Core KeeperCore Keeper Map Viewer: your world as a map
See your world as a map with the Core Keeper Map Viewer: open your world's .mapparts.gzip file and explore the map you've revealed so far in actual game colors, with biomes, boss and dungeon rings, highlighted ores, custom markers and PNG export. Free, with no sign-up—your world file stays in your browser and is never uploaded.
Built by Justin Schuessler
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Drop world file here or click
*.mapparts.gzip from your Core Keeper world folder
Your world file is read and rendered only in your browser—it is never uploaded or saved.
Features
The Core Keeper Map Tool, right in your browser
No installation, no account: open your world file to get a map you can show, hide, mark and export.
Map in actual game colors
The Map Viewer shows every area of your world you've explored so far, as Core Keeper stores it in the map file. Drag to move the map, zoom with the scroll wheel or buttons, and see coordinates and distance from the Core beneath your cursor.
Color biomes
“Biomes” colors each ring by biome, with adjustable opacity. Once you've explored part of a biome, the tool colors the corresponding ring segment even where you haven't been yet.
Boss and dungeon rings
“Boss Spawns” and “Points of Interest” draw rings at fixed distances from the Core where a boss or dungeon can be found. Only the angle varies randomly between worlds, so the ring shows you where to search.
Highlight ores and blocks
Under “Tile Highlighting”, select tin, iron or gold from the “Ores” category, for example, or choose a liquid, block or object. You can dim the rest of the map.
Custom markers with notes
Place markers with icons and notes for bases, resources or danger zones. They're stored only locally in your browser.
Export the entire map as PNG
Download the entire map as a PNG, including enabled overlays and your markers, to share with your fellow players, for example.
How it works
How to use the Core Keeper Map Viewer
From world file to finished map in seven steps.
Step 1
Open world file
Open your Core Keeper world folder (Steam ID folder → “maps” → character folder) and drag the “*.mapparts.gzip” file into the field, or click the field to select it. If you don't have a file, try the tool with “Load example map”.
Step 2
Explore map
Drag to move the map and zoom with the scroll wheel or buttons. Beneath your cursor, you'll see coordinates and the distance from the Core.
Step 3
Show biomes
Enable “Biomes” in the settings and adjust the opacity. Each ring is colored by biome, even in unexplored areas, once you've explored part of that biome.
Step 4
Show boss and POI rings
Turn on “Boss Spawns” and “Points of Interest”. The rings show the fixed distance from the Core where a boss or dungeon can be found. Only the angle varies randomly between worlds.
Step 5
Highlight ores and blocks
Under “Tile Highlighting”, select an ore, liquid, block or object, such as tin from the “Ores” category. Use the “Rest visible” slider to dim the rest of the map.
Step 6
Place marker
Place custom markers with icons and notes for bases, resources or danger zones. They're stored locally in your browser.
Step 7
Export map as PNG
Download the entire map as a PNG, including all enabled overlays and your markers.
Background
What you should know about the Core Keeper map
Where to find the map file
Core Keeper stores each world's map as a separate “<number>.mapparts.gzip” file, one per character and visited world. On Windows, it's in “%USERPROFILE%\AppData\LocalLow\Pugstorm\Core Keeper\Steam”; on Linux and Steam Deck, it's in “~/.config/unity3d/Pugstorm/Core Keeper/Steam”. From there, open the folder with your Steam ID, then “maps”, then your character's folder.
Explored map, not map reveal
The Map Viewer doesn't reveal terrain you haven't seen yet and isn't a cheat. It shows what's in your map file. Biome coloring (for biomes you've explored in part) and the boss and dungeon rings do extend into unexplored areas, though, showing you where to search next.
World file map or seed map?
The Map Viewer needs your own world file and shows the map you've explored so far. If you want to preview a world from its seed before playing, use the Core Keeper Seed Generator: it shows a terrain and biome preview based on the seed.
Go to the Core Keeper Seed GeneratorDiscover more
More Core Keeper tools
Savegame Editor
Upload your Core Keeper character file to view skills, talents, inventory, and character details, then edit it directly. Adjust items, health, avatar appearance (including gender), and discoveries, and export the file. All in your browser, with no upload to a server.
Built by Justin Schuessler
Server Configuration Generator
Describe your ServerConfig.json settings to the ZapX AI Agent in your own words, or set each option manually—with a live preview for your rented Core Keeper server.
Built by Florian Galz
Seed Generator
Enter a Core Keeper world seed and instantly preview the terrain and biomes in authentic game colors—without owning or exploring the world.
Built by Justin Schuessler
FAQ
Frequently asked questions about Core Keeper Map Viewer
Quick answers about the Core Keeper Map Viewer and your world file.
Open your world's .mapparts.gzip file to see the Core Keeper map you've explored so far in actual game colors, with panning and zooming just like in the game. You also get biome coloring, boss and dungeon rings, highlighting for ores, liquids, blocks and objects, custom markers with notes, and a PNG export of the entire map.
No. Reading, decompressing and rendering happen entirely in your browser. No server request transfers or stores your world file.
On Windows, the folder is at “%USERPROFILE%\AppData\LocalLow\Pugstorm\Core Keeper\Steam” (you can paste this path directly into File Explorer's address bar); on Linux and Steam Deck, it's at “~/.config/unity3d/Pugstorm/Core Keeper/Steam”. Open the folder with your Steam ID (up to 10 digits), then “maps”. Each character has a subfolder there containing a “<number>.mapparts.gzip” file for each world visited. If you've used a Cartography Table in the world, you'll also find the shared map in the “servermaps” folder alongside “maps”.
No. Xbox, PlayStation and Switch don't provide access to the files. The tool therefore works only with the Steam version on Windows or Linux, including Steam Deck.
Not the actual terrain: the Map Viewer shows only areas you've already explored. But “Biomes” colors each ring even in unexplored areas once you've explored part of that biome. “Boss Spawns” and “Points of Interest” draw rings at the fixed distances from the Core where bosses and dungeons can be found. Only the angle varies randomly between worlds, so you know how far from the Core to search.
Open the settings, expand “Tile Highlighting” and select tin or iron from the “Ores” category, for example. Matching areas of your explored map are highlighted, and you can use the “Rest visible” slider to dim everything else. It works the same way for liquids, blocks and objects.
Yes. You can place custom markers with icons and notes for bases, resources or danger zones, for example. They're stored only locally in your browser and linked to that specific world file: open the same file again on the same device, and they'll still be there. They aren't synced to other devices. To share the map, download the whole thing as a PNG with all enabled overlays and your markers.
Yes. Click “Load example map” in the empty upload field. The tool loads a fully explored example world where you can try out biomes, rings, Tile Highlighting, markers and PNG export.
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