Environment detection
Extracts Minecraft, Java and loader versions so you can spot a wrong runtime or file family before changing the pack.
Private. Fast. No upload.
Turn a Minecraft
crash log into a fix.
Drop in latest.log or a crash report. MC Mods finds missing dependencies, wrong Java versions, Mixin failures, duplicate mods and loader conflicts directly in your browser.
- ✓ Forge
- ✓ Fabric
- ✓ NeoForge
- ✓ Quilt
12:08:41 Mod resolution encountered
an incompatible mod set
12:08:41 Mod 'Example' requires
fabric-api, which is missing!
LIKELY CAUSEMissing dependency
97%Install Fabric API for your Minecraft version.
01CRASH ANALYZER
Paste the evidence.
Find the first real failure.
No loader selection needed. MC-MODS detects Fabric, Forge, NeoForge or Quilt automatically. The log stays on this device, and personal values are redacted from quoted evidence.
Auto-detect loader · Maximum 8 MB
02WHAT IT CHECKSA useful diagnosis,
A useful diagnosis,
not another error dump.
Failure-pattern matching
Prioritizes the first actionable dependency, Mixin, class-loading, memory, graphics or mod-file failure.
Evidence with confidence
Quotes the lines behind each finding and labels uncertain results instead of presenting a guess as fact.
Safe next steps
Suggests a controlled troubleshooting order so you do not update everything at once or risk an important world.
01
Crash basics
↗02How to Fix Minecraft Exit Code 1 with Mods
Find the real cause behind Minecraft Exit Code 1, locate the correct log, and fix loader, Java, dependency, and mod conflicts safely.
Dependency errors
↗03Missing Mod Dependencies: Find and Fix Them
Understand missing dependency errors in Fabric, Forge and NeoForge and install the correct library without creating new conflicts.
Mixin failures
↗04Minecraft “Mixin Apply Failed” Error Explained
Trace Mixin failures to the responsible mod and distinguish a version mismatch from a real mod conflict.
Java runtime
↗05Choose the Right Java Version for Modded Minecraft
Diagnose UnsupportedClassVersionError and configure the correct Java runtime for a modded Minecraft instance.
Loader compatibility
↗Forge vs Fabric vs NeoForge: Avoid Wrong-Loader Mods
Learn why mod-loader files are not interchangeable and identify a Forge, Fabric, NeoForge, or Quilt mismatch.
04READING MODDED MINECRAFT LOGS
Why the first exception matters more than the last line
A modded Minecraft crash often creates a cascade. One dependency fails to load, another mod cannot find the class it expected, the loader stops initialization, and the launcher finally reports Exit Code 1. The last line describes where the process ended; it may not describe where the problem began.
Start with the earliest specific failure. Loader messages containing requires, missing, incompatible, Caused by, or Mixin apply failed usually carry more diagnostic value than a generic shutdown message. MC Mods groups these patterns, preserves short evidence lines, and orders critical findings before secondary warnings.
Change one variable at a time
When a report names one incompatible mod, update or remove that file in a copied instance and launch again. Replacing the loader, Java, every library and half the mods simultaneously may make the game start, but it does not reveal the actual conflict and can introduce a different one.
Always back up an established world before changing content mods. A diagnostic test should happen in a duplicated instance or a fresh world whenever removing a mod could affect saved blocks, items, entities or dimensions.
05QUESTIONS
Before you analyze
Does MC Mods upload my crash report?+
No. The first version analyzes text locally in your browser. Your log is not sent to MC Mods, stored in a database, or used to train a model.
What should I upload?+
Start with latest.log from the affected instance. If a crash report was created, you can analyze that too. A launcher screenshot or Exit Code 1 alone rarely contains the cause.
Which mod loaders are supported?+
The analyzer recognizes common errors from Fabric, Forge, NeoForge and Quilt. Results improve when the log includes the loader header and the original exception.
Can an analyzer identify every crash?+
No automated tool can prove every mod conflict from one log. MC Mods shows confidence levels, quotes the supporting evidence, and avoids claiming certainty when the report is incomplete.