FailSafeBlocks
Fix your broken worlds! This mod replaces missing blocks with colorful placeholders instead of crashing.
What it does
- Catches missing blocks when loading chunks and replaces them with colored placeholders
- Uses 128 different colored placeholder blocks to help identify different missing blocks
- Maps the same missing block ID to the same placeholder consistently
- Works with any modded world - great for when you've uninstalled mods
How to use
- Install the mod
- Load your world that has missing blocks
- The mod will automatically replace missing blocks with placeholders
- You can mine and replace the placeholders like normal blocks
feel free to use on modpacks
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as failsafeblocks-1.0-SNAPSHOT.jar — drop this file into the mods folder
- Download size: 236 KB
- Download link checked 31 Aug 2026 — working
These come from our own check of the pack file, not from the source page.