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Minecraft Mod Compatibility & Performance Checker

Check Forge, NeoForge, Fabric, or Quilt mod lists for loader conflicts, missing dependencies, RAM pressure, FPS impact, and server TPS risk.

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Version & Loader

Mod List

Paste one mod per line, comma-separated names, or jar filenames. Unknown mods are kept in the report.

Performance Inputs

Graphics Load

Preview

Selected known mods

plus pasted unknown or jar-name entries.

Static compatibility model

This checker flags known conflicts and common risks. Always verify unknown mods on the author's project page.

Quick Load:

Checking mod compatibility...

Paste a mod list or select known mods, then click Check Compatibility to find conflicts, dependencies, RAM needs, and performance risk.

How the Minecraft mod compatibility checker works

This checker compares your mod list against a static compatibility dataset, then layers in loader, Minecraft version, Java version, environment, RAM, shader, resource pack, and server player-count assumptions. It is built for fast planning before you launch a pack, not as a replacement for reading every mod page.

Why loader compatibility matters

Forge, NeoForge, Fabric, and Quilt are separate loader ecosystems. A Fabric-only renderer such as Sodium will not work on a Forge server, while Forge-family mods such as Mekanism usually need Forge or NeoForge. Loader mismatches are treated as critical because they commonly prevent launch.

Dependencies and common conflicts

Many Minecraft mods need libraries such as Fabric API, Architectury API, Patchouli, Balm, Flywheel, or TerraBlender. Shader and optimization stacks also conflict often: Sodium pairs with Iris on Fabric, while Embeddium pairs with Oculus on Forge or NeoForge.

Performance estimates

The RAM and FPS estimate combines base Minecraft memory, matched mod overhead, shaders, resource packs, and multiplayer scaling. Optimization mods can reduce memory or FPS cost, while world generation, tech, map, and shader mods increase pressure.

Official modding links

Use Minecraft.net, Minecraft Forge, Fabric, Quilt, Modrinth, CurseForge, and Adoptium Java builds to verify current loader and Java requirements.

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FAQ

Can this check every Minecraft mod?

No. It checks known high-volume mods and common conflict patterns. Unknown mods are listed separately so you can verify them manually.

Does a high score guarantee the pack will launch?

No. A high score means no obvious static blockers were found. Always test in a fresh world before loading an important save.

Why are client-only mods flagged on servers?

Client-only mods often reference rendering classes that do not exist on dedicated servers. Those entries should usually be removed from the server mods folder.