Undertale PC/Switch Save File Converter V2.1

Inspired by JonyLuke's Undertale Save Converter (https://github.com/jonyluke/Undertale-save-converter). This version is a complete re-write, and features full bi-directional conversion functionality.

Project page on the GBATemp Forum

Requirements

• Undertale
• A Modded Nintendo Switch
• Python3.4 (https://www.python.org/downloads/) - Optional (Note: This is only required if you want to compile the undertale_save_converter.exe file yourself, or if you want to run undertale_save_converter.py directly)

Installation and Usage

1. Download the latest release from https://github.com/tomchapin/undertale-save-converter/releases
2. Save it to a folder on your local computer.
3. Copy your game save files to the same folder.

Converting from PC to Switch

1. Make sure you have copied your game's file0, file9, and undertale.ini files into the folder with the undertale_save_converter.exe file. (These files are typically located in your system's %LocalAppData%\UNDERTALE\ folder)
2. Use your command prompt to browse to the folder, then execute undertale_save_converter.exe and select the first menu option.
3. Alternately (if you want to run the script via python), execute python undertale_save_converter.py (requires Python 3 to be installed).

Converting from Switch to PC

1. Make sure you have the undertale.sav file copied from your Nintendo Switch placed in the folder with the undertale_save_converter.exe file. This file can be obtained from a modded switch by using tools such as Checkpoint or JKSM.
   • Checkpoint: https://gbatemp.net/threads/checkpoint-a-simple-and-fast-save-manager.485591
   • JKSM: https://github.com/J-D-K/JKSM
2. Use your command prompt to browse to the folder, then execute undertale_save_converter.exe and select the second menu option.
3. Alternately (if you want to run the script via python), execute python undertale_save_converter.py (requires Python 3 to be installed).

Compiling the executable (if you don't want to download and use the supplied undertale_save_converter.exe file)

1. Install Python 3.4 (x86) on a Windows computer, making sure you select the option to add Python to your path.
2. Install the Py2Exe utility (py -3.4 -m pip install py2exe) - https://pypi.org/project/py2exe/
3. Install pywin32-221.win32-py3.4.exe from https://sourceforge.net/projects/pywin32/files/pywin32/Build%20221/
4. Check out this git repo to a folder on your local computer.
5. Browse to the folder and execute py -3.4 -m pip install -r requirements.txt (to install dependencies).
6. Execute py -3.4 -m py2exe.build_exe undertale_save_converter.py to compile the undertale_save_converter.py file to an .exe file.
7. Look inside the dist folder for your newly created undertale_save_converter.exe file!