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World In a JarMinecraft mod for 1.21.1

(Snowglobe) A terrarium-inspired block made for builders and survival players alike.

client and servernewest supported 1.21.1TechnologyStorageDecorationMagic
Latest version
1.0.0-beta.9+1.21.1
Minecraft
1.19.2 to 1.21.1
Java
Java 21+
Loaders
Fabric, Quilt
Licence
LGPL-3.0-only
Downloads
15.2k
Updated
11 mo ago
Available on
Modrinth
Space NodeOur hosting

Host World In a Jar servers

One click and World In a Jar is installed with the right loader, on hardware built for it.

  • 1.21.1
  • Fabric
  • Quilt
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version World In a Jar declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, Quilt21+declared8 Aug 2024
1.20.1Fabric, Quilt17+declared12 Jun 2023
1.19.4Fabric, Quilt17+declared14 Mar 2023
1.19.2Fabric, Quilt17+declared5 Aug 2022

Download

From World In a Jar’s own host. Nothing is re-hosted here.

1.0.0-beta.9+1.21.1alpha21 Oct 2025

worldinajar-1.0.0-beta.9+1.21.1.jar · 0.3 MB · for 1.21.1

Download latest
4460af335d73…
Older versions22
  • 1.0.0-beta.7+1.21.1.blanketcon30 Mar 20251.21.10.3 MB430 downloads501bd1b1622b…Get
  • 1.0.0-beta.6+1.21.1.blanketcon30 Mar 20251.21.10.3 MB123 downloadsf306bcf3d5a0…Get
  • 1.0.0-beta.5+1.21.1.blanketcon29 Mar 20251.21.10.3 MB135 downloads0fbfd70b6b60…Get
  • 1.0.0-beta.4+1.21.1.blanketcon27 Mar 20251.21.10.3 MB191 downloads9eb1f70d2e15…Get
  • 1.0.0-beta.3+1.21.116 Mar 20251.21.10.3 MB1.0k downloads22f51d357efc…Get
  • 1.0.0-beta.2+1.21.116 Mar 20251.21.10.3 MB188 downloads9160923d21b0…Get
  • 1.0.0-beta.1+1.21.116 Mar 20251.21.10.3 MB118 downloadsf29978abce1c…Get
  • 1.0.0-beta.0+1.219 Feb 20251.21.10.3 MB323 downloads73a8e0a0a8f7…Get
  • 0.3.0+1.20.12 Aug 20231.20.10.2 MB3.6k downloadsb9ca292c642a…Get
  • 0.2.0+1.20.11 Aug 20231.20.10.1 MB272 downloads41117ced7c5d…Get
  • 0.2.0-rc.2+1.20.112 Jul 20231.20.10.1 MB303 downloads1ab8e14b9567…Get
  • 0.2.0-rc.1+1.20.112 Jul 20231.20.10.1 MB222 downloadsb33d0598c441…Get
  • 0.2.0-pre.1+1.20.111 Jul 20231.20.10.2 MB225 downloads7f935da52e36…Get
  • 0.1.8+1.19.424 Mar 20231.19.40.3 MB353 downloads94fcb31a401e…Get
  • 0.1.7+1.19.2-MODFEST.818 Sept 20221.19.20.4 MB1.1k downloadse76e513c6085…Get
  • 0.1.6+1.19.2.MODFEST.716 Sept 20221.19.20.4 MB241 downloads025a5d01c0de…Get
  • 0.1.5-1.19.2+MODFEST.69 Sept 20221.19.20.4 MB303 downloadsc355577514c3…Get
  • 0.1.4-1.19.2+MODFEST.53 Sept 20221.19.20.4 MB311 downloads5f20946d9b01…Get
  • 0.1.3-1.19.2+MODFEST.429 Aug 20221.19.20.4 MB291 downloadsbbeb768c976c…Get
  • 0.1.2-1.19.2+MODFEST.327 Aug 20221.19.20.4 MB252 downloads9476bda89a49…Get
  • 0.1.126 Aug 20221.19.20.4 MB362 downloads979b412cb41e…Get
  • 0.1.021 Aug 20221.19.20.4 MB294 downloadse83b638599fc…Get

Frequently asked

Does World In a Jar work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version World In a Jar declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does World In a Jar support?

Everything the author has declared, from 1.19.2 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install World In a Jar on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does World In a Jar support?

Fabric, Quilt. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for World In a Jar?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is World In a Jar under?

LGPL-3.0-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install World In a Jar?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download World In a Jar safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Details from Modrinth, where the author last updated it on 21 Oct 2025. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .