MC Toolkit / Servers / Server Diagnostics
Minecraft Server Diagnostics
Find out why Minecraft crashed instead of reading Exit Code 1, and check whether a Java server is up. The log is read in your browser and never uploaded.
Drop latest.log or a crash report here
Forge, NeoForge, Fabric and Quilt — read in this tab, never uploaded.
Nothing is uploaded. Before anything is shown, home directories, IP addresses, account UUIDs and token-shaped fields are masked — but read it before you paste it anywhere public, because a mod can print anything in a format no filter knows.
This is the one page on this site that asks a third party for something: the status query goes to a public Minecraft status API, so the address you type leaves your browser. Check servers you run or intend to join — not address ranges.
Latest guides
Browse all guides →How to fix “Multiplayer is disabled” in Minecraft Java Edition
The greyed-out Multiplayer button has four possible messages in the 26.3 code, and only one is a setting you can change. What each means, and the fix.
Exit code is not a crash reason, it is a shrug
The number tells you nothing. The line above it tells you everything, and it is already sitting in your logs folder.