World seed tool
World Seed Reader
Drop a Valheim .fwl (or .fwl2) world file and read its seed back — no hex editor, no upload. The file is parsed entirely in your browser.
Drop your .fwl file here
or choose a file
.fwl or .fwl2 — the small file next to the world’s .db
The file is read locally and never uploaded.
Where is my .fwl file?
A world is two same-named files: a large .db with the terrain and everything you have built, and a small .fwl with the metadata, including the seed. The .fwl is a few hundred bytes, so it is instant to grab. Valheim 1.0 keeps each world in a folder; inside it, _main.N.fwl2 is the metadata file.
- Windows
%USERPROFILE%\AppData\LocalLow\IronGate\Valheim\worlds_local\- Linux / dedicated server
~/.config/unity3d/IronGate/Valheim/worlds_local/
Steam Cloud worlds live under the Steam userdata folder (app id 892970):
<Steam>\userdata\<SteamID>\892970\remote\worlds_local\ Each world is a folder; the seed sits in the _main.0.fwl2 file inside it (e.g. MyWorld\_main.0.fwl2).
Frequently asked questions
- What is a Valheim world seed?
- The short string the world generator builds from. Two worlds made with the same seed get identical terrain, biomes, boss altars and merchant spots. Your buildings, items and progress are not part of it — those live in the .db save.
- Is my file uploaded anywhere?
- No. The file is opened with the browser’s own file API and parsed on your machine. Load the page, cut your internet connection and the tool still works.
- Why did a typed-in seed give me a different world?
- Seeds are case-sensitive (HHcCkkJYYq and hhcckkjyyq are different worlds), and characters like 0/O and l/I are easy to mix up by hand. Reading the seed straight from the .fwl removes the guesswork.
- Is this an official Iron Gate tool?
- No. This reader follows the community-documented .fwl layout, which has stayed the same across world versions so far.