SJMCL

Windows · Mac · Linux

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Freedom report

Two barsScore 6.8

Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

SJMCL is ranked #36 of 74 in Minecraft launchers on Freedom251. It runs on Linux, macOS, Windows.

Compared on Minecraft launchers

Free plan: Yes
Separate instances: Yes
Modpack import: both
Mod loader support: multiple
Java runtime management: Yes
Automatic updates: Yes

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The record

Product: SJMC Launcher is an open-source, cross-platform Minecraft launcher built with the Tauri framework.
Instance management: It manages multiple game directories and instances, including saves, mods, resource packs, shaders, screenshots, and settings.
Downloads: It supports downloading game clients, mod loaders, game resources, and modpacks from sources including CurseForge and Modrinth.
Accounts: It supports Microsoft sign-in and third-party authentication servers, and is compatible with the Yggdrasil Connect OAuth login flow proposal.
External integrations: Deep links and an MCP service let it work with external webpages, programs, and agent services.
Extensions: The launcher supports developing extensions, though the documentation marks this feature as coming soon.
Operating systems: The maker lists compatibility with Windows 10/11, macOS, and Linux.
Download formats: Downloads include Windows x86, x64, and ARM64 installers and portable versions; macOS Apple Silicon and Intel DMG and App Bundle files; and Linux DEB, RPM, and portable versions.
Feature availability: The maker says some features may be limited by region, operating platform, or distribution type.
Project: The project was initiated by members of the Shanghai Jiao Tong University Minecraft Society and is developed and maintained with open-source community contributors.
Support: The homepage links to a user QQ group.
Product status: The maker says the software is not an official Minecraft product and is not approved by or affiliated with Mojang or Microsoft.
Instances: It manages multiple game directories and instances, including saves, mods, resource packs, shader packs, screenshots, and settings.
Automation: Its MCP service lets external Agent applications automate the launcher while it is running.

Where it ranks on Freedom251

Best Minecraft Launchers in 2026#36 of 74

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Sources

mc.sjtu.cn/sjmcl/docs/· checked 11 Oct 2026
mc.sjtu.cn/sjmcl/· checked 11 Oct 2026
mc.sjtu.cn/sjmcl/downloads/· checked 11 Oct 2026
mc.sjtu.cn/sjmcl/docs/intelligence/launcher-mcp.ht· checked 11 Oct 2026
mc.sjtu.cn/sjmcl/docs/tos.html· checked 11 Oct 2026