Open the world in Minecraft
Type `/seed` in chat
Press Enter
Read the seed shown in chat
If cheats are disabled, enable cheats or use operator permissions
In Java Edition, `/seed` works in single-player and on servers with permission
In Bedrock Edition, open World Settings and check the Seed field
In Bedrock Edition, use `/seed` if cheats are enabled
On realms or servers, ask the owner or admin for the seed
If you only have the world files, check the world metadata or server config
If using a map tool or launcher, look for the seed in world information