Stack Size Fix
by chililisoup
Stack Size Fix shows the real item count of stacks that exceed the normal limit, so overstacked items from old worlds or servers can be read correctly.
What it does
The mod makes items with invalid stack sizes visible in the inventory, which is useful when a world saved on an older version holds stacks that the game since 1.20.5 no longer allows. Players can see the actual count instead of a misleading value. A server that sends invalid item stack sizes, as some Hypixel GUIs do, can be read the same way. Shulker boxes receive the same treatment, and the mod runs on the client alone, so servers do not need it.
Stack Size Fix is published for Fabric and NeoForge, with builds for 1.20.5 – 26.3 and the latest files for 26.3. Its code is released under the CC0 1.0 Universal license, so it is open source. Users who want a single mod that covers shulker boxes should compare it with other fixes, since some of them cover only part of the problem.
Key features
Visible overstacked counts
Item stacks with invalid sizes display their true count, so the number matches what the stack holds.
Old world compatibility
Overstacked items saved before 1.20.5 keep their actual quantity in view after the update.
Shulker box handling
Stacks inside shulker boxes are covered too, so their contents read correctly.
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x12 of 12 versions with builds
1.20.x2 of 2 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
In the catalog
Stack Size Fix is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 8,071 mods support Minecraft 26.3.
More from chililisoup
Similar mods
What the author says
Makes item counts for items with invalid stack sizes visible. Useful for playing old worlds on newer versions, where you might have "overstacked" items, but since 1.20.5 you haven't been able to see their actual count when they're not in your inventory.
Official listing
- Modrinth page
- modrinth.com/mod/stacksizefix
- Owner
- chililisoup
- Published
- 2025-05-15
- Updated on Modrinth
- 2026-04-01
- Facts verified
- 2026-10-15