Unity.jsonJSON (character) + gzip binary (world)

Core Keeper Save Editor

Edit your Core Keeper character save — max health, Ancient Coins, all 12 skills, hardcore status and world difficulty.

Files encrypted in transit

Server-side parsing

Auto-detect format

About Core Keeper Saves

Core Keeper (Pugstorm) stores each character in a plain-text JSON file (since update 0.5.1.0) under the Pugstorm\Core Keeper\Steam\<steamid>\saves folder, named by save-slot index. This editor reads that JSON so you can adjust max health, Ancient Coins, skill levels, character type (Standard/Hardcore) and the Souls unlock flag. World and map files (.world.gzip / .mapparts.gzip) use a proprietary compressed binary format and are not editable, but the plain-text .worldinfo file (name, seed, difficulty) is supported. Back up with Ctrl+Alt+B in the main menu and edit only while the game is closed so Steam Cloud doesn't overwrite your changes.

What You Can Edit

Max Health

Ancient Coins

All 12 skill levels (0–100)

Character Type (Standard / Hardcore)

Souls Unlocked flag

World Name (.worldinfo)

World Seed (.worldinfo)

World Difficulty

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Core Keeper Editor

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How to Edit Core Keeper Saves — Step by Step

In Core Keeper's main menu press Ctrl+Alt+B to back up your saves, then fully close the game.

Open %USERPROFILE%\AppData\LocalLow\Pugstorm\Core Keeper\Steam\<steamid>\saves (enable 'Show hidden files').

Upload the character file for your slot (0.json = top slot, 1.json = second, etc.).

Edit max health, coins, skills, character type or flags, or load a .worldinfo file to change name/seed/difficulty.

Download the edited file and drop it back into the saves folder, replacing the original.

Disable Steam Cloud for Core Keeper so your edits aren't overwritten on launch.

Save File Locations

🪟

Windows

%USERPROFILE%\AppData\LocalLow\Pugstorm\Core Keeper\Steam\<steamid>\saves\

🍎

macOS

Not officially supported (no native macOS build).

🐧

Linux

~/.config/unity3d/Pugstorm/Core Keeper/Steam/<steamid>/saves/

☁️

Steam Cloud

Steam Cloud syncs saves on launch/close — disable it before editing to prevent overwrites.

Character files live client-side; AppData is hidden by default.

File format: JSON (character) + gzip binary (world) | Extension: .json

Platform Compatibility

🖥️

Supported

🎮

PS4

Not Supported

🎮

PS5

Not Supported

🎮

Xbox

Not Supported

🕹️

Switch

Not Supported

⚠️ Console versions use sandboxed system storage, so their saves can't be edited with this browser tool — PC only.

How SaveEditor Handles Core Keeper Files

Auto-Detect

Automatically identifies JSON (character) + gzip binary (world) format from file content

Smart Editing

Game-specific labels, categories, and quick-edit presets

Re-encode

Downloads in the original format — compression and encoding preserved

Frequently Asked Questions

Where are Core Keeper save files stored?

On Windows: %USERPROFILE%\AppData\LocalLow\Pugstorm\Core Keeper\Steam\<steamid>\saves. Character data is in <slot>.json files, worlds in /worlds (.world.gzip).

Can I edit health, hunger, or my inventory items?

The character JSON exposes max health, coins, skills and flags. Current health and the hunger meter are runtime values kept in the binary world file, so they usually aren't in the JSON.

My edits keep getting reverted — why?

Steam Cloud re-syncs your old save on launch. Edit only while the game is fully closed, and disable Steam Cloud for Core Keeper.

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