Open on your PC and locate your Pre-Sequel save.
Use the to export the save as a .json or raw file.
Open this file in a tool like .
For those specifically looking to mod their "Profile" (which contains Golden Keys, Badass Rank, and Skins) rather than a specific character, tools like the can be used.
Use a PC and free tools like and Gibbed to mod that PS3 save.
Modify your level, currency, or gear, then save the changes.