portalextras

Portals in portalextras are customizable and work somewhat like an unstable universe gateway: each one is set up with its own destination and mode. The Overworld mode teleports given players to exact coordinates in the Overworld, such as 143 85 4321, and the X, Y and Z values must be exact. The Nether mode works the same way but uses literal Nether coordinates, unlike vanilla Nether portals, which apply 1:8 scaling. Coordinates in the Overworld and Nether ones are both written in full.

A third mode sends a player to another online player. The target player is named, and an offset places the arrival point a set number of blocks ahead of them in a chosen direction. Setting safeSpawn to true makes the mod search for the nearest block that is safe and does not suffocate the player, so arrivals avoid terrain that would trap them. It defaults to false, so the option has to be turned on. The blocksInFront setting controls how many blocks ahead of the target the player appears.

The mod runs on the server alone and needs Fabric API. Players join without installing anything, and only the server owner configures and places the portals. Files are published for Fabric, for 26.1.2 and 1.21.11 in the current build line, and the source code is available under the GNU General Public License v3.0 only, which makes the mod open source.