Slay the Spire 2 Save Editor v0.100

A web-based save file editor for Slay the Spire 2. Edit your save files directly in your browser with support for single-player and multiplayer saves.

Try it online

Features

• Upload and edit .save files from Slay the Spire 2
• Support for schema versions 14-15 (backward/forward compatible)
• Support for both single-player and multiplayer save formats
• Drag-and-drop file upload
• Edit run-wide settings:
  • Ascension level (difficulty 0-20)
  • Run modifiers (enable/disable run modifiers)
• Edit player data:
  • Player stats (HP, Gold, Energy, Potion slots, Orb slots)
  • Deck (add/remove/upgrade cards)
  • Relics (add/remove relics)
  • Potions (add/remove potions)
  • Discovered cards/relics (unlock new items)
  • Orb slots (for Defect character)
• Browse and add items with filtering by color, rarity, type, cost
• Rich text descriptions with color formatting
• Graceful handling of unknown/missing cards (preserves data)
• Data validation to prevent save corruption
• Download edited saves back to file system with original schema preserved

How to Use

1. Open the application in your web browser
2. Click Upload .save or drag your save file into the upload area
3. Edit run settings (affects entire run):
   • Ascension Level: Set difficulty from 0-20
   • Run Modifiers: Add or remove active modifiers
4. Edit player data:
   • Stats: HP, Gold, Energy, Potion Slots, Orb Slots (Defect only)
   • Deck: Add/remove/upgrade cards by color
   • Relics: Add/remove relics by pool
   • Potions: Add/remove potions
   • Discovered Items: Unlock new cards and relics for future runs
5. Click Download .save to save your changes (preserves original schema version)

Finding Your Save Files

Save files are typically stored at:

%APPDATA%\SlayTheSpire2\steam\<SteamID>\profile1\saves\

Common file names:

• current_run.save - Your current run
• current_run_mp.save - Multiplayer run

Browser Requirements

• Modern browser with ES6 module support
• Local file access capabilities

Installation

1. Clone the repository
2. Open index.html in a web browser
3. No server or build process required

Run Locally (Scripts)

You can also start a local web server from the project root:

• Windows: run-local-windows.bat
• Linux: run-local-linux.sh
• macOS: run-local-mac.sh

Optional port argument:

• Windows: run-local-windows.bat 8080
• Linux: ./run-local-linux.sh 8080
• macOS: ./run-local-mac.sh 8080

For Linux/macOS, make scripts executable once:

chmod +x run-local-linux.sh run-local-mac.sh

Project Structure

├── index.html              # Main application file
├── css/
│   └── style.css          # Application styles
├── js/
│   ├── app.js             # Main application entry point
│   ├── ascension-editor.js # Ascension level editor
│   ├── constants.js       # Game constants and configs
│   ├── data-store.js      # Save file data management
│   ├── deck-editor.js     # Deck editing functionality
│   ├── discovered-items-editor.js # Discovered cards/relics management
│   ├── item-browser.js    # Item selection UI modal
│   ├── modifiers-editor.js # Run modifiers editor
│   ├── orbs-editor.js     # Orb slots editor (Defect)
│   ├── player-editor.js   # Player info editing
│   ├── potion-editor.js   # Potion management
│   ├── relic-editor.js    # Relic management
│   ├── save-manager.js    # File I/O and save operations
│   └── utils.js           # Utility functions
├── data/
│   ├── cards.json         # Card database
│   ├── characters.json    # Character data
│   ├── potions.json       # Potion database
│   ├── relics.json        # Relic database
│   ├── modifiers.json     # Run modifiers database
│   ├── orbs.json          # Orb types database
│   └── ascensions.json    # Ascension levels database
└── static/
    └── images/            # Game asset images

Schema Version Support

The editor supports schema versions 14-15 and is backward compatible:

• Schema v14 & v15: Fully supported
• Older versions: May not load correctly
• Newer versions: Will load but may have unsupported fields
• Download preserves version: Original schema version is maintained when saving

Notable Features

• Unknown Cards: If a card/relic/potion is not in the database, it's displayed as "Unknown" but fully preserved when saved
• Rich Text Support: Descriptions use color formatting ([gold], [blue], etc.)
• Defensive Design: No data loss on missing database entries
• Multiplayer Support: Edit both single-player and multiplayer saves
• Form Validation: Prevents values outside safe limits (HP, Gold, etc.)

Warning

Always backup your save files before editing. While the editor includes validation to prevent corruption, use at your own risk.

Credit

Assets and data files provided by spire-codex

License

See LICENSE for details.