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StressmarkMinecraft mod for 1.21.11

Real-time server performance grading and stress testing for Minecraft servers. Spawn fake players, monitor key metrics, and discover exactly how many players your hardware can handle.

server onlynewest supported release 1.21.11OptimizationManagement
Latest version
1.4.0
Minecraft
1.21 to 1.21.11
Java
Java 21+
Loaders
NeoForge, Fabric
Licence
Apache-2.0
Downloads
1.3k
Updated
4 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Stressmark servers

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

  • 1.21.11
  • NeoForge
  • Fabric
  • 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 Stressmark declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.11NeoForge, Fabric21+declared9 Dec 2025
1.21.10NeoForge, Fabric21+declared7 Oct 2025
1.21.9Fabric, NeoForge21+declared30 Sept 2025
1.21.8NeoForge, Fabric21+declared17 Jul 2025
1.21.7NeoForge, Fabric21+declared30 Jun 2025
1.21.6Fabric, NeoForge21+declared17 Jun 2025
1.21.5NeoForge, Fabric21+declared25 Mar 2025
1.21.4Fabric, NeoForge21+declared3 Dec 2024
1.21.3Fabric, NeoForge21+declared23 Oct 2024
1.21.2NeoForge, Fabric21+declared22 Oct 2024
1.21.1NeoForge, Fabric21+declared8 Aug 2024
1.21Fabric, NeoForge21+declared13 Jun 2024

Download

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

Most recently published release

1.4.0release22 Jun 2026

stressmark-fabric-1.21.11.jar · 0.1 MB · for 1.21.11 · Fabric

Download this release
6fc358cf299c…
Older versions6
  • 1.3.217 Jun 20261.21.1160 KB15 downloads5d51f58b5902…Get
  • 1.3.117 Jun 20261.21.1160 KB6 downloadsd31cd8dcaba7…Get
  • 1.3.017 Jun 20261.21.1160 KB6 downloadsec7d938d2632…Get
  • 1.2.017 Jun 20261.21.1159 KB9 downloads0b159844caeb…Get
  • 1.1.011 Feb 20261.21.1158 KB23 downloads12cc9335ded4…Get
  • 1.0.010 Feb 20261.21.1141 KB13 downloads68a4cd19bef4…Get

Frequently asked

Does Stressmark work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version Stressmark 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 Stressmark support?

Everything the author has declared, from 1.21 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 Stressmark on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which platform or loader does Stressmark support?

NeoForge, 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 Stressmark?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is Stressmark under?

Apache-2.0, 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 Stressmark?

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 Stressmark 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. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

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

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.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)Collective🎓 Collective is a shared library with common code for all of Serilum's mods.

Details from Modrinth, where the author last updated it on 22 Jun 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .