Prism Launcher: what it is and how to set it up

Prism Launcher is a Minecraft launcher for people who play more than one setup. Each setup lives in its own instance, with its own Minecraft version, mod loader, mods and settings, so a 1.20.1 Forge pack and a vanilla world never touch each other. The project calls itself “an open-source Minecraft launcher with the ability to manage multiple instances, accounts and mods”.

It is free, it runs on Windows, macOS and Linux, and it downloads mods and modpacks from Modrinth and CurseForge without a browser. The current release is 11.1.1, a security hotfix from late September 2026.

We did not install Prism for this page. Everything below comes from the Prism website, its wiki and its GitHub repository, checked on October 16, 2026.

Where Prism comes from

Prism is the third launcher in one family tree. The README says plainly: “This is a fork of the MultiMC Launcher and is not endorsed by it.” Prism’s FAQ fills in the middle step. PolyMC split from MultiMC in late 2021, mostly over how third-party packages could be built and shared. In October 2022 the Prism team forked PolyMC in turn, after what the FAQ calls a hostile takeover of that project by one person. The FAQ now advises PolyMC users to move to Prism.

If you still use MultiMC, the move is a copy and paste. Prism’s wiki has you open MultiMC’s instance folder, copy the instances you want, and paste them into Prism’s Instances folder. Copy MultiMC’s icons folder too if you want to keep your pack icons.

What it does

Instances

An instance is one self-contained copy of Minecraft. The website describes it as running “several Minecraft setups, each with its own settings, mods, and configuration.” You can keep a modded survival world, a modpack and a snapshot side by side, and an update to one does not break the others.

Mods and modpacks

Prism talks to Modrinth and CurseForge directly. Inside an instance you search either site, tick the mods you want and press OK. The wiki notes that many mods are on both sites, that Modrinth focuses on free and open-source mods, and that some older mods are only on CurseForge.

For whole modpacks, the Add Instance window has a sidebar of sources: ATLauncher, CurseForge, FTB Legacy, FTB App Import, Modrinth and Technic. The Import option takes a pack you downloaded yourself, as a .zip or .mrpack file.

Java

Different Minecraft versions need different Java versions, and getting this wrong is a classic reason a pack will not start. From Prism 9.0, two settings handle it for you: “Autodetect Java version” and “Auto-download Mojang Java”. The wiki warns that the downloader is not in every package. On Linux, only the official Flatpak and AppImage usually include it. Its table pairs Java 8 with versions before 1.17, Java 17 with 1.17 to 1.20.4, and Java 21 with 1.20.5 and newer.

How to install Prism Launcher

The download page lists several options for each system. On Windows you get an installer or a portable zip, for x86-64 and ARM64, plus package manager commands:

• WinGet: winget install --exact PrismLauncher.PrismLauncher
• Scoop: add the games bucket, then install prismlauncher
• Chocolatey: choco install prismlauncher

The installer is the MSVC build. The MinGW builds need 64-bit Windows 10 or 11 and no Visual C++ Redistributable, but the download page says they are less tested. macOS and Linux have their own pages on the same site, and Linux users also get a Flatpak.

How to set up your first instance

1. Open Prism and add your Microsoft account.
2. Click Add Instance in the top bar, or right-click an empty part of the window and choose Create instance.
3. Pick a Minecraft version. To install a modpack instead, choose a platform in the left sidebar and pick the pack there.
4. Right-click the new instance, choose Edit, and open the Version tab to add a mod loader.
5. Open the Mods tab, click Download Mods, choose Modrinth or CurseForge, and select the mods you want.
6. Press OK to download them, then launch the instance.

Which loader? The wiki’s advice is Forge for Minecraft 1.20.1 and older and NeoForge for newer versions. Fabric covers 1.14 and later, and most Fabric mods also need Fabric API. For Quilt, the wiki sends you to Quilt’s own guide. Our Minecraft Forge guide explains the Forge and NeoForge split, and the JEI review walks through a real mod install in Prism step by step.

The 11.1.1 security fix

Prism 11.1.1 is a hotfix for a vulnerability that appeared in 11.1.0. The release notes list one change: it blocks path traversal in CurseForge modpack overrides. Path traversal means a crafted file path can reach outside the folder it should stay in. The team said more details would follow. If you are on 11.1.0, update.

Alternatives

MultiMC is still around, and its instances move to Prism with the copy and paste above. The CurseForge and Modrinth sites also offer their own apps. Prism’s case is that it reads both sites, plus FTB, ATLauncher and Technic packs, in one launcher that is not tied to any of them.

Verdict

4.5 out of 5

Prism is the launcher we point readers to for modded Minecraft: separate instances, both big mod sites built in, and free on every desktop system. Half a star stays off for thin docs in places and the 11.1.0 security slip.

Facts checked against the official pages on October 16, 2026

Sources

• Prism Launcher website and Windows downloads
• PrismLauncher/PrismLauncher on GitHub and the 11.1.1 release notes
• Prism Launcher wiki: FAQ
• Prism Launcher wiki: Creating an instance and Downloading mods
• Prism Launcher wiki: Downloading modpacks
• Prism Launcher wiki: Installing Java and Migrating from MultiMC