String Duper
by TrickoMods
String Duper restores classic tripwire string duping on Fabric and Forge servers, using a controlled, tick-based system.
What it does
Tripwire farms in String Duper run on a fixed tick schedule. A farm only runs when its water setup is valid and its structure passes checks, which keeps the server from processing broken or accidental setups. Activation needs a player within 64 blocks, so farms far from anyone stay idle and add no load.
The mod is a server-side only mod: players join without installing anything, and only the server runs it. Its server-side processing is deterministic, so a given farm behaves the same way each time. Builds exist for Fabric and Forge, and the same mod is also published for Paper, Spigot and Purpur server platforms.
Files cover 1.21 – 26.3 across 17 release versions, with 1.0.3 as the latest file for Fabric and for Forge. The code is not open source; All rights reserved applies.
Key features
Tick-based tripwire duping
Classic tripwire string duplication runs on a controlled tick schedule, so output stays predictable on busy servers.
Structure and overlap checks
Strict structure validation and overlap-aware detection let several farms share a server without invalid or excessively dense layouts.
Configurable farm limits
Server owners can cap the number of active farms and tune how the mod spawns items.
Reduced entity physics lag
Optimized item spawning and fewer unnecessary entities reduce the physics load that farms would otherwise add.
Gallery
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x12 of 12 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Multiplayer servers
Server owners run tripwire farms with limits on how many can be active at once, and the 64-block activation keeps distant farms idle.
Who it’s for: Server owners who want classic string duplication on a controlled, lag-conscious system. Players only need a vanilla client to use farms on a server that runs the mod.
How it compares
No Duping is server required with an optional client, under a Creative Commons Attribution Non Commercial Share Alike 4.0 license, and is not open source. It is published for 1.21.6 – 1.21.11 on Fabric, Forge, NeoForge and Quilt.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| String Duper | Fabric and Forge | 1.21 – 26.3 | Server-side only | 2026-09-20 |
| No Duping | Fabric, Forge, NeoForge and Quilt | 1.21.6 – 1.21.11 | Server required, client optional | 2026-06-28 |
Questions
Does String Duper need to be installed on clients?
Which loaders does String Duper support?
Which game versions have files?
In the catalog
String Duper is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 8,071 mods support Minecraft 26.3.
More from TrickoMods
Similar mods
What the author says
Your support helps us keep our projects alive and improving. StringDuper is a server-friendly string duplication system designed for stable and predictable farming. It uses structure validation and optimized server-side processing to maintain consistent behavior while reducing unnecessary entity and physics load.
Official listing
- Modrinth page
- modrinth.com/mod/string-dupe
- Owner
- TrickoMods
- Published
- 2026-03-16
- Updated on Modrinth
- 2026-09-20
- Facts verified
- 2026-10-15