01
Mod remover
Finds every mod object in the save and cleanly removes the mods you pick – including contents, networks, references and extra files.
Tools · Save game
Save game tools
A mod is gone and the world no longer loads? The save broke after a crash? You want to know what slows your station down? These four tools open your .save file right in the browser, show what is inside and, if needed, create a new, edited copy.
-
Runs only in your browser
Your save is not uploaded. It is read and processed on your device; the page sends no data from it anywhere.
-
Back up first
Copy the whole world folder before you put an edited file in place. Guide
-
Unofficial
Not a tool by RocketWerkz. Use at your own risk. Disclaimer
02
Save rescue
Checks for typical damage: duplicate IDs, broken references, NaN values, truncated files, missing required files. Repairs what can be repaired safely.
03
Save game editor
Change world name, difficulty, names, stack sizes and gas fillings. Every change is logged and can be undone.
04
Save analysis & lag check
Counts objects, loose items, networks and atmospheres, draws charts and tells you what costs performance – with a text for a support ticket.
What is inside a .save file?
A .save file is a ZIP archive. When loading, the game extracts it into a temporary folder and then reads the individual files:
-
world_meta.xmlHeader data for the load menu: world ID, game version, save time, days passed, counters. -
world.xmlThe actual world as XML: every object (each with ReferenceId, PrefabName and save type), rooms, pipe and cable networks, atmospheres, weather and terrain checksums. -
terrain.datThe modified terrain (digging, drilling) in binary form. The tools never change this file. -
preview.png · screenshot.pngPreview images for the load menu. -
Atomkraftwerk.json · …Extra files from mods, e.g. Atomkraftwerk.json or Weltkarte.json.