World Mirror
by billstark001
Players who want a local copy of a multiplayer or Realms world can use World Mirror, a Fabric client mod that records the parts of a world the client sees.
What it does
World Mirror records the chunks a client receives while a player explores, and writes them to a local singleplayer save that can be loaded later. Recording starts after the player presses P on joining a world, and it runs in the background unless automatic export is switched off in the settings. Pressing O exports the data captured so far, and the export can be started at once, with a completion message shown when it finishes. Clearing the cache with L deletes mirror files already written to disk. Only the client saves information, so no server-side installation is needed, and the mod can be used on Realms, on multiplayer servers and in singleplayer worlds.
Mirrors of saved copies made from other players' worlds are created by default, and a map inside the mod marks which chunks are recorded and where conflicts remain. Per-world save location and conflict strategy can be set, and each conflict is resolved by picking one strategy from a list. The controls are rebound under Options, Controls, World Mirror. World Mirror is open source under the MIT License and requires Fabric API. It is published for 26.3 with the 0.4.6+26.3-fabric file, and its files cover 1.21.11, 26.1.2, 26.2 and 26.3.
Key features
Background recording
Chunks the client receives are recorded continuously as the player moves through the world, until automatic export is disabled.
Export on demand
Pressing O writes the data already captured to a local save, and the export can start at once or after the current work finishes.
Recorded chunk map
A map inside the mod shows recorded chunks and conflicts, with drag to pan, mouse wheel zoom and hover for coordinates and source.
Conflict handling
Each conflict between a received chunk and a stored one is resolved by picking a strategy from a selection list, set separately for each world.
Cache clearing
Pressing L deletes the mirror files already written to disk, so a fresh recording can start.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
Rearview Mirror Mod is client-side only, open source under the MIT License and published for 1.21.11. World Downloader uses the MIT License without being open source, targets 1.21 – 1.21.10 and is client required with server optional. Simple Blueprints is also client-side only and open source under the MIT License, covering 1.21.11 – 26.3, so it fits the same version range.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| World Mirror | Fabric | 1.21.11 – 26.3 | Client-side only | 2026-10-04 |
| Rearview Mirror Mod | Fabric | 1.21.11 | Client-side only | 2026-06-25 |
| World Downloader | Fabric | 1.21 – 1.21.10 | Client required, server optional | 2025-10-16 |
| Simple Blueprints | Fabric | 1.21.11 – 26.3 | Client-side only | 2026-09-23 |
Questions
Does the server need World Mirror installed?
Does World Mirror require Fabric API?
Which Minecraft versions does World Mirror support?
In the catalog
World Mirror is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 8,071 mods support Minecraft 26.3.
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What the author says
World Mirror is a client-side Fabric mod that saves the parts of a Minecraft world your client can see, then turns them into a local singleplayer save. It works on multiplayer servers, Realms, and singleplayer worlds; the server does not need to install anything. Use it to archive a build, keep a personal record of…
Official listing
- Modrinth page
- modrinth.com/mod/world-mirror
- Owner
- billstark001
- Published
- 2026-03-08
- Updated on Modrinth
- 2026-10-04
- Facts verified
- 2026-10-15