File Copier
File Copier lets server owners copy selected files from an existing world into newly created worlds, and it is server-side only.
What it does
The mod copies chosen files into new worlds, so a server can start a fresh world that already carries data packs, custom NPC data and other world-level files. Copying runs only for worlds that are new, and an option keeps existing worlds untouched. Hash-based updates rely on MD5 hashing, so only files that have changed are copied again.
Because the environment is server-side only, players join without installing anything, and the mod can run on a Fabric, Forge or NeoForge server. Files are published for 1.20.1 and for 1.21.1 – 1.21.11, under the MIT License, and the source code and issue tracker are public. Released builds cover 1.20.1 – 1.21.11, with the latest Fabric and Forge files at 1.0.2 for 1.20.1 and the latest NeoForge file at 1.0.2 for 1.21.11.
Key features
Selective file copying
Only chosen files are copied from a source world into a new world, leaving the rest of the data alone.
Data pack and mod data transfer
Data packs and data from other mods can be carried into new worlds through the copy step.
Hash-based updates
MD5 hashes identify changed files, so unchanged files are skipped on later copies.
Existing world option
A setting limits copying to new worlds, so worlds already in use are not overwritten.
Worldgen on first chunks
Custom biomes, structures and worldgen features are generated in the initial terrain, so they appear around the spawn point.
Compatibility
Latest build for each game version and loader.
1.21.x11 of 11 versions with builds
1.20.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Preparing a server world
A server owner can build a template world with the right data packs and settings, then copy those files into each new world the server creates.
Who it’s for: Server owners who create new worlds often and want the same data packs or mod data in each one.
How it compares
Item Info Copier is a client-side only Fabric mod under the MIT License, with files for 1.20.1 – 1.20.4, so it works on the player's side instead of the server. Copy World runs on client and server and loads on Fabric and Quilt for 1.19.3 – 1.20.1, which covers an older range than File Copier. NBT Copier is a Forge mod for 1.7.10 that runs on client and server, so it does not overlap with File Copier's current versions.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| File Copier | Fabric, Forge and NeoForge | 1.20.1 – 1.21.11 | Server-side only | 2025-12-24 |
| Item Info Copier | Fabric | 1.20.1 – 1.20.4 | Client-side only | 2026-01-19 |
| Copy World | Fabric and Quilt | 1.19.3 – 1.20.1 | Client and server | 2023-07-14 |
| NBT Copier | Forge | 1.7.10 | Client and server | 2026-05-24 |
Questions
Does File Copier need to be installed on player clients?
Which loaders does File Copier support?
Does copying overwrite an existing world?
In the catalog
File Copier is one of 4,058 Storage mods on ModsFinder, and one of 2,474 Storage mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
A modern continuation of the Copy-Paste / Copied mods for automatic world data syncing. A Minecraft mod for Fabric and NeoForge that copies files from config/copy/ into newly created worlds.
Official listing
- Modrinth page
- modrinth.com/mod/file-copier
- Owner
- TheOneTrueDev
- Published
- 2025-12-20
- Updated on Modrinth
- 2025-12-24
- Facts verified
- 2026-10-15