Data Packs Quality of Life

Mega Stacks – Make stack size up to 99 for every item!

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Compatibility
Minecraft 1.21
to version
Minecraft 26.1
Changes include
  • Functions
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sniffercraft34
Lvl 78Legendary Mythical Sniffer
604
This is a data pack that makes every single item be stackable up to 99!
You can go mining, exploring or more with a much more organised inventory since slots now hold 30% more items and blocks!
This even works with items that can only be stacked to less than 64, like doors and swords.
I was going to make it so that all items went up to the 32-bit integer limit (2147483647), but Minecraft's vanilla mechanics only allow you to modify stack limit up to 99 :(
Note that only items that have been picked up/been in entity format can stack higher than 64! Getting items straight from the creative inventory or /give will make them have their old limits until dropped and picked up again!
Also note that if you don't have the strongest processor and have too many big items could cause lag! Regardless of your PC, I recommend allocating at least 4GB of RAM to Minecraft if possible (I would only advise you to do that if you have 8GB+ memory)
If you want to add some items that can't be stacked to 99 go to data/mega_stacks/tags/item/not_valid.json and edit the file.
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Issue Tracker

2 Update Logs

Update #2 : by sniffercraft34 05/14/2026 11:22:00 amMay 14 @ 3:22 pm UTC

Updated to the 26.1 versions
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  Have something to say?

EmeraldKinq
05/14/2026 12:52 pm
Level 37 : Artisan Procrastinator Waffle
You should make it 128 for a clean double.

this is also ticking me off because it's not a proper integer.
2
sniffercraft34
05/14/2026 1:50 pm
He/Him • Level 78 : Legendary Mythical Sniffer
You can't go past 99 :(
2
EmeraldKinq
05/14/2026 1:51 pm
Level 37 : Artisan Procrastinator Waffle
Oh nooooooooooooo DX
2
IXFYADX
05/14/2026 11:29 am
Level 50 : Grandmaster Aesthetic Aesthetic
HOW!
2
Adronyus
02/18/2026 5:34 am
Level 44 : Master Warrior Builder
so its bad idea to run in on SMP server?
2
sniffercraft34
02/18/2026 10:40 am
He/Him • Level 78 : Legendary Mythical Sniffer
Hmm... Depends on how good the server/computer running the SMP is
1
Adronyus
02/18/2026 11:11 am
Level 44 : Master Warrior Builder
15 people 8GB ram AMD Ryzen 9 5950X
2
sniffercraft34
02/19/2026 9:38 am
He/Him • Level 78 : Legendary Mythical Sniffer
Hmmm
I'm not sure, it could depending on how many items the people hold
If you do plan to install it maybe use a different server as a test just to make sure, you wouldn't want to lose the SMP
2
A Very Fishy Fish
12/05/2025 5:27 pm
Level 47 : Master System
how do you make them
2
sniffercraft34
12/06/2025 4:21 am
He/Him • Level 78 : Legendary Mythical Sniffer
how do you stack them? the items must have been in entity form before being picked up (just drop the stack on the ground)
1

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