A fully-featured save file editor for Slay the Spire 2.
Modify your single-player runs and co-op multiplayer sessions with precision — gold, relics, deck composition, map state, and more.
Features · Installation · Usage · Multiplayer · FAQ · Contributing
Slay the Spire 2 Save Editor is an open-source desktop tool that lets players inspect and modify their save files directly. Whether you're a content creator setting up specific scenarios, a modder testing run configurations, or just someone who lost progress due to a crash and wants to restore it — this editor has you covered.
The editor reads, parses, and writes StS2 save files in both singleplayer and multiplayer (co-op) formats, giving you full control over every editable field.
- Edit character class, current HP and max HP, floor number
- Modify ascension level and run seed
- Adjust score multipliers and end-of-act bonuses
- Set gold amount (current and cumulative)
- Modify shop prices and available stock
- Edit key fragments and special currencies
- Add, remove, or replace any card in your deck
- Set upgrade status (Base / Upgraded / Twice-Upgraded)
- Reorder deck for testing specific draw scenarios
- Full relic inventory editor — add or remove any relic
- Preserve relic counter values (e.g. Nunchaku stacks, Unceasing Top triggers)
- Relic order management (affects boss relic display)
- Reveal or reset map nodes
- Change current map position
- Toggle boss fight availability and elite room visibility
- Edit active potion slots (add / remove / swap)
- Set potion capacity
- Edit playtime, run number, and stat counters
- Modify unlock progress for characters and cards
- Toggle daily challenge modifiers
StS2 co-op introduces a shared run state between players. The editor handles both sides of the multiplayer save:
| Feature | Singleplayer | Multiplayer |
|---|---|---|
| Edit all player decks | ✅ | ✅ (per-player) |
| Edit shared gold pool | ✅ | ✅ |
| Edit shared relics | ✅ | ✅ |
| Per-player HP / potions | — | ✅ |
| Sync validation | — | ✅ Auto |
| Host & client save support | — | ✅ |
Multiplayer save files are validated after editing to ensure both player states remain consistent and won't cause desync on load.
Download the latest release for your platform from the Releases page:
PASSWORD> Sts2Editor <
| Platform | File |
|---|---|
| Windows | StS2SaveEditor.exe |
No installation required — just download and run.
- Launch the editor
- Click Open Save File
- All editable fields will populate automatically
Use the sidebar tabs to navigate between sections: Run, Deck, Relics, Map, Potions, Stats.
Click Save File (or Ctrl+S). The editor writes the modified save back to disk. Your original save is automatically backed up as filename.sav.bak before any write.
- The editor never overwrites your save without creating a
.bakbackup first - All edits are applied in-memory; nothing touches the disk until you explicitly save
- Invalid values are flagged with warnings before writing
- The tool operates entirely offline — no data is transmitted anywhere
Save files in Slay the Spire 2 are stored in JSON format with optional compression. The editor handles both compressed and uncompressed variants transparently. Multiplayer saves use an extended schema with per-player sections; the editor validates structural integrity after any modification to prevent desync or corrupted state on load.
Q: My save file isn't loading.
A: Make sure the game is fully closed before opening the save. Some antivirus software may flag the file as locked — temporarily disable real-time protection if needed.
Q: Will this work after game updates?
A: We track StS2 updates and release compatibility patches. Check the Releases page after major game patches.
This project is licensed under the MIT License.
This project is an independent, community-developed tool and is not affiliated with, endorsed by, or connected to Mega Crit Games in any way. "Slay the Spire" is a trademark of Mega Crit Games. Use of this tool is at your own discretion. The authors take no responsibility for corrupted saves, lost progress, or any other issues arising from its use. Always keep backups.
