Why does my zombie's left arm look like its right arm?
Zombies and husks use Minecraft's older body model, which only has a picture for the right arm and leg — the game mirrors them for the left. Drowned have both, so they keep your left side exactly.
Do baby zombies change too?
Yes. Since Java 26.1 (and on Bedrock) baby zombies have their own little model and texture, so the pack makes a mini version of your skin for them. In older versions babies wear the grown-up picture, so they change with it.
Will other players see it?
Only players who have the pack turned on. Send it to your friends — then everyone on the server sees the same zombies.
Does it change zombie villagers?
No. Zombie villagers are built like villagers, not like players, so a skin doesn't fit them — they stay as they are.
Is my skin uploaded anywhere?
No. The pack is made in your browser. Only a username lookup asks a server which skin that account wears.