Combat
Makes enemies hit harder and take more damage to kill. Very Easy is good for build-heavy worlds; Very Hard if you want every swamp trip to matter.
Valheim Tools
World Modifiers Editor
Upload a .fwl file, change world modifiers,
and download the updated file. Processing stays in your
browser; nothing is uploaded.
Valheim stores world modifiers in the .fwl
file, separate from world data in the
.db file. If you picked the wrong difficulty
when creating a world, or want to dial raids up or down
later, you can edit the FWL instead of starting over.
This tool reads your file locally, lets you apply a preset
or change individual settings, and gives you a modified FWL
to drop back into
worlds_local. No account needed. See also our
other Valheim tools.
Select World FWL File
Click to upload or drag and drop
Accepts .fwl world metadata files
- World name
- —
- Seed
- —
- File
- —
Presets
Modifiers
Optional flags
How to use it
-
Open
.config/unity3d/IronGate/Valheim/worlds_localand find your world's.fwlfile. -
Upload the
.fwlonly. The.dbis your world data; you do not need it here. - Pick a preset or change settings by hand.
-
Download the new file and overwrite the old
.fwl(same name). - Restart Valheim so it picks up the changes.
What each setting does
Death penalty
Controls skill loss on death, from none (Casual) up to Hardcore. Most groups land on Normal or Easy.
Resource rate
Multiplier on what you get from nodes and drops. Handy when you are past the grind and mostly building.
Raid rate
How often events like greydwarf raids fire. Turn it off if raids keep wrecking your base mid-project.
Portals
Portal items lets you carry ore and metal through portals. No boss portals blocks travel to boss arenas; No portals shuts them down entirely.
Optional flags
No build cost removes material requirements. Player based raids ties events to player activity. Passive enemies stops mobs from aggroing. No map hides the minimap.
Running a server?
AleForge hosts Valheim worlds if you would rather not manage the files yourself.
Valheim at AleForgeCommon questions
What is an FWL file?
World metadata: name, seed, and modifier settings. Not
the same as the .db, which holds terrain,
builds, and player data.
Can I change modifiers on a world I already started?
Yes. Edit the FWL, replace the file, restart. Your base
and inventory in the .db stay put.
Does this upload my save?
No. The file is read and written in your browser only. Back up before you overwrite anything on disk.
Which presets are there?
Easy, Hard, Hardcore, Casual, Hammer mode, Immersive, and Reset to normal. You can still tweak each dropdown after applying a preset.
Do I edit the .db file too?
No. Modifiers are FWL-only. Touch the
.db and you risk corrupting the world.