Menu

modpack

Developer ToolkitMinecraft modpack for 1.21.11

A developer toolkit modpack with a collection of useful utilities and game optimizations. Works out of the box - Developer's Toolkit by @JosTheDude

client onlynewest supported 1.21.11TechnologyOptimizationLightweightMultiplayer
Latest version
1.4.0-1.21.11
Minecraft
1.21.1 to 1.21.11
Java
Java 21+
Loader
Fabric
Licence
BSD-3-Clause
Downloads
1.7k
Updated
17 d ago
Available on
Modrinth

Screenshots

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

Minecraft versions

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

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Fabric21+declared9 Dec 2025
1.21.10Fabric21+declared7 Oct 2025
1.21.8Fabric21+declared17 Jul 2025
1.21.5Fabric21+declared25 Mar 2025
1.21.4Fabric21+declared3 Dec 2024
1.21.1Fabric21+declared8 Aug 2024

Download

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

1.4.0-1.21.11release14 Jan 2026

Dev-Toolkit-1.21.11-1.4.0.mrpack · 1.4 MB · for 1.21.11

Download latest
68fe7330c531…
Older versions11
  • 1.3.1-1.21.1028 Oct 20251.21.101.4 MB206 downloadse968be293e44…Get
  • 1.3.1-1.21.828 Oct 20251.21.81.3 MB64 downloads6999841631b9…Get
  • 1.3.026 Oct 20251.21.101.3 MB87 downloads2cc92e93f0e1…Get
  • 1.2.121 Jun 20251.21.510.4 MB185 downloads2889684e2be1…Get
  • 1.2.020 Jun 20251.21.510.4 MB36 downloadsc6932eaec5c4…Get
  • 1.1.328 Feb 20251.21.46.8 MB212 downloads403f20263643…Get
  • 1.1.221 Feb 20251.21.412.7 MB44 downloadscab37447c6c4…Get
  • 1.1.118 Feb 20251.21.412.7 MB51 downloads5793168a3285…Get
  • 1.0.319 Dec 20241.21.16.8 MB210 downloads232add2dac2b…Get
  • 1.0.225 Nov 20241.21.16.8 MB97 downloads60074ebff5fd…Get
  • 1.0.125 Nov 20241.21.16.8 MB42 downloads419f97a1a1bb…Get

Frequently asked

Does Developer Toolkit work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version Developer Toolkit 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 Developer Toolkit support?

Everything the author has declared, from 1.21.1 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Developer Toolkit on the client or the server?

The client only. There is nothing to install on the server side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

Which platform or loader does Developer Toolkit support?

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 Developer Toolkit?

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

What licence is Developer Toolkit under?

BSD-3-Clause, 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 Developer Toolkit?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download Developer Toolkit 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.

MAX FPS: Optimized🚀 MAX FPS WITHOUT UNNECESSARY MODS! Only 16 optimization mods - NOTHING EXTRA! ✅ ALL MAJOR VERSIONS ⚡ INSTALLS ON ANY LAUNCHER! (Guide below)PacktrixPre-packed Official Modpack containing Patrix Resource Pack for easy install using Fabric/Quilt.Simply Optimized ReloadedAn unofficial port of Simply Optimized built to support every major mod loader and stay current with the newest versions of Minecraft.ElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 ✔fps+pvpFPS + PvP Boost is a lightweight Minecraft modpack designed to maximize performance and give players a competitive edge in PvP. With FPS-boosting optimizations and combat-focused tweaks, it delivers smoother gameplay, better responsiveness, and enhanced viPhoton OptimizationMinecraft optimization framework prioritizing performance, simplicity, and compatibility. 1.7.10-26.1.2 across Fabric, Forge, NeoForge, and Quilt!

Last checked 17 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? .