ModsFinder

String Dupe 99

by BrickBoyMC

String Dupe 99 is a server-side datapack that lets a single string in a crafting table be duplicated to fill a whole inventory.

FabricForgeNeoForgeQuiltServer required, client optionalAll rights reserved1.21 – 26.2

What it does

Placing one string in the middle slot of a crafting table returns 64 strings, and placing 64 returns the full stack, so a player can fill the inventory from a single item. The effect is delivered as a datapack that works without a separate mod install, and files are also published as mods for Fabric, Forge, NeoForge and Quilt. Only the server has to run the mod, and players may add it on the client. Builds cover 1.21 – 26.2 across 16 release versions, with the latest file for 26.2, and the mod is not open source under All rights reserved.

Key features

  1. Single-string duplication

    One string placed in the middle of a crafting table returns 64 strings.

  2. Full inventory fill

    Repeated crafting from one string fills every empty slot in the inventory.

  3. Datapack delivery

    The datapack version runs the recipe logic without installing a mod file.

Compatibility

Latest build for each game version and loader.

26.x4 of 4 versions with builds
26.21.0+mod1.0+mod1.0+mod1.0+mod
26.1.21.0+mod1.0+mod1.0+mod1.0+mod
26.1.11.0+mod1.0+mod1.0+mod1.0+mod
26.11.0+mod1.0+mod1.0+mod1.0+mod
1.21.x12 of 12 versions with builds
1.21.111.0+mod1.0+mod1.0+mod1.0+mod
1.21.101.0+mod1.0+mod1.0+mod1.0+mod
1.21.91.0+mod1.0+mod1.0+mod1.0+mod
1.21.81.0+mod1.0+mod1.0+mod1.0+mod
1.21.71.0+mod1.0+mod1.0+mod1.0+mod
1.21.61.0+mod1.0+mod1.0+mod1.0+mod
1.21.51.0+mod1.0+mod1.0+mod1.0+mod
1.21.41.0+mod1.0+mod1.0+mod1.0+mod
1.21.31.0+mod1.0+mod1.0+mod1.0+mod
1.21.21.0+mod1.0+mod1.0+mod1.0+mod
1.21.11.0+mod1.0+mod1.0+mod1.0+mod
1.211.0+mod1.0+mod1.0+mod1.0+mod
ReleaseBetaAlphaNot available

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

How it compares

Full comparison

Dirt=Diamonds is a mod under the MIT License, published for 1.21.9 – 1.21.10 and not open source; it is needed on the server, with the client optional. Dupe Key is a Fabric-only client mod for 1.21 – 26.1 under All rights reserved and not open source, so only the client needs it.

ModLoadersGame versionsEnvironmentUpdated
String Dupe 99Fabric, Forge, NeoForge and Quilt1.21 – 26.2Server required, client optional2025-12-25
Dupe KeyFabric1.21 – 26.1Client-side only2026-03-27

Questions

Does String Dupe 99 need to be installed on the client?

No. Only the server has to run it; players may leave it out, so the mod works on the server alone.

More from BrickBoyMC

All projects
String Dupe1.21 – 26.2Cheap TNT1.20 – 26.2Coal to Gun Powder1.21 – 26.2Leather From the Dead1.21 – 1.21.11Craft Stairs Right!1.20 – 26.2Brick's Fair Crafting1.21 – 26.2

What the author says

This datapack is simple, place one string the middle of a crafting table and get 64, then place the 64 back in and your whole inventory is filled. The datapack is super lightwieght and has 0 impact on preformance. This datapack is also downloadable as a mod.
BrickBoyMC, on the Modrinth page

Official listing

Owner
BrickBoyMC
Published
2025-12-25
Updated on Modrinth
2025-12-25
Facts verified
2026-10-15
Open on ModrinthCompare