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Crash & Log Error Analyzer

Paste a latest.log or a crash report and get the actual root-cause line, in plain English, with the fix. Works for Paper, Spigot, Vanilla and Bukkit server logs as well as modded Forge and Fabric crash reports.

Input

Paste your log or crash report

The whole file is fine — the analyzer finds the part that matters. Server logs live in logs/latest.log, crash reports in crash-reports/.

Nothing leaves your browser. Pattern-matching runs locally in this page. The log is never uploaded, never sent to Wespner and never stored — closing the tab is all the cleanup there is. Files you pick are read by the browser's own file reader, not transferred anywhere.

Paste here, or drop a file onto this box.

Ctrl + Enter also runs the analysis.

More samples

No log analyzed yet. Paste one above, or load a sample to see what the output looks like.

How to read this

A crash report names the messenger, not the culprit

The top of a Java stack trace is where the error surfaced, usually deep inside Minecraft itself. The useful part is normally the last "Caused by:" line, or the first mod or plugin package name in the trace. That is the line this tool puts in front of you — everything above it is the server describing how it fell over, not why.

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