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JsonPatcherMinecraft mod for 1.21.1

A tool for patching minecrafts json files, without overrding them, using a custom DSL

newest supported 1.21.1UtilityLibraryManagement
Latest version
2.0.0-beta.7+mc.1.21.1
Minecraft
1.20.1 to 1.21.1
Java
Java 21+
Loaders
Quilt, Fabric
Licence
MIT
Downloads
12.3k
Updated
12 mo ago
Available on
Modrinth
Space NodeOur hosting

Host JsonPatcher servers

One click and JsonPatcher is installed with the right loader, on hardware built for it.

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

Minecraft versions

Every version JsonPatcher declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Quilt, Fabric21+declared8 Aug 2024
1.21Quilt, Fabric21+declared13 Jun 2024
1.20.6Fabric, Quilt21+declared29 Apr 2024
1.20.4Quilt, Fabric17+declared7 Dec 2023
1.20.3-pre2Quilt, Fabric17+declared22 Nov 2023
1.20.2Quilt, Fabric17+declared20 Sept 2023
1.20.1Fabric, Quilt17+declared12 Jun 2023

Download

From JsonPatcher’s own host. Nothing is re-hosted here.

2.0.0-beta.7+mc.1.21.1beta24 Sept 2025

JsonPatcher-2.0.0-beta.7+mc.1.21.1.jar · 1.1 MB · for 1.21.1

Download latest
956dcc3ff716…
Older versions17
  • 2.0.0-beta.6+mc.1.21.124 Aug 20251.21.11.1 MB89 downloads6d0b04466b83…Get
  • 2.0.0-beta.5+mc.1.21.124 Aug 20251.21.11.1 MB69 downloads42994acb5e17…Get
  • 2.0.0-beta.4+mc.1.21.128 Mar 20251.21.11.0 MB2.4k downloadsee564cfda29f…Get
  • 2.0.0-beta.3+mc.1.21.124 Mar 20251.21.11.0 MB199 downloads80caf5de1c6b…Get
  • 2.0.0-beta.2+mc.1.21.115 Mar 20251.21.11.0 MB573 downloads14a77a58e90f…Get
  • 2.0.0-beta.1+mc.1.21.115 Mar 20251.21.11.0 MB93 downloads07b0ca450be7…Get
  • 1.1.1+mc.1.21.131 Oct 20241.21.10.7 MB397 downloads338ca5b3f2e7…Get
  • 1.1.0+mc.1.21.110 Aug 20241.21.10.7 MB1.6k downloadsed21550a78a2…Get
  • 1.1.0+mc.1.2128 Jun 20241.210.7 MB327 downloads5fd6ced0a64e…Get
  • 1.0.0+mc.1.20.612 May 20241.20.60.7 MB231 downloadsa0030182c64b…Get
  • 1.0.0-beta.4+mc.1.20.24 Feb 20241.20.20.7 MB185 downloads8817f2b8513a…Get
  • 1.0.0-beta.4+mc.1.20.14 Feb 20241.20.11.5 MB4.9k downloads839c6524d429…Get
  • 1.0.0-beta.4+mc.1.20.44 Feb 20241.20.40.6 MB238 downloads0722e2ee6159…Get
  • 1.0.0-beta.3+mc.1.20.225 Nov 20231.20.3-pre2, 1.20.20.7 MB193 downloadsfcea2d878221…Get
  • 1.0.0-beta.3+mc.1.20.125 Nov 20231.20.11.5 MB266 downloadsdd293896dbb3…Get
  • 1.0.0-beta.2+mc.1.20.125 Nov 20231.20.11.5 MB219 downloads2c5d43fb4b26…Get
  • 1.0.0-beta.1+mc.1.20.115 Nov 20231.20.11.4 MB190 downloadse08e07505e0e…Get

Frequently asked

Does JsonPatcher work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version JsonPatcher 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 JsonPatcher support?

Everything the author has declared, from 1.20.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does JsonPatcher support?

Quilt, Fabric. 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 JsonPatcher?

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 JsonPatcher under?

MIT, 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 JsonPatcher?

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 JsonPatcher 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 24 Sept 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? .