When a map is created randomly, how can we find the seed that it has generated ?

I want to find some cool map in single player and when I'll find one, I want to get that seed and create it on my SMP server.

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6 Answers

In 1.3 and above you can type /seed into the console to view it.

However, this is not as good because usually you want the world seed to create another world like it, to share with a friend, and you can't copy/paste it.

For pre-1.3 versions (and for if you want easy copy/paste) go to seedscope.net, then upload your level.dat file, and it will show you your seed.

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If you already have the Single Player Commands mod installed, it's extremely easy to find the seed of your world. Typing the command /world seed will print the seed of your world to the console.

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Without mods or websites, you can view your level.dat file using a program like NBTedit. Your level.dat file contains your seed.

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In Beta-1.8 they are going to implement the ability to see the level seed by pressing F3.

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There is mod available designed to help you find slime spawns. It updates the F3 display ti include the seed. If you update your local client it will find the seed of both your local maps, and for maps on SMP servers.

You can also view the seed and edit it using the program MCEdit.