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UnlerpMinecraft mod for 1.21.5

Make your game run """Smoother""" by changing the game's interpolation!

client onlynewest supported 1.21.5Game MechanicsCursed
Latest version
3.0
Minecraft
1.0 to 1.21.5
Java
Java 21+
Loader
Fabric
Licence
LGPL-3.0-only
Downloads
2.2k
Updated
11 mo ago
Available on
Modrinth
Space NodePartner

Host Unlerp servers

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

  • 1.21.5
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.5Fabric21+declared25 Mar 2025
1.21.4Fabric21+declared3 Dec 2024
1.21.3Fabric21+declared23 Oct 2024
1.21.2Fabric21+declared22 Oct 2024
1.21.1Fabric21+declared8 Aug 2024
1.21Fabric21+declared13 Jun 2024
1.20.6Fabric21+declared29 Apr 2024
1.20.5Fabric21+declared23 Apr 2024
1.20.4Fabric17+declared7 Dec 2023
1.20.3Fabric17+declared4 Dec 2023
1.20.2Fabric17+declared20 Sept 2023
1.20.1Fabric17+declared12 Jun 2023
1.20Fabric17+declared2 Jun 2023
1.19.4Fabric17+declared14 Mar 2023
1.19.3Fabric17+declared7 Dec 2022
1.19.2Fabric17+declared5 Aug 2022
1.19.1Fabric17+declared27 Jul 2022
1.19Fabric17+declared7 Jun 2022
1.18.2Fabric17+declared28 Feb 2022
1.18.1Fabric17+declared10 Dec 2021
1.18Fabric17+declared30 Nov 2021
1.17.1Fabric16+declared6 Jul 2021
1.17Fabric16+declared8 Jun 2021
1.16.5Fabric8+declared14 Jan 2021
1.16.4Fabric8+declared29 Oct 2020
1.16.3Fabric8+declared10 Sept 2020
1.16.2Fabric8+declared11 Aug 2020
1.16.1Fabric8+declared24 Jun 2020
1.16Fabric8+declared23 Jun 2020
1.15.2Fabric8+declared17 Jan 2020
1.15.1Fabric8+declared16 Dec 2019
1.15Fabric8+declared9 Dec 2019
1.14.4Fabric8+declared19 Jul 2019
1.14.3Fabric8+declared24 Jun 2019
1.14.2Fabric8+declared27 May 2019
1.14.1Fabric8+declared13 May 2019
1.14Fabric8+declared23 Apr 2019
1.13.2Fabric8+declared22 Oct 2018
1.13.1Fabric8+declared22 Aug 2018
1.13Fabric8+declared18 Jul 2018

52 older versions not shown.

Download

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

3.0release15 Sept 2025

unlerp-fp.jar · 0.1 MB · for 1.19.4

Download latest
09ce73b17f65…
Older versions2
  • 2.0.01 May 20251.21, 1.21.1, 1.21.2, 1.21.3, 1.21.40.1 MB226 downloadsb20a0eafda36…Get
  • 1.0.03 Sept 20241.0, 1.1, 1.2.1, 1.2.2, 1.2.30.1 MB1.0k downloadsaef777092f7c…Get

Frequently asked

Does Unlerp work on Minecraft 1.21.5?

Yes. 1.21.5 is the newest Minecraft version Unlerp 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 Unlerp support?

Everything the author has declared, from 1.0 up to 1.21.5. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Unlerp on the client or the server?

The client only. There is nothing to install on the server, so it works on any server you can already join.

Which loader does Unlerp need?

Fabric. 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 Unlerp?

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 Unlerp under?

LGPL-3.0-only, 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 Unlerp?

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 Unlerp 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.

ImmediatelyFastSpeed up immediate mode rendering in MinecraftYetAnotherConfigLib (YACL)A builder-based configuration library for Minecraft![ETF] Entity Texture FeaturesEmissive, Random & Custom texture support for entities in resourcepacks just like Optifine but for FabricArchitectury APIAn intermediary api aimed to ease developing multiplatform mods.[EMF] Entity Model FeaturesEMF is an, OptiFine format, Custom Entity Model replacement mod available for Fabric and Forge.AppleSkinFood/hunger-related HUD improvements

Last checked 6 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? .