Side by side

Fjord Launcher vs OpenJar Launcher

Both stand on minecraft launchers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Fjord Launcher

Free plan LinuxMacWindows

Choose Fjord Launcher if you want a free Minecraft launcher with separate instances, modpack tools and support for alternative authentication servers. Look elsewhere if you need to add an offline or authlib-injector account without first adding a Microsoft account.

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OpenJar Launcher

Free plan LinuxMacWindows

OpenJar brings instance, pack, update, and troubleshooting tools together, while keeping data local by default. Note the limited Friend Link scope and the license restriction on commercial use.

Visit OpenJar Launcher

The facts

	Fjord Launcher	OpenJar Launcher
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Linux, Mac, Windows	Linux, Mac, Windows
Lowest paid plan	Free or on request	Free or on request
Plans published	1	1
Maker	Not published	Not published
Website	github.com	github.com
On minecraft launchers	#16 of 76	#12 of 76

Fjord Launcher: what it does well

Supports separate instances and multiple mod loaders.
Imports modpacks from both listed sources.
Includes Java runtime management and a modpack catalog.
Supports automatic updates.
Offers Windows, macOS and Linux builds.

What to know first

A Microsoft account must be added before an offline or authlib-injector account.
No paid plans are stated.

OpenJar Launcher: what it does well

Separate on-disk folders for each instance.
Integrates with Modrinth, CurseForge, and GitHub.
Imports modpacks and Vanilla or Prism instances.
Rollback snapshots are available before Update All.
Refresh tokens use OS secure storage in production builds.

What to know first

Friend Link lacks hosted relay and world-save replication in v1.
Commercial use requires written permission.
macOS receives the most manual testing.

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