You cannot spawn Herobrine in vanilla Minecraft because he does not exist in the game
Install a Herobrine mod or add-on if you want a Herobrine-like entity
Follow the mod’s installation instructions exactly
Use the mod’s required item, command, or ritual if it provides one
In Java Edition, enable cheats if the mod or command requires them
In Bedrock Edition, use the add-on’s spawning method if available
If you want a fake Herobrine effect, use commands, skins, or custom maps
Avoid downloading files from untrusted sources