Decrypt .sav files to .json for manual editing, or encrypt .json back to .sav
⚠️ Important Notice: Large files may take more time to decrypt/encrypt. Maximum file size is 30MB. Always backup your original save files before processing.
🔓 Decrypt Save File (.sav → .json)
Upload your encrypted Fallout Shelter save file (.sav) to decrypt it into a readable JSON format. This allows you to manually edit the save data using any text editor.
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Choose .sav File to Decrypt
Click here or drag & drop your Vault1.sav, Vault2.sav, or Vault3.sav file
Supported: .sav files (max 30MB)
How it works: The decryptor will convert your encrypted .sav file into a human-readable .json file. You can then edit the JSON manually and re-encrypt it back to .sav format.
🔒 Encrypt Save File (.json → .sav)
Upload your edited JSON file to encrypt it back into the Fallout Shelter save format (.sav). Make sure your JSON is valid before encrypting.
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Choose .json File to Encrypt
Click here or drag & drop your edited JSON file
Supported: .json or .txt files (max 30MB)
How it works: The encryptor will validate your JSON and convert it back to the encrypted .sav format that Fallout Shelter can read. The file will automatically download when ready.
📖 How to Use the Decryptor
Backup First: Always create a backup copy of your original save file before processing
Decrypt: Upload your .sav file to decrypt it to .json format
Edit: Open the .json file in any text editor and make your changes
Validate: Ensure your JSON is valid (use a JSON validator if needed)
Encrypt: Upload the edited .json file to encrypt it back to .sav
Replace: Replace the original save file with your new encrypted .sav file
Need help finding your save files? Check our platform-specific guides for detailed instructions on locating save files on PC, Steam, Android, and iOS.
🤔 When to Use the Decryptor
Advanced Editing: Make changes not available in the web editor
Batch Operations: Use scripts or tools to modify multiple values at once
Debugging: Inspect the raw save data structure
Backup Analysis: Compare different save states
Custom Modifications: Add or modify data fields manually
⚠️ Advanced Users Only: Manual JSON editing requires understanding of the save file structure. Invalid JSON or incorrect data can corrupt your save. Use the main Fallout Shelter Save Editor for easier, safer editing. New to save editing? Start with our beginner-friendly tutorial.