Deltarune Save Editors Compared: Tenna, Spamton Save Editor, GameSaveEditor and deltaruneeditor.com

Tenna Editor — the most complete option

Tenna Editor (tennaproject.com) was written as an answer to Spamton Save Editor, and it shows: the interface is a modern web app with tabs for inventory, party, Light World, story, recruits and an advanced flag editor. It keeps a library of saves in the browser, installs as a PWA so it works offline, and adapts the visible tabs to the chapter it detected. Its README is refreshingly blunt about what is unfinished — Chapter 5 flags and plot points are not mapped yet, and console versions are unsupported.

Two practical points. It is genuinely open source under the zlib license, so anyone can check what it does with a file. And it is actively developed — the last push we saw was October 19, 2026.

Choose it if you want one tool for every chapter, a save library, or offline use on a phone or laptop.

Spamton Save Editor — the original

saveeditor.spamton.com is the editor a lot of the community learned on: a static site on GitHub Pages, one page per chapter, plain dropdowns wired to line numbers. It reads your file in the browser with the FileReader API and never posts it anywhere. It covers Chapters 1 to 4, and it treats the free Chapter 1 & 2 demo saves as separate chapters with their own pages — which is more than most tools do.

What it does not do is keep up. Chapter 5 has no page there, the repository has not been pushed since April 28, 2026, and the front page now sends players to Tenna for a more complete tool. That self-assessment is fair.

Choose it if you are replaying Chapters 1–4, prefer the most minimal interface possible, or need the demo-save pages.

GameSaveEditor — the readable one

gamesaveeditor.org's Deltarune page is the most honest piece of documentation among the four: it prints the opening lines of a real save, names what sits on each of them, and explains why one missing line shifts every field after it. Its FAQ covers the questions that actually trip people up — the trailing space after most values, why the fourth character sits at 0 HP on a fresh file, and why Dark World and Light World money are separate.

It says parsing and export both happen in the browser and that it only overwrites the lines it understands. We did not audit its code, so that stays a claim rather than a finding. It is not open source.

Choose it if you want to understand the file format while you edit, or you just want a clean page with no extra features in the way.

deltaruneeditor.com — this site

This one is ours, so weigh it accordingly. It covers Chapters 1–5 with name tables for the Chapter 5 release, exposes the 72-slot storage box that Chapters 2 and later added, shows Light World stats as well as Dark World ones, and lets you edit play time — useful after restoring a backup. It also keeps a running list of what you changed, with per-line undo and a reset, so a mistake does not mean starting over from the file.

Its real distinction is damaged saves. The format is unforgiving: one missing or extra line shifts every field after it, and older editors refuse to open such a file. This editor compares the line count with the expected 10,318 or 3,055 and repairs files that are within 5% of it, then tells you it did.

What it does not have: it is not open source, it has no save library, no PWA, no Chapter 5 flag labels (you get raw flag values), and console saves are out — as they are everywhere, because consoles give you no access to the file. Our how-to guide covers the backup routine and the failure modes; the save file location guide has the paths for every OS.

Choose it if your save is truncated, you need Chapter 5 tables, or you want the storage box and raw flags on one page.

How this comparison was made

Every claim above comes from the tools' own public pages, README files or repositories, read on October 29, 2026. We did not import our test saves through the other three editors, and we did not try their exports in the game, so their field-level behaviour is reported as they describe it. Nothing here is paid placement, and we have not ordered the list to put ourselves first.

One thing this page deliberately does not claim: a game version number. Deltarune save files carry no build string — the file is a flat list of values with no header — so a version label on any editor page would be guesswork. What we can date is our own format check: on October 29, 2026, real full-release saves from Chapters 1–5 were opened, edited and re-exported in our editor, and only the edited line changed. That is the claim, and it is repeatable.

If any of the other three tools changes what it supports, the practical check takes a minute: open your own save, look at whether the fields you need are named, and export to a new file instead of overwriting. Whatever the page says, the file tells you the truth.