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OptiscaleMinecraft mod for 1.21.1

Fine-tune your GUI scale in both vanilla and optifine

client onlynewest supported 1.21.1Utility
Latest version
1.21.1-1.02
Minecraft
1.18.1 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge
Licence
LicenseRef-All-Rights-Reserved
Downloads
3.7k
Updated
3 mo ago
Available on
Modrinth

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.20.4NeoForge, Forge17+declared7 Dec 2023
1.20.3Forge, NeoForge17+declared4 Dec 2023
1.20.2NeoForge, Forge17+declared20 Sept 2023
1.20.1Forge, NeoForge17+declared12 Jun 2023
1.19.4NeoForge, Forge17+declared14 Mar 2023
1.19.3Forge, NeoForge17+declared7 Dec 2022
1.19.2NeoForge, Forge17+declared5 Aug 2022
1.18.2NeoForge, Forge17+declared28 Feb 2022
1.18.1NeoForge, Forge17+declared10 Dec 2021

Download

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

1.21.1-1.02release27 Jun 2026

optiscale-1.21.1-1.02.jar · 42 KB · for 1.21.1

Download latest
2a608f49d53c…
Older versions12
  • 1.20.1-1.043 Feb 20251.20.149 KB1.2k downloads9d879d7752e6…Get
  • 1.20.1-1.033 Feb 20251.20.149 KB56 downloads162d25fecaf5…Get
  • 1.0218 Mar 20241.20.446 KB227 downloads40d88c6cd33a…Get
  • 1.20.4-1.0218 Mar 20241.20.446 KB242 downloads1dbbb9c29536…Get
  • 1.20.1-1.0218 Mar 20241.20.146 KB609 downloadsc96eb260b430…Get
  • 1.20.4-1.0116 Mar 20241.20.446 KB72 downloads67f8d8857bde…Get
  • 1.20.1-1.0116 Mar 20241.20.146 KB101 downloads965f2bbb9b57…Get
  • 1.18.1-1.013 Mar 20241.18.2, 1.18.146 KB217 downloads7f8998557d9c…Get
  • 1.19.2-1.013 Mar 20241.19.4, 1.19.3, 1.19.246 KB294 downloads2a688d59f4fe…Get
  • 1.20.1-1.013 Mar 20241.20.4, 1.20.3, 1.20.2, 1.20.146 KB132 downloadseb191b103956…Get
  • 1.20.2-1.013 Mar 20241.20.4, 1.20.3, 1.20.246 KB79 downloads04bddf72b4a4…Get
  • 1.20.4-1.013 Mar 20241.20.446 KB94 downloadsad7e667ae7a4…Get

Frequently asked

Does Optiscale work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Optiscale 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 Optiscale support?

Everything the author has declared, from 1.18.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Optiscale 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 Optiscale support?

NeoForge, 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 Optiscale?

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 Optiscale under?

LicenseRef-All-Rights-Reserved, 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 Optiscale?

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 Optiscale 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.

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Details from Modrinth, where the author last updated it on 27 Jun 2026. 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? .