Outlined
Outlined, a Fabric client mod for Minecraft 1.21 – 1.21.4, lets players change how entity and block entity hitboxes are drawn.
What it does
The mod adds customization of hitbox outlines, the lines drawn around entities so their collision area is visible. Entity hitbox outlines can be shown, and block entity hitbox outlines can be switched off. The colour and transparency of block entity outlines can be adjusted to suit the look a player wants.
Outlined requires Cloth Config API and Fabric API, both of which must be installed next to the mod. Its options are reached through Mod Menu, and settings are saved in the config folder of the Minecraft files, where players can change them directly. Because the mod is client-side only, only the client needs it and a server can run without it.
Files are published for Fabric only, across five game versions, with 1.0.0 for 1.21.4 as the latest build from 2026-01-07. The mod is released under All rights reserved and is not open source.
Key features
Entity hitbox outlines
Outlines are drawn around entities, showing the area each one uses for collision and interaction.
Block entity outline toggle
Hitbox outlines for block entities can be disabled, so chests and similar blocks are drawn without them.
Outline colour and transparency
The colour and transparency of block entity outlines can be set, so the overlay can be made more or less prominent.
Mod Menu options screen
Settings are grouped in a screen opened from Mod Menu, with no need to edit files for common changes.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Debugging entity collision
Players who build mechanics or test redstone around mobs can see exactly where each entity's hitbox sits.
Cleaner block views
Players who find block entity outlines distracting can turn them off or make them fainter while building.
Who it’s for: Players who want to see hitboxes while playing single-player or joining a server, and builders who check entity and block entity collision areas.
How it compares
Custom Hitboxes is a Fabric mod for 1.21 – 26.3 released under the MIT License, and it is open source. Better Hitboxes is a client-side only Fabric mod for 1.21 – 1.21.8 under All rights reserved, and it is not open source. Outlined is client-side only, is under All rights reserved and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Outlined | Fabric | 1.21 – 1.21.4 | Client-side only | 2026-01-07 |
| Custom Hitboxes | Fabric | 1.21 – 26.3 | Not published | 2026-10-09 |
| Better Hitboxes | Fabric | 1.21 – 1.21.8 | Client-side only | 2025-09-13 |
Questions
Does Outlined need Cloth Config API?
Do servers need Outlined installed?
Where are Outlined's settings stored?
Which game versions does Outlined support?
In the catalog
Outlined is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 17,979 mods support Minecraft 1.21.4.
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What the author says
These features can be customized using Mod Menu. (Requires Cloth Config) If you don't have either of the required mods for configuration, you can check inside the
Official listing
- Modrinth page
- modrinth.com/mod/outlined
- Owner
- BreakableBrick
- Published
- 2026-01-06
- Updated on Modrinth
- 2026-01-07
- Facts verified
- 2026-10-15