ArcBuilder
by Arcvyon
ArcBuilder is a Fabric mod for 1.20.1 that gives players and server owners tools for clearing, reshaping and building terrain, with a server approval plugin for multiplayer use.
What it does
Its tools act on large areas at once. A selected layer of blocks can be broken down, replaced with a chosen block, or smoothed into a clean surface. Trees, grass, flowers and mobs can be cleared in bulk, leaving nearby structures in place. A block placement range option lets builders work at a distance.
Several options change the world directly. Trees and plants can be grown to full size on placement, the in-game time can be adjusted or stopped, and mobs that cannot normally spawn in daylight can be spawned and removed. Special blocks can be stacked without opening a menu. Each feature is switched on or off with a single button.
ArcBuilder is built on M-Arch Library, which the mod needs to run. Either side can run it, and neither needs it, so it can be installed on a client, a server, or both. Using it on a server requires the ArcEnabler plugin placed in the server's plugins folder. The mod is not open source and is released under All rights reserved. Files exist for 1.20.1 only, with 1.0 as the latest Fabric build, published 2026-02-19.
Key features
Bulk terrain clearing
Trees, leaves, grass and flowers can be removed across large areas in one action, with dedicated modules for each.
Layer replacement and smoothing
Blocks can be broken down to a chosen layer, replaced with a selected block, or levelled into a smooth surface.
Instant plant growth
Trees and crops placed while the option is active appear fully grown, so a planted block can be seen at full size at once.
Mob and time controls
Mobs that normally cannot spawn in daylight can be spawned and removed, villagers and traders can be included, and game time can be sped up or stopped.
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: Creative builders, map makers and server owners who want bulk terrain tools and mob controls on Fabric for 1.20.1. Multiplayer servers need the ArcEnabler plugin before the mod's server features can be used.
Questions
Does ArcBuilder need M-Arch Library?
Does a server need anything extra to use ArcBuilder?
Which game versions does ArcBuilder support?
In the catalog
ArcBuilder is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 34,764 mods support Minecraft 1.20.1.
More from Arcvyon
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What the author says
ArcBuilder is a comprehensive, high-performance feature mod designed for modern Minecraft versions. ArcBuilder is engineered to maximize creativity, efficiency, and user experience.
Official listing
- Modrinth page
- modrinth.com/mod/arcbuilder
- Owner
- Arcvyon
- Published
- 2026-02-11
- Updated on Modrinth
- 2026-02-19
- Facts verified
- 2026-10-15