NearByAlert
by MineBoost
With NearByAlert installed, a player walking within 150 blocks of another player gets an on-screen warning showing that player's name and the direction they are coming from.
What it does
Detection runs on the client, and the alert needs a line of sight to the other player, so a wall between them stops the warning. Players within the 150-block radius are shown as a list on screen, and when several are nearby the display cycles through them every 5 seconds to keep the screen readable.
The mod is a single Fabric mod, built for version 1.21.11 and the 12 release versions covering 1.21 – 1.21.11. Only the client needs it, and servers can run without it. The code is under the Creative Commons Attribution 4.0 license and is not open source, though public links exist for the source code and issue tracker.
Key features
Proximity detection
Other players within 150 blocks are detected and listed in the warning area, without any command or setup.
Direction arrow
An arrow rotates with the camera to point toward each detected player, so the direction stays readable while turning.
Distance-based colors
Alerts shift color with distance: red for 0–30 blocks and yellow for 31–75 blocks.
Quick toggle
Pressing K turns the alert display on or off during play.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x12 of 12 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Multiplayer servers
On a shared server, players can see who is approaching without watching the minimap or chat.
Exploring with friends
Groups that split up in a large world can track each other's positions from a distance.
Who it’s for: Players on Fabric who want a warning when other players come close. Servers do not need the mod to be installed.
Questions
Does NearByAlert need to be installed on the server?
Why does a player behind a wall not trigger an alert?
Which game versions does NearByAlert support?
More from MineBoost
What the author says
NearbyAlert is a lightweight client-side Fabric mod that warns you when other players are close. When a player enters a 150-block radius, a clean on-screen alert appears showing their name and the direction they’re coming from. If multiple players are nearby, NearbyAlert intelligently cycles through them so your…
Official listing
- Modrinth page
- modrinth.com/mod/nearbyalert
- Owner
- MineBoost
- Published
- 2026-01-07
- Updated on Modrinth
- 2026-01-07
- Facts verified
- 2026-10-15