 Jukebox UpgradePlay music discs directly from your backpack's GUI.
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🛠️ Smithing UpgradeA portable Smithing Table for your backpack.
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🔥 Smelting UpgradeSmelts items automatically while you travel.
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💨 Blasting UpgradeHigh-speed smelting for ores and materials.
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🍖 Smoker UpgradeRapidly cooks food items while you're on the move.
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🟠 Copper Stack UpgradeIncreases max stack size in the backpack to 96.
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⚪ Iron Stack UpgradeIncreases max stack size in the backpack to 128.
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🟡 Gold Stack UpgradeIncreases max stack size in the backpack to 256.
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🔵 Diamond Stack UpgradeIncreases max stack size in the backpack to 512.
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🟣 Netherite Stack UpgradeIncreases max stack size in the backpack to 1024.
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✦ Stats & Support ✦
✦ 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/andcustom_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.zipinto your Geyserpacks/folder. - Copy
ProbablyBackpacks_mappings.jsoninto your Geysercustom_mappings/folder. - Ensure
enable-custom-contentis set totruein Geyser'sconfig.ymland restart Geyser.
- Retrieve the files from your server's
✦ 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 · Ko-fi · bStats · CuriosPaper
Ченджлог
2.3Релиз26.1, 26.1.1, 26.1.2 · 1 июля 2026 г.
🚀 What's New in v2.3
- 🔥 Netherite Backpack Fire/Lava Immunity: Dropped Netherite Backpack item entities are now fully immune to fire and lava damage, preventing your accessories and stored items from burning up.
- 🌐 GeyserMC & Bedrock Support: Fully integrated automatic Bedrock resource pack extraction and custom mappings injection.
- ⚙️ Bug Fixes: Resolved minor model rendering logic loop bypasses on newer server releases.
2.2Релиз26.1, 26.1.1, 26.1.2 · 12 июня 2026 г.
fixed a critical bug which caused armor and offhand items to be permanently deleted
2.1Релиз26.1, 26.1.1, 26.1.2 · 18 мая 2026 г.
fixed a critical bug which caused armor and offhand items to be permanently deleted
2.0Релиз26.1, 26.1.1, 26.1.2 · 17 мая 2026 г.
🚀 Changelog: Documentation & Recipe Sync
🎨 Dyeing System Overhaul
- Base Colors Refinement: Corrected documentation of maximum colors down to 16 standard colors.
- Dyeing Interaction: Rewrote dyeing instructions to describe dropping dye directly onto the dye slot inside the GUI interface.
- Water Bucket Cleaning: Documented how players can clear a dyed backpack by dropping a Water Bucket onto the dye button.
⬆️ Upgrade Lists & Progression
- Added Upgrade Base: Added the fundamental Upgrade Base component to lists and recipes.
- Stack Upgrades Integration: Fully documented the linear stack tier upgrade path (Copper -> Iron -> Gold -> Diamond -> Netherite) with respective storage limits (96, 128, 256, 512, 1024).
- Utility & automation categories: Structured upgrades into Utility, Automation, Cooking, and Storage classes for a clearer feature outline.
🧪 Crafting & Ingredients Sync (upgrades.yml Alignment)
- Upgrade Base Requirements: Updated standard utility upgrades (Crafting Station, Pickup, Feeding, Refill, Compacting, Anvil, Jukebox, Smithing Table, Smelting, Blasting, Smoker) to require an Upgrade Base in the center grid block.
- Magnet Recipe Fix: Changed the central ingredient from Diamond to Pickup Upgrade to accurately reflect its dependency implementation.
1.2Релиз1.21.9, 1.21.10, 1.21.11 · 7 марта 2026 г.
🎉 Major Update Released
This update focuses on compatibility, performance improvements, and important bug fixes to make the plugin more stable across a wide range of Minecraft versions.
✅ New
- Full support for Minecraft
1.14 – 1.21+The plugin has been updated and tested to work across all supported versions, allowing more servers to use it without compatibility issues.
⚡ Improvements
- Performance optimizations Several internal systems were optimized to improve efficiency and reduce unnecessary processing during gameplay.
🐞 Bug Fixes
- Fixed an issue involving tridents interacting with backpacks.
- Fixed a bug with the Stack Upgrade and Refill Upgrade not behaving correctly in certain situations.
- Fixed problems with shift-click item movement inside backpacks.
A huge thank you to suddenslime4828 for taking the time to report these issues and helping improve the plugin for everyone.
💬 Join the Community
If you encounter bugs, have suggestions, or want to stay updated on future releases, consider joining the community on Discord. Feedback and testing reports help improve the plugin much faster.
Your reports and ideas directly help shape future updates.
1.1Релиз1.21.9, 1.21.10, 1.21.11 · 25 января 2026 г.
✅ ProbablyBackpacks v1.1 – Stability & Quality Update
This update focuses on fixing critical recipe issues and introducing stronger item control to improve server stability and prevent abuse.
🔧 Fixed
- 🛠️ Fixed multiple issues in the recipe system that could cause incorrect crafting behavior and console errors.
- 🪂 Resolved inconsistent recipe registrations and misleading error messages in the console.
➕ Added
🚫 Item Blacklist System
A new blacklist system prevents specific items — including custom items — from being stored inside backpacks.
Important behavior:
- Blocking a custom item will not block its base Minecraft item.
- Example: If an upgrade item based on
Carrot on a Stickis blacklisted, normalCarrot on a Stickitems can still be placed in the backpack — only the custom upgrade item will be blocked.
This allows precise control without breaking vanilla gameplay or other plugins.
❤️ Credits
Huge thanks to Vague Ideas for reporting these issues and helping improve the plugin. Your feedback directly made this update possible.
🧪 Help Improve ProbablyBackpacks
Found a bug, strange behavior, or have a feature idea? Join the Discord and report it. Faster reports = faster fixes.
👉 Join the Discord & help make ProbablyBackpacks better.
1.0Релиз1.21.9, 1.21.10, 1.21.11 · 30 декабря 2025 г.
First Release
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