About
Why this editor exists
Most Deltarune save editors were built for Chapter 1, designed for desktop only, and some asked you to upload your save file to a stranger's server. When Chapters 3 and 4 launched on June 5, 2025, players deserved something better: a modern, mobile-friendly, privacy-first Deltarune save editor that covers Chapters 1-4 of the full release.
This site is that editor. It is free, requires no sign-up, and treats your save file the way a save editor should — as your data, on your machine.
What makes it different
- 100% local processing. Your save is read with the FileReader API and edited in your browser's memory. Nothing is ever uploaded.
- Automatic chapter detection. The editor figures out which chapter a save belongs to when the file loads, with a manual chapter switcher when you want control.
- Full inventory editing. Pockets, equipment, key items — plus the 72-slot storage box in Chapter 2 and later.
- Raw flag browser. Power users can view and flip any story flag directly, not just the ones with friendly labels.
- Built to be forgiving. It validates your save before writing and can repair slightly broken files that older editors refuse to open.
Get started
Open the Deltarune save editor, or learn the ropes first: where your save file lives, the step-by-step usage guide, and the Spamton save editor for grabbing both of Spamton NEO's rewards.