HitboxBackport
A small Mixin-type mod to backport sneaking through 1.5 block tall spaces from minecraft 1.13 and higher versions.
Screenshots
About this Mod
Hitbox Backport
A small Mixin-type mod to backport sneaking through 1.5 block tall spaces from minecraft 1.13 and higher versions.
The Minecraft 1.13 update included a change to the players hitbox when sneaking, allowing players to sneak under top slabs into 1.5 block tall spaces, this change was part a larger movement change for swimming, crawling and sneaking. This mod uses mixins to vanilla Minecraft's code to backport this change to sneaking to 1.12.2.
- REQUIRES A MIXIN LOADER (Like MixinBooter)
If you find any issues or bug in the mod, please report them on the GitHub issues page!
Authors note: While there are a few mods that backport 1.13 swimming, crawling and sneaking in its entirety, i noticed that there werent any mods that backported just the sneak mechanic. As such i made this mod for those who are just looking for this feature.
Available Versions
How to Install HitboxBackport on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set forge Loader
In the panel under "Egg", select the forge loader and matching Minecraft version (1.12.2).
Install Mod
Open the mod browser in the dashboard and search for "HitboxBackport". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.12.2
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
HitboxBackport server crashes on startup – what to do?
Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.12.2). You can switch loaders with one click in the panel.
Is HitboxBackport compatible with forge?
HitboxBackport officially supports forge for Minecraft 1.12.2. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with HitboxBackport – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if HitboxBackport consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Install HitboxBackport with just one click on your server.