ModsFinder

ModsChecker

by stressed_out

ModsChecker compares the current mod list with the one a singleplayer world last loaded, so a changed setup is caught before the world opens.

FabricClient-side onlyMIT License1.20 – 1.20.1

What it does

Before a singleplayer world loads, ModsChecker compares the mods now installed with the environment the world was last loaded under. It reports mods that were added, removed or updated, which helps when a changed mod list might damage a save. After a successful load, the current mod list is copied and kept for later comparisons.

The mod is a client-only utility, so only the player's game needs it and a server or multiplayer session runs without it. It requires Fabric API and works with Fabric for Minecraft 1.20.1. Builds exist for 1.20 and 1.20.1, and the Fabric file 1.0 for 1.20.1 was published on 2025-06-28 under the MIT License. The code is not open source.

Key features

  1. Mod list comparison

    Current mods are checked against the list stored from the last successful load of a singleplayer world.

  2. Change report

    Mods that were added, removed or updated since that load are listed before the world is opened.

  3. Saved mod list

    After a successful load, the current mod list is copied so future comparisons have a reference point.

  4. Safer world data

    The mod leaves world data alone, which reduces the chance of a crash that corrupts a save.

Compatibility

Latest build for each game version and loader.

1.20.11.0
1.201.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Use cases

Updating a modpack

Players who change mods in an existing pack can see which changes touch a world before loading it.

Recovering from a crash

After a crash caused by a mod change, the list of differences points to the mod that was added, removed or updated.

Who it’s for: Singleplayer players on Fabric who change their mod list often and want to know what changed before a world opens.

Questions

Does ModsChecker require Fabric API?

Yes. Fabric API is a required dependency and must be installed next to ModsChecker on Fabric for 1.20.1.

Does the server need ModsChecker?

No. Only the player's game needs it, and servers run without it.

Which game versions does ModsChecker support?

The mod is published for 1.20 and 1.20.1, with the Fabric file 1.0 targeting 1.20.1.

In the catalog

ModsChecker is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 34,764 mods support Minecraft 1.20.1.

Management mods8,016Fabric modsMods for 1.20.134,764

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What the author says

ModsChecker is a utility mod that detects changes in your mod list before loading a singleplayer world. It compares the current mod environment to the one when the world was last loaded, including added, removed, and updated mods. If any differences are found, the world loading process is paused, and a detailed list…
stressed_out, on the Modrinth page

Official listing

Owner
stressed_out
Published
2025-06-28
Updated on Modrinth
2025-06-28
Facts verified
2026-10-15

Tags

ManagementUtilityOptimization
Open on ModrinthCompare