ModsFinder

Client Build Tools

by kvxd

Client Build Tools is a Fabric client utility that places lines of blocks for building, with three build modes that players can switch between.

FabricClient-side onlyGNU General Public License v3.0 or laterOpen source1.21.1 – 1.21.4

What it does

Client Build Tools provides client-side building assistance. It places horizontal lines and vertical lines of blocks, and it patches holes around the player while building. Holding Shift and scrolling the mouse cycles the build mode, and the mode settings include a length and height range that can be adjusted per mode.

The mod needs Cloth Config API and Kotlin in addition to Fabric. Only the client needs it, so servers run without it. The author notes that many servers treat the mod as cheating and that using it on those servers can lead to experience punishment, so players should check a server's rules before installing it. Files target 1.21.1 and 1.21.4, and the code is open source under the GNU General Public License v3.0 or later.

Key features

  1. Horizontal line building

    Places a row of blocks along a horizontal line from the player's position for quick flat construction.

  2. Vertical line building

    Places a column of blocks along a vertical line, which suits walls, pillars and shafts.

  3. Hole patching

    Fills gaps in the blocks around the player, so a surface can be closed up while the player builds.

  4. Three build modes

    Three core modes are available, and each has its own settings for length and height range.

  5. Quick mode switching

    Holding Shift and scrolling the mouse changes the length and height range without opening a menu.

Compatibility

Latest build for each game version and loader.

1.21.40.2.0+mc1.21.4
1.21.10.2.0+mc1.21.1
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 2

KO
KotlinSummary not published
Required
Cloth Config APIConfiguration Library for Minecraft Mods
Required

How it compares

Full comparison

Horizontal Scrolling Fix is a Fabric client-side mod for 1.21.11, released under the Creative Commons Attribution Share Alike 4.0 license and not open source. QuickMate is a Fabric and NeoForge mod for 1.21.5 – 1.21.8 that runs on client and server, and it is open source under the Apache License 2.0.

ModLoadersGame versionsEnvironmentUpdated
Client Build ToolsFabric1.21.1 – 1.21.4Client-side only2025-10-13
Horizontal Scrolling FixFabric1.21.11Client-side only2026-06-01
QuickMateFabric and NeoForge1.21.5 – 1.21.8Client and server2026-05-27

Questions

Does Client Build Tools need Cloth Config API?

Yes. Cloth Config API is a required dependency and must be installed alongside the mod, together with Kotlin.

Does the server need Client Build Tools installed?

No. Servers do not need it; each player installs it for their own game.

Can Client Build Tools be used on any server?

The author notes that many servers consider the mod cheating and may apply experience punishment, so server rules should be checked first.

In the catalog

Client Build Tools 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.

Utility mods36,990Fabric modsMods for 1.21.417,979

More from kvxd

All projects
Simple Soundboard1.21.10 – 26.2Carbonfast1.21.4 – 26.1.2Faster Block Entities26.1.2 – 26.2TooltipETA1.21.11 – 26.1.2Meo's BetterRailPlacement1.21.1

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What the author says

CBT is considered cheating on many servers due to the nature of the mod. You may experience punishment for using this mod on servers! Currently, there are 3 core modes featured in CBT: - Line: Builds a horizontal line of blocks - Wall: Builds a vertical line of blocks - Patcher: Patches holes around the player
kvxd, on the Modrinth page

Official listing

Owner
kvxd
Published
2025-10-12
Updated on Modrinth
2025-10-13
Facts verified
2026-10-15

Tags

Utility
Open on ModrinthCompare