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RFTools BuilderMinecraft mod for 1.21.1

RFTools addon mod adding the builder, shield system and much more

client and servernewest supported 1.21.1Technology
Latest version
1.21-7.0.5
Minecraft
1.14.4 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge
Licence
MIT
Downloads
276.4k
Updated
21 d ago
Available on
Modrinth
Space NodePartner

Host RFTools Builder servers

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

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

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.20.1NeoForge, Forge17+declared12 Jun 2023
1.19.4Forge, NeoForge17+declared14 Mar 2023
1.19.3NeoForge, Forge17+declared7 Dec 2022
1.19.2NeoForge, Forge17+declared5 Aug 2022
1.19.1NeoForge, Forge17+declared27 Jul 2022
1.19NeoForge, Forge17+declared7 Jun 2022
1.18.2NeoForge, Forge17+declared28 Feb 2022
1.18.1NeoForge, Forge17+declared10 Dec 2021
1.16.5NeoForge, Forge8+declared14 Jan 2021
1.16.4Forge, NeoForge8+declared29 Oct 2020
1.16.3NeoForge, Forge8+declared10 Sept 2020
1.16.2NeoForge, Forge8+declared11 Aug 2020
1.15.2NeoForge, Forge8+declared17 Jan 2020
1.14.4NeoForge, Forge8+declared19 Jul 2019

Download

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

All 60 releases
1.21-7.0.5beta16 Jun 2026

rftoolsbuilder-1.21-7.0.5.jar · 1.0 MB · for 1.21.1

Download latest
496088861935…
Older versions24
  • 1.20-6.0.916 Jun 20261.20.11.0 MB12.6k downloads6d7df8cfbad9…Get
  • 1.21-7.0.42 Dec 20251.21.10.9 MB12.3k downloads17cce9b918ef…Get
  • 1.21-7.0.325 May 20251.21.10.9 MB8.1k downloadsf560b879295e…Get
  • 1.21-7.0.216 Mar 20251.21.10.9 MB1.8k downloadscac6759f52fa…Get
  • 1.21-7.0.110 Dec 20241.21.10.9 MB1.8k downloads8b43e6ae4687…Get
  • 1.21-7.0.04 Dec 20241.21.10.9 MB169 downloads5746a447f247…Get
  • 1.20-6.0.89 Sept 20241.20.10.9 MB74.2k downloads19247f06df7b…Get
  • 1.20-6.0.77 Sept 20241.20.10.9 MB215 downloadsffd17dd75da1…Get
  • 1.20-6.0.65 Sept 20241.20.10.8 MB155 downloadsffc8e20fc8b8…Get
  • 1.19-5.2.1027 Apr 20241.19.2, 1.19.3, 1.19.40.8 MB58.8k downloadsfa22240fb424…Get
  • 1.20-6.0.523 Apr 20241.20.10.8 MB5.7k downloads25cb1a44106c…Get
  • 1.18-4.1.421 Jan 20241.18.20.7 MB2.4k downloads0ad14eaba6b7…Get
  • 1.19-5.2.921 Jan 20241.19.2, 1.19.3, 1.19.40.8 MB500 downloadsa170f7401215…Get
  • 1.20-6.0.421 Jan 20241.20.10.8 MB10.7k downloadsef881a385be9…Get
  • 1.20-6.0.324 Dec 20231.20.10.8 MB1.8k downloads910e882dda79…Get
  • 1.20-6.0.219 Nov 20231.20.10.8 MB2.9k downloadsd49921cb6089…Get
  • 1.20-6.0.111 Sept 20231.20.10.8 MB12.9k downloadsb7c1c18737b4…Get
  • 1.20-6.0.020 Jun 20231.20.10.8 MB2.3k downloadsf694e7158b87…Get
  • 1.18-4.1.31 May 20231.18.20.7 MB2.0k downloads9f73c51e65f9…Get
  • 1.19-5.2.81 May 20231.19.2, 1.19.3, 1.19.40.8 MB26.7k downloadsed0fc7477d7d…Get
  • 1.19-5.2.730 Apr 20231.19.2, 1.19.3, 1.19.40.8 MB132 downloadsaf913f7e2878…Get
  • 1.18-4.1.230 Apr 20231.18.20.7 MB131 downloads8ade7f4b353e…Get
  • 1.19-5.2.610 Apr 20231.19.2, 1.19.3, 1.19.40.8 MB147 downloadsc6fa167342e7…Get
  • 1.19-5.2.54 Apr 20231.19.2, 1.19.3, 1.19.40.8 MB107 downloadsd406b8ffeda2…Get

Frequently asked

Does RFTools Builder work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version RFTools Builder 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 RFTools Builder support?

Everything the author has declared, from 1.14.4 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 RFTools Builder 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 loader does RFTools Builder need?

NeoForge, Forge. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for RFTools Builder?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the mod itself.

What licence is RFTools Builder 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 RFTools Builder?

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 RFTools Builder safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

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

BookshelfAn open source library for other mods!GeckoLibA 3D animation library for entities, blocks, items, armor, and more!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.

Last checked 18 d ago against Modrinth. 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? .