Valheim Tools
Upload a .fwl or Valheim 1.0 .fwl2 file,
change world modifiers, and download the updated file.
Processing stays in your browser; nothing is uploaded.
Valheim stores world modifiers in a small metadata file,
separate from the world itself. On Valheim 1.0 that file
is _main.<N>.fwl2 inside the world
folder. Older worlds still use a .fwl next
to the .db. If you picked the wrong difficulty
when creating a world, or want to dial raids up or down
later, edit that file instead of starting over.
This tool reads your file locally, lets you apply a preset
or change individual settings, and gives you a modified
file to put back in the same place. Joined players stored
in a .fwl2 are left as they were. No account
needed. See also our
other Valheim tools.
Click to upload or drag and drop
Accepts .fwl and .fwl2 world metadata files
.config/unity3d/IronGate/Valheim/worlds_local/<WorldName>
and upload _main.N.fwl2 for the highest
N that also has a matching
_main.N.ok file. That is the save the game loads.
.fwl
next to the .db in
worlds_local.
.db, .db2, and
.chunk files alone. Modifiers are not stored in them.
Five levels: Very Easy, Easy, Normal, Hard, and Very Hard. Easier levels raise the damage you deal and lower enemy damage. Hard and Very Hard do the opposite, and enemies are a bit larger and faster. Very Easy fits a building world. Very Hard is the high-challenge end.
Sets skill loss and what you drop on death. Casual keeps equipped gear and lowers skill loss. Very Easy and Easy also lower skill loss. Normal is the usual loss. Hard raises skill loss and deletes unequipped items. Hardcore deletes your items and resets skills. Most co-op servers stay on Normal or Easy.
Multiplies what you get from nodes and drops: ×0.5, ×0.75, Normal, ×1.5, ×2, or ×3. A higher rate means less grinding when you are mostly building.
How often events such as greydwarf raids fire: None, Much less, Less, Normal, More, or Much more. None turns them off when raids keep wrecking a base mid-project.
Portal items lets you carry ore and metal through portals. No boss portals blocks travel to boss arenas; No portals shuts them down entirely.
These flags change rules without moving the difficulty sliders.
AleForge hosts Valheim worlds if you would rather not manage the files yourself.
Valheim at AleForge
World metadata: name, seed, and modifier settings. Before
Valheim 1.0 that file is a .fwl next to the
.db. On 1.0 it is _main.N.fwl2
inside the world folder. The .db and
.db2 hold terrain, builds, and player data.
Yes. Edit the metadata file, replace it, and restart. Your
base and inventory stay in the .db or
.db2.
No. The file is read and written in your browser only. Back up before you overwrite anything on disk.
Easy, Hard, Hardcore, Casual, Hammer mode, Immersive, and Reset to normal. You can still tweak each dropdown after applying a preset.
No. Modifiers live only in the .fwl or
.fwl2. Leave .db,
.db2, and .chunk files alone.