Copy block（复制方块）
by liyueovo
With Copy block, a batch of blocks can be copied and removed in one action, and a history system lets recent changes be undone or redone.
What it does
Two functional blocks handle repetitive construction: one copies blocks inside a chosen area, and the other deletes blocks within a specified area and cleans up the result. Both are tied to related logic, so a builder sets the area once and the operation runs without manual clearing.
The history system keeps a record of recent edits. Undo and redo are available, and a one-click recovery option restores changes after an error. A logic lock guards against accidental triggers. The default setting keeps a 20-second undo window, and players who need more time can adjust the profile to lengthen it.
The mod runs on the client and on the server, so both sides need it. It is published for Fabric, Forge and Quilt, with builds covering 1.12.2 – 26.3. The code is released under the MIT License, and the project is not open source. Public links exist for an issue tracker.
Key features
Batch block copying
Blocks inside a selected area can be copied in a single operation, which speeds up repeated builds.
Area deletion
The delete block clears blocks within a specified area automatically, removing a region in one step.
Undo and redo history
Recent edits are recorded so they can be reverted or reapplied, with a 20-second undo window by default.
Recovery with a logic lock
A one-click recovery restores changes after a mistake, and the logic lock prevents accidental triggers.
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x11 of 11 versions with builds
1.20.x6 of 6 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
1.17.x2 of 2 versions with builds
1.16.x2 of 2 versions with builds
1.12.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Build undo is a Fabric-only mod for 1.21.11 with all rights reserved, and it is not open source. Effortless Structure is open source under the GNU Lesser General Public License v3.0 only and covers 1.17.1 – 1.21.3 on Fabric, Forge, NeoForge and Quilt. Undo, open source no, is licensed under Creative Commons Attribution Non Commercial Share Alike 4.0 and covers 1.21.1 – 26.2.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Copy block（复制方块） | Fabric, Forge and Quilt | 1.12.2 – 26.3 | Client and server | 2026-09-22 |
| Build undo | Fabric | 1.21.11 | Client and server | 2026-05-21 |
| Effortless Structure | Fabric, Forge, NeoForge and Quilt | 1.17.1 – 1.21.3 | Client and server | 2025-02-09 |
| Undo | Fabric and Quilt | 1.21.1 – 26.2 | Client and server | 2026-08-05 |
Questions
Does Copy block need to be installed on both sides?
Which loaders does Copy block support?
How long can changes be undone by default?
In the catalog
Copy block（复制方块） is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 8,071 mods support Minecraft 26.3.
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Official listing
- Modrinth page
- modrinth.com/mod/copyblock
- Owner
- liyueovo
- Published
- 2026-02-09
- Updated on Modrinth
- 2026-09-22
- Facts verified
- 2026-10-15