SkinBlocker
by Matthew81
SkinBlocker, a Fabric client mod for 1.21.4, hides player skins and usernames that its owner considers inappropriate.
What it does
Matthew81's SkinBlocker lets a player choose which other players' skins and usernames should be replaced on their own screen. A blocked skin is swapped for the default Steve skin, and a blocked username is shown as a hashcode instead of its real text. Matching can be made by UUID, by skin texture URL or by name, so a blocked player is still hidden if they change their account details.
Username blocking uses regular expression matching, so a single pattern can catch several names at once. For example, a block on the word Mustard also hides a name such as MangoMustard. Blocked players stay hidden and the replacement display uses a numbered label, so the game remains playable while the entries are in effect. The mod is released under the MIT License and is open source, with its source code published.
The mod is Client-side only, so players install it on their own game and servers do not need it. Files are published for Fabric, with version 1.0.0 for 1.21.4 as the latest build, first released on 2026-07-01 and last updated on 2026-07-11.
Key features
Skin blocking by player
Other players' skins can be blocked, and a blocked skin is replaced with the default Steve skin.
Skin texture URL and UUID matching
Blocks can match a skin's texture URL or a player's UUID, so a blocked skin stays hidden even if it is changed.
Username blocking with regex
Usernames can be matched with regular expressions, letting one pattern hide several related names.
Hashcode display for usernames
A blocked username is replaced with a hashcode, so the real name is not shown on screen.
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 on Fabric 1.21.4 who want to hide specific skins or usernames in their own game view. It is installed by the player and changes only what that player sees.
How it compares
Several catalog mods also deal with skins or player names but in other ways. RJ's Offline Server Skins is open source under the CC0 1.0 Universal license, runs on client and server, and is published for Fabric 1.21.11. Head Above Xp is client-side only, not open source, and covers Fabric 1.21.11 under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| SkinBlocker | Fabric | 1.21.4 | Client-side only | 2026-07-11 |
| RJ's Offline Server Skins | Fabric | 1.21.11 | Client and server | 2026-03-03 |
| Head Above Xp | Fabric | 1.21.11 | Client-side only | 2026-09-11 |
Questions
Does SkinBlocker need to be installed on the server?
Which game version does SkinBlocker support?
Will a blocked player still be hidden after changing their skin?
In the catalog
SkinBlocker is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 17,979 mods support Minecraft 1.21.4.
More from Matthew81
Similar mods
What the author says
This mod allows you to block other players' skins or usernames. If you block someone's skin, their skin will become a Steve skin to you. If you block someone's username, their username will become a hashcode.
Official listing
- Modrinth page
- modrinth.com/mod/skinblocker
- Owner
- Matthew81
- Published
- 2026-07-01
- Updated on Modrinth
- 2026-07-11
- Facts verified
- 2026-10-15