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mod

FlashFreezeMinecraft mod for 1.21.5

Preserve unknown blocks, entities and items

client and servernewest supported 1.21.5Utility
Latest version
0.3.4+1.20.1
Minecraft
1.16.5 to 1.21.5
Java
Java 21+
Loaders
NeoForge, Forge, Fabric
Licence
LGPL-3.0-only
Downloads
13.9k
Updated
14 mo ago
Available on
Modrinth
Space NodePartner

Host FlashFreeze servers

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

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

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.5NeoForge, Forge, Fabric21+declared25 Mar 2025
1.21.1Fabric, NeoForge, Forge21+declared8 Aug 2024
1.21Forge, NeoForge, Fabric21+declared13 Jun 2024
1.20.1Fabric, Forge, NeoForge17+declared12 Jun 2023
1.19Fabric, NeoForge, Forge17+declared7 Jun 2022
1.17.1Fabric, NeoForge, Forge16+declared6 Jul 2021
1.17NeoForge, Forge, Fabric16+declared8 Jun 2021
1.16.5Fabric, Forge, NeoForge8+declared14 Jan 2021

Download

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

0.3.4+1.20.1beta30 May 2025

flashfreeze-0.3.4+1.20.1.jar · 0.7 MB · for 1.20.1

Download latest
e4aac942cc12…
Older versions17
  • 0.4.1+1.21.5-neoforge27 May 20251.21.50.1 MB73 downloads0490c02f933a…Get
  • 0.4.1+1.21.5-fabric27 May 20251.21.50.1 MB101 downloadsc3b4d159c70e…Get
  • 0.4.1+1.21.1-neoforge24 Apr 20251.21.10.1 MB10.2k downloads77fc2477491a…Get
  • 0.4.1+1.21.1-fabric24 Apr 20251.21, 1.21.10.1 MB550 downloadsad819cc08f1a…Get
  • 0.4.0+1.21.128 Feb 20251.21.10.1 MB107 downloads653f475f0cee…Get
  • 0.3.3+1.20.11 Jun 20241.20.10.7 MB259 downloadsf2aadd156f38…Get
  • 0.3.2+1.198 Aug 20221.190.5 MB223 downloads9f6edf3ebc4d…Get
  • 0.3.1+1.196 Aug 20221.190.5 MB130 downloads43425c5e3ade…Get
  • 0.3.0+1.195 Aug 20221.190.5 MB145 downloads278cc0f806a8…Get
  • 0.2.1+1.17-forge27 Oct 20211.17.1177 downloads
  • 0.2.1+1.17-fabric27 Oct 20211.17, 1.17.1188 downloads
  • 0.2.1+1.16.5-forge27 Oct 20211.16.5189 downloads
  • 0.2.1+1.16.5-fabric27 Oct 20211.16.5177 downloads
  • 0.2.0+1.1710 Aug 20211.17, 1.17.1202 downloads
  • 0.2.0+1.16.5-fabric10 Aug 20211.16.5178 downloads
  • 0.2.0+1.16.5-forge10 Aug 20211.16.5195 downloads
  • 0.1.012 Jul 20211.17256 downloads

Frequently asked

Does FlashFreeze work on Minecraft 1.21.5?

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

Everything the author has declared, from 1.16.5 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 FlashFreeze 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 loader does FlashFreeze need?

NeoForge, Forge, 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 FlashFreeze?

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 FlashFreeze 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 FlashFreeze?

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 FlashFreeze 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.

Entity CullingUsing async path-tracing to hide Block-/Entities that are not visibleFerriteCoreMemory usage optimizationsImmediatelyFastSpeed up immediate mode rendering in MinecraftYetAnotherConfigLib (YACL)A builder-based configuration library for Minecraft!Xaero's MinimapDisplays a map of the nearby world terrain, players, mobs, entities in the corner of your screen. Lets you create waypoints which help you find the locations you've marked.[ETF] Entity Texture FeaturesEmissive, Random & Custom texture support for entities in resourcepacks just like Optifine but for Fabric

Last checked 9 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? .