BlockHighlight
by Botato
BlockHighlight lets players mark block coordinates in the world with colored, see-through borders, all managed through an in-game interface.
What it does
Marked positions are drawn on the client only, so each player sees their own highlights while the server knows nothing about them. A dedicated edit mode turns left-clicks into placements: a click on a block sets a colored highlight on it instead of breaking it, and a second click on the same block removes the mark. Leaving edit mode returns normal play while the highlights stay visible, and a chat message confirms each switch. The mod is useful for noting trap mechanisms or planned block placements in a build.
Markers are stored per dimension, so a mark made in one dimension does not show up in another. The mod runs on Fabric for 1.21.11 and is open source under the MIT License.
Key features
Colored block markers
Selected blocks are outlined with custom highlight borders that remain visible through walls.
Marker Manager screen
A split-panel screen lists the highlighted blocks, where each marker can be viewed and given its own color.
HSV color picker
The color picker offers a full hue, saturation and value selector with a hex input for exact shades, and colors can be saved as presets.
Settings panel
A right-side panel changes the default highlight color, adjusts background blur strength, manages saved presets and resets settings to defaults.
HUD toggle
A key press hides or shows the highlights on the HUD without changing the saved markers.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players who build in survival or creative and want to annotate blocks in their own world without changing anything on a server.
Questions
Does BlockHighlight need to be installed on the server?
Are the markers shared with other players?
Which loader does BlockHighlight use?
In the catalog
BlockHighlight is one of 12,078 Decoration mods on ModsFinder, and one of 6,982 Decoration mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from Botato
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What the author says
Selected block coordinates can be marked client-side with custom highlights, borders, and a see-through display—all easily managed via an intuitive in-game GUI. It's useful for marking locations, mechanical traps, or block placements. Press I to toggle edit mode. While active, left-clicking any block will place a…
Official listing
- Modrinth page
- modrinth.com/mod/blockhighlight
- Owner
- Botato
- Published
- 2026-07-01
- Updated on Modrinth
- 2026-07-01
- Facts verified
- 2026-10-15