Disable Portal Checks
by soronto
Disable Portal Checks removes a collision check that Mojang added to nether portals in 1.19.3, which can slow servers that move many mobs.
What it does
Since 1.19.3, a mob passing through a nether portal is checked for suffocation at its arrival position and moved to a clear spot if needed. Before that version, mobs were sent through without this search. On the other side, large mobs can be placed inside a suffocating block, and the search for a clear position is computationally expensive. Servers with many mobs travelling through portals can see a significant increase in lag from this work.
Disable Portal Checks turns the check off on the server, so mobs use the older behaviour. The change applies only to the server side and needs Fabric API installed beside it. The mod is released under the MIT License and is not open source. Files are published for Fabric only, across 26 release versions 1.19.3 – 26.3, with 1.0.0 for 26.3 as the latest file, first published and last updated on 2024-01-08.
Key features
Portal check removal
Skips the suffocation check that runs when a mob comes through a nether portal.
Lag reduction on busy servers
Cuts the work done for each transported mob, which matters where large numbers of mobs cross portals.
Server-only install
Only the server needs the mod, so players join without installing anything.
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.x7 of 7 versions with builds
1.19.x2 of 2 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Busy multiplayer servers
Servers where many mobs cross nether portals each minute can lower the cost of each transfer.
Farm-heavy worlds
Worlds with large mob farms that rely on portal travel may see less lag from portal transfers.
Who it’s for: Server owners running Fabric who see lag from mobs moving through nether portals, and who accept the older portal behaviour that comes with the check removed.
How it compares
EndPortalRenderFix is a client-side Fabric mod, released under the MIT License and open source, for 1.21.1 – 26.1.2; it works on the end portal rendering, not on mob transfer. Optimized Dragon Respawn is server-side only and open source under the GNU Lesser General Public License v3.0 only, for 1.14.4 – 1.19.4, and it changes dragon respawning. Panda Anti-Lag is server-side only, open source under the CC0 1.0 Universal license, and covers 1.21.4 – 26.3, so it targets a different part of server load.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Disable Portal Checks | Fabric | 1.19.3 – 26.3 | Server-side only | 2024-01-08 |
| EndPortalRenderFix | Fabric | 1.21.1 – 26.1.2 | Client-side only | 2026-05-21 |
| Optimized Dragon Respawn | Fabric | 1.14.4 – 1.19.4 | Server-side only | 2023-06-14 |
| Panda Anti-Lag | Fabric | 1.21.4 – 26.3 | Server-side only | 2026-10-08 |
Questions
Does Disable Portal Checks need Fabric API?
Do players need to install Disable Portal Checks?
Which game versions have files for this mod?
In the catalog
Disable Portal Checks is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 8,071 mods support Minecraft 26.3.
Similar mods
What the author says
Disable unnecessary portal checks that cause lag. NOTE: I have verified the mod works for versions 1.19.3 - 26.3. It is simple enough that it will most likely work in future versions, but it may take me a while to get around to testing it and updating the versions. If you want to force it to work in an untested…
Official listing
- Modrinth page
- modrinth.com/mod/disable-portal-checks
- Owner
- soronto
- Published
- 2024-01-08
- Updated on Modrinth
- 2024-01-08
- Facts verified
- 2026-10-15