BigInventory

Extended Player Inventory with a Page System (Server + Client)

BigInventory is a modern inventory expansion system for Minecraft 1.21+ that gives players a multi-page inventory — cleanly integrated, performant, and fully server-controlled.

The system consists of:

• 🧩 a Paper server plugin
• 💻 an optional Fabric client mod (for keybind convenience)

Players get a large, page-based inventory without breaking vanilla mechanics or risking item loss.

✨ Features

📦 Multi-Page Inventory

• 54-slot GUI (double chest size)
• Unlimited number of pages
• Automatic page expansion (planned)
• No item loss when switching pages

⬅️➡️ Page Navigation

• Fixed arrow buttons in slot 45 and 53
• Arrows are always visible
• Arrow slots are locked (no item placement)
• Gray arrows when no next/previous page exists
• Fully exploit-safe against:
  • Shift-click
  • Dragging
  • Hotbar swaps

⌨️ Client Keybind (Optional)

• Open BigInventory using a key (default: I)
• Automatically runs /biginv
• No chat spam
• No packet overhead
• Only works if the server plugin is installed

🔐 Server-Side Control

• All items are stored server-side
• No client trust
• No desync
• No dupes
• Safe on disconnects & crashes

💾 Persistent Storage

• Items persist after logout
• Pages persist forever
• Future-ready for:
  • Database support
  • Cloud sync
  • Cross-server networks

🛠 Installation

Server (Required)

1. Download the BigInventory Plugin
2. Put the .jar into your plugins/ folder
3. Restart the server
4. Done! 🎉

Client (Optional – for Keybind)

1. Install Fabric Loader
2. Install Fabric API
3. Put the BigInventory Client Mod into your mods/ folder
4. Start Minecraft
5. Press I to open BigInventory

📌 Commands

⚙️ Configuration (Coming Soon)

Planned options:

• Maximum page count
• Automatic page creation
• Custom page size
• Disable keybind
• Page permissions
• Cooldowns
• GUI page indicator

🔒 Security & Performance

• No client manipulation possible
• No dupe bugs
• No exploits
• Async saving planned
• Extremely low performance impact
• No chunk rendering
• No RAM leaks

📅 Roadmap

Planned features:

• Page indicator (e.g. “Page 2/5”)
• Automatic page creation when inventory is full
• Close button
• Sounds on page switch
• Custom GUI themes
• Cloud sync (e.g. MySQL)
• Cross-server inventories
• Page permissions

❓ FAQ

Does this work without the client mod?

Yes.
Players can use BigInventory via /biginv only.
The client mod is just for convenience (keybind).

Is this cheat-safe?

Yes.
Everything is server-side controlled.
No item duplication.
No desync.
No client trust.

Supported Versions

Minecraft 1.21+
Paper / Purpur
Fabric Client (optional)

🧠 Why BigInventory?

BigInventory is made for servers that:

• Want more inventory space
• Don’t want lag
• Don’t want Pay-to-Win backpack plugins
• Prefer clean vanilla-style integration
• Want future-proof inventory systems

❤️ Credits

• Developer: Jona
• Idea & Architecture: CommunitySMP
• Testing: Chaos, rage & persistence 😭
• Inspiration: Backpack plugins — but better 😤

🧪 Disclaimer

This project is still in active development.
Bugs, balancing changes and feature adjustments may happen.
Feedback & suggestions are always welcome!