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UnlerpMinecraft mod for 1.21.5

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

client onlynewest supported release 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
13 mo ago
Available on
Modrinth

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.

For Minecraft 1.21.5

Choose the loader you use before downloading.

  • Fabric

    2.0.0 · 1 May 2025 · unlerp-2.0.0-1.21+.jar

    Get Fabric

Most recently published release

3.0release15 Sept 2025

unlerp-fp.jar · 0.1 MB · for 1.19.4 · Fabric

Download this release
09ce73b17f65…
Older versions2
  • 2.0.01 May 20251.21.5, 1.21.4, 1.21.3, 1.21.2, 1.21.1 +1 more0.1 MB226 downloadsb20a0eafda36…Get
  • 1.0.03 Sept 20241.21.1, 1.21, 1.20.6, 1.20.5, 1.20.4 +83 more0.1 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 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 Unlerp 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 Unlerp?

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 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?

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.

Armor HiderHide or adjust the transparency of armor, glint, and offhand items - with full multiplayer sync. No dependencies required.Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftArchitectury 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.AttributeFixRemoves arbitrary limits on Minecraft's attribute system.

Details from Modrinth, where the author last updated it on 15 Sept 2025. We do not host files or republish descriptions. Available download links point to the author’s own release.

Not indexed yet. Score 51 against a threshold of 55. The page still exists and is still linked; it simply carries noindex until we hold more.

Is this information wrong or missing something? .