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Player Highlighter

A lightweight client-side Fabric mod that highlights players with a glowing outline while a designated key is held or a toggle is enabled, without relying on any server-side mechanics.

Overview

Player Highlighter improves player visibility by showing a glowing outline around other players while the hold key is pressed (default: TAB) or when the highlight toggle is enabled. The effect is purely visual, handled entirely on the client, and can be either momentary or persistent based on user preference.

When neither the hold key is pressed nor the toggle is enabled, all outlines disappear immediately.

Key Features

Glowing outline appears while holding the configured key or when keep mode is enabled
HUD icons show on-screen indicators for other players in view when highlighting is active
Optional toggle mode for persistent highlighting (default key: I)
No screen clutter when inactive
Purely client-side and visual-only
Does not modify real player states or effects
No commands, no packets, no gameplay changes
Safe for multiplayer servers
Lightweight with negligible performance impact

Visual Behavior

Other players are rendered with a glowing outline similar to the vanilla Glowing effect
The local player is never highlighted
Outline visibility is controlled by:
- Holding the highlight key (default: TAB), or
- Enabling keep mode via the toggle key (default: I)
When active, small HUD icons appear on screen to indicate player positions in view
Outline color follows vanilla rules (default or team-based, if applicable)
No impact on mobs or non-player entities

Multiplayer Safety

Client-side only
No server interaction
No packets intercepted or sent
No risk of desynchronization
Compatible with vanilla and modded servers

Supported Versions

Minecraft 1.21.11
Fabric Loader 0.18+
Fabric API
Java 21

License

MIT