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ObservableMinecraft mod for 1.21.4

See what's lagging your server.

client and servernewest supported 1.21.4UtilityOptimization
Latest version
5.4.4+neoforge
Minecraft
1.16.5 to 1.21.4
Java
Java 21+
Loaders
Fabric, NeoForge, Quilt, Forge
Licence
MPL-2.0
Downloads
1.4M
Updated
15 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Observable servers

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

  • 1.21.4
  • Fabric
  • NeoForge
  • Quilt
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.4Fabric, NeoForge, Quilt, Forge21+declared3 Dec 2024
1.21.1Fabric, Quilt, NeoForge, Forge21+declared8 Aug 2024
1.21Fabric, Quilt, NeoForge, Forge21+declared13 Jun 2024
1.20.1Forge, Quilt, NeoForge, Fabric17+declared12 Jun 2023
1.19.3NeoForge, Fabric, Forge, Quilt17+declared7 Dec 2022
1.19.2Fabric, Quilt, NeoForge, Forge17+declared5 Aug 2022
1.18.2Forge, Quilt, NeoForge, Fabric17+declared28 Feb 2022
1.18.1Forge, Quilt, NeoForge, Fabric17+declared10 Dec 2021
1.16.5Forge, Quilt, NeoForge, Fabric8+declared14 Jan 2021

Download

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

All 30 releases
5.4.4+neoforgebeta26 Jun 2025

observable-5.4.4.jar · 0.4 MB · for 1.21.1

Download latest
e594ed3a4a21…
Older versions24
  • 5.4.4+fabric26 Jun 20251.21.10.4 MB41.4k downloadsb1d1b7c44ac3…Get
  • 7.4.4+neoforge8 Apr 20251.21.40.4 MB314 downloads1deda812866e…Get
  • 7.4.4+fabric8 Apr 20251.21.40.4 MB3.4k downloads9317cc8384f6…Get
  • 7.4.3+neoforge6 Apr 20251.21.40.4 MB118 downloads02cc81a0dd89…Get
  • 7.4.3+fabric6 Apr 20251.21.40.4 MB156 downloads3b589c2a135b…Get
  • 5.4.3+neoforge18 Sept 20241.21, 1.21.10.4 MB30.2k downloadsf42d190cfc58…Get
  • 5.4.3+fabric18 Sept 20241.21, 1.21.10.4 MB12.7k downloads590efb1fc1bd…Get
  • 5.4.2+neoforge16 Sept 20241.21, 1.21.10.4 MB188 downloads479ba173e7e8…Get
  • 5.4.2+fabric16 Sept 20241.21, 1.21.10.4 MB218 downloadse4cd0a172e7c…Get
  • 4.4.2+forge19 Aug 20241.20.10.4 MB381.9k downloadsedb20a8f7d27…Get
  • 4.4.2+fabric19 Aug 20241.20.10.5 MB111.7k downloadsf7e69c9cc98a…Get
  • 4.4.1+forge4 Feb 20241.20.10.5 MB158.7k downloadsdbe22ce27eac…Get
  • 4.4.1+fabric4 Feb 20241.20.10.5 MB39.2k downloads66130f8f171d…Get
  • 4.4.0+forge4 Sept 20231.20.10.5 MB5.3k downloads5be07b581156…Get
  • 4.4.0+fabric4 Sept 20231.20.10.5 MB7.7k downloads7dbf454bcd7f…Get
  • 4.3.3+forge31 Aug 20231.19.30.5 MB239 downloadsa6c6e81591a5…Get
  • 4.3.3+fabric31 Aug 20231.19.30.5 MB276 downloads9be4af391689…Get
  • 4.3.1+forge25 Dec 20221.19.30.5 MB274 downloads2f8ec5d0ad98…Get
  • 4.3.1+fabric25 Dec 20221.19.30.5 MB612 downloadse61c33af98a0…Get
  • 3.3.1+forge18 Dec 20221.19.20.5 MB434.1k downloadsdbef7728827f…Get
  • 3.3.1+fabric18 Dec 20221.19.20.5 MB18.6k downloads1b9c63dd3bb9…Get
  • 3.3.0+forge7 Nov 20221.19.20.5 MB369 downloadsafe051057539…Get
  • 3.3.0+fabric7 Nov 20221.19.20.5 MB546 downloads0a2b823eb728…Get
  • 2.2.3-forge18 Jun 20221.18.29.1 MB22.2k downloads31eb3edfd1bf…Get

Frequently asked

Does Observable work on Minecraft 1.21.4?

Yes. 1.21.4 is the newest Minecraft version Observable 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 Observable support?

Everything the author has declared, from 1.16.5 up to 1.21.4. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Observable 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 Observable support?

Fabric, NeoForge, Quilt, Forge. 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 Observable?

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 Observable under?

MPL-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 Observable?

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 Observable 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.

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.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.

Last checked 2 mo 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? .