Guides

Find the UUID of a Java Edition account from its username, tell the dashed and undashed forms apart, and get the offline-mode UUID a server uses when online mode is off.

Why a Java Edition name change keeps a player’s UUID, what servers, whitelists and plugins see afterwards, and when a rename does cause lost data.

Download any Java Edition player’s current skin as the original PNG, check whether it uses slim or classic arms, and upload it to your own account.

Preview a skin file in 3D to catch the wrong arm model, missing outer layers and transparency problems before the skin goes on your account.

Check a Java or Bedrock server’s status from its address, read what the result means, and work out why a running server can still look offline.

Turn on the whitelist for a Java Edition server, add players with commands or a whitelist.json file, and avoid the online-mode and operator surprises.

Edit a vanilla Java Edition server.properties file safely: which settings to change first, how values are written, and where PvP and other old settings went.

Write a two-line server list message with colours and formatting, put it in server.properties with the right escapes, and know when you need a plugin instead.

How gradient text is built from one colour per character, which format works in vanilla commands, plugins and MiniMessage, and why it doesn’t work in server.properties.

Convert Overworld and Nether coordinates with the 1:8 rule, handle negative numbers correctly, and place portals so they link where you expect.

What a chunk is, how block coordinates map to chunk and region coordinates (including negatives), and why chunk borders matter for farms and loading.

Turn an item count into stacks, shulker boxes and chests, with worked examples for items that stack to 64, 16 or not at all.