Special thanks to turtle-insect for creating this editor. I've made no serious changes to their code other than to translate the UI into English.

-- njosnavelin/revnja

Overview

Nintendo Switch OCTOPATH TRAVELER save data editing tool

Official Game Site

http://www.jp.square-enix.com/octopathtraveler/
https://octopathtraveler.nintendo.com/

Prerequisites

• Windows machine
• .NET Framework 4.7.1 runtime
• Octopath Traveler save file

Build environment

• Windows 10 (64 bit)
• Visual Studio 2017

Steps to edit

Acquire save data from Nintendo Switch console.

You should have a set of files that look similar to this:

• KSSaveData 0
• (KSSaveData 1, KSSaveData 2, ...)
• KSSystemData

Save editor will read in KSSaveData (1, 2, 3, etc)
Perform any editing
Write out KSSaveData (1, 2, 3, etc) to file
Import newly edited saveData to Nintendo Switch console

Special Thanks

• https://gbatemp.net/threads/octopath-traveler-save-editing.511125/
• turtle-insect for creating the original save editor