Upload, switch and start fresh worlds

A world is two files

Every Valheim world is two files sharing one name:

Serverk.db: everything built in the world, every chest and every tamed animal
Serverk.fwl: the world seed and its rules (the preset and the modifiers)

They belong together. Upload a .db without its .fwl and Valheim treats the world as new and rolls a different seed, and everything built disappears.

Upload the world from your own game

The world you played solo lives on your machine at:

%USERPROFILE%\AppData\LocalLow\IronGate\Valheim\worlds_local

On Linux:

~/.config/unity3d/IronGate/Valheim/worlds_local

Close Valheim first so the world is written out completely
Open the Worlds tab in the panel and press Upload a world
Pick both files together: the .db and the .fwl
Press Activate on the world once it appears in the table
Restart your server, or start it if it's stopped

Stop your server before uploading. World files can't go in while it runs, and we tell you if you try.

Existing world files can't be replaced. If a name is already taken, give both the .db and .fwl files the same new name before uploading.

Switch between worlds

Every row in the table has an Activate button. Activating changes which world your server runs, and it applies after a restart. The old world stays exactly where it is, so switch back whenever you like.

You can't delete the selected world. Activate another one first, then delete it. Deleting takes a backup first, and if your server is running we stop it and start it again for you. A failed backup stops the delete.

Start a fresh world

From the same tab, Create a world: type a new name and Valheim generates a complete world under it the next time your server restarts. Your current world stays in the table.

The preset and the modifiers (under Settings) are written into the .fwl the first time that world runs. Changing them later needs at least one start to stick, and clearing them doesn't restore the defaults, so you have to pick the default value yourself.

Backups

You have two layers:

Valheim's own backups: kept by Valheim inside the world folder. The count and the timing are in the settings
Your Serverk backups: taken automatically, or by you on demand, and they're the ones that restore in one click

Valheim has no manual save command. A backup archives the last autosave, so with a save interval of 1800 seconds you can lose half an hour. Lower it if your server is busy.

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