Question 1

What is OpenLauncher?

Accepted Answer

OpenLauncher is a fast, modern, and open-source Minecraft launcher built with React and Electron for Windows, macOS, and Linux. It includes built-in mod management via Modrinth, support for all major mod loaders, and automatic JVM performance tuning.

Question 2

Is OpenLauncher completely free and open source?

Accepted Answer

Yes, OpenLauncher is 100% free and open source licensed under GPL-2.0. The full source code is publicly accessible on GitHub.

Question 3

Which Minecraft mod loaders does OpenLauncher support?

Accepted Answer

OpenLauncher supports Vanilla, Fabric, Forge, NeoForge, and Quilt, including snapshot releases and custom Java version management.

Question 4

How does OpenLauncher optimize Minecraft performance?

Accepted Answer

OpenLauncher automatically applies optimal dynamic JVM garbage collection flags (such as Generational ZGC for Java 21+ and optimized Aikar's G1GC for Java 8-17) and allows granular per-profile RAM allocation.

Question 5

Does OpenLauncher support Microsoft and Offline accounts?

Accepted Answer

Yes, OpenLauncher provides secure OAuth authentication for official Microsoft accounts with Minecraft licenses as well as local offline profiles.