IG: Stack Size Adjuster
- By
Stack Size Adjuster grants you full authority over item stack limits. Scale weapons, armor, blocks, and consumables dynamically at runtime.
Come on
Create your game server with 
📦 Stack Size Adjuster
“Unshackle Your Inventory. Configurable Stack Limits with High-Performance Drop Protection & Dynamic Font Scaling.”
📖 Introduction
Minecraft's standard 64-item stack ceiling was established over 15 years ago when the game had only a handful of blocks and crafting recipes. In modern survival, building large structures, massive terraforming projects, or sorting large storage rooms turns inventory management into a chore of dozens of chests and endless hauling trips.
Stack Size Adjuster solves the inventory bottleneck under the Instant Gratification design philosophy. It dynamically expands item stack limits server-wide across natural item categories (64-stack items, 16-stack items, and 1-stack items) with real-time network synchronization, client-side auto-scaling numbers, and container drop lag prevention.
1 Jar 1 Version Policy: I build 1 dedicated JAR for each Minecraft version (e.g. 1.20.1, 1.21.1, 1.21.11, 26.1.2, 26.2, 26.3+). Please download the exact build that matches your Minecraft installation.
Server & Client Architecture: Install on the server (or singleplayer world) to enable custom stack logic. Clients with the mod installed will benefit from dynamic font auto-scaling in inventory slots and instant GameRule sync!
Part of the Instant Gratification Collection — mods designed to streamline your gameplay and respect your time.
✨ Features
🚀 Category-Based Stack Expansion
- 64-Stack Items (Default: 128): Expands building blocks, ores, ingots, wood, and standard resources up to any integer limit.
- 16-Stack Items (Default: 32): Expands utility items that naturally cap at 16 (ender pearls, snowballs, buckets, signs, eggs) without breaking their identity.
- 1-Stack Items (Default: 1): Kept at 1 by default to ensure tools, weapons, and armor retain standard behavior. Server owners can uncap this category at any time if desired.
- Uncapped Freedom: Supports stack sizes up to 2,147,483,647 (Integer.MAX_VALUE), adhering to the Freedom Over Anti-Crash design principle.
🛡️ Container Drop Lag Protection
- Breaking a chest containing thousands of items in vanilla would normally spawn hundreds or thousands of individual item entities, creating severe TPS drops or client stutter.
- Cluster Drop System: Intelligently groups dropped items into a controlled number of item entities per inventory slot (governed by
max_drop_entities, default 8), preserving full item quantities while keeping server performance smooth.
🔤 Dynamic Inventory Font Scaling
- Numbers with 3, 4, or more digits (like 128, 999, or 9999) normally overflow outside the 16x16 inventory slot boundary.
- The client-side renderer calculates text width and dynamically scales down high-count numbers so they fit cleanly and legibly inside the item slot.
⚡ Real-Time Network Sync & Container Refresh
- Stack limits synchronize automatically via custom network payloads whenever a player joins or an admin changes GameRules.
- Open container and inventory screens immediately refresh with the updated limits without requiring a server reboot or player relog.
🧩 Addon Ecosystem Compatibility
- Built-in API hooks allow specialized companion mods to register dedicated per-item overrides:
- Potion Stacker Addon: Stacks drinkable, splash, and lingering potions, water bottles, and stews.
- Stew Stacker Addon: Stacks mushroom stews, rabbit soups, beetroot soups, and suspicious stews.
⚙️ Native GameRules & Configuration
Stack limits can be adjusted in real time using vanilla GameRules:
| GameRule Key | Type | Default | Valid Range | Description |
|---|---|---|---|---|
stack-size-adjuster:items_64_limit |
Integer |
128 |
1 – 2,147,483,647 |
Maximum stack size for items that naturally stack to 64. |
stack-size-adjuster:items_16_limit |
Integer |
32 |
1 – 2,147,483,647 |
Maximum stack size for items that naturally stack to 16. |
stack-size-adjuster:items_1_limit |
Integer |
1 |
1 – 2,147,483,647 |
Maximum stack size for items that naturally stack to 1. |
stack-size-adjuster:max_drop_entities |
Integer |
8 |
1 – 64 |
Maximum item entities spawned per slot when a container breaks. |
🖥️ In-Game Configuration Screen (ModMenu & YACL)
If ModMenu and YetAnotherConfigLib (YACL) are installed, you can configure these options directly from the client title screen or mods menu:
- Config file:
config/stack-size-adjuster.json(acts as baseline defaults for newly generated worlds).
☕ Support & Creator Community
I am an independent solo developer creating lightweight, vanilla-enhancing mods. If Stack Size Adjuster makes your survival experience more enjoyable, consider supporting future development:
🇮🇩 Indonesian Local Payment Note: Indonesian supporters can support my work directly via Saweria or SocioBuzz using GoPay, OVO, Dana, QRIS, LinkAja!
Join my official Discord community for development updates, test builds, and feedback:
- 💬 Discord Community: https://discord.gg/EV99bgAFqb
📜 Metadata & Permissions
| Property | Value |
|---|---|
| Mod Name | Stack Size Adjuster |
| Namespace / Mod ID | stack-size-adjuster |
| License | GNU General Public License v3.0 (GPLv3) |
| Side Safety | Server & Client (Network Synchronized) |
| Required Dependencies | Fabric API, Dasik Library |
| Optional Dependencies | ModMenu, YetAnotherConfigLib (YACL) |
| Source Code | GitHub Repository |
| Issue Tracker | GitHub Issues |
📦 Modpack Permissions & Distribution:
You are fully welcome to include this mod in any modpack! The mod file must be downloaded directly through official distribution channels (Modrinth or CurseForge). Re-uploading or mirroring the JAR to third-party scraper sites or unauthorized launchers is strictly prohibited.⚖️ License & Fork Guidelines (No Zero-Change Re-uploads):
This project is open-source under the GNU GPLv3. You are free to inspect the code, learn from it, and fork it for genuine modifications or substantial feature additions under GPLv3 with proper attribution.
Straight 1:1 re-uploads, clone forks without meaningful functional additions, or re-publishing identical builds under different project names are strictly forbidden.
Made with ❤️ for the Minecraft community
Part of the Instant Gratification Collection
IG: Stack Size Adjuster Team
