SaveSplice · Native save editor for macOS

Your saves, under your control.

Inspect and edit supported game saves in a native Mac workspace. No uploads, no accounts, and no changes to your original file.

Download SaveSplice See the app

macOS 27.0 or later · Save editing works offline.

What SaveSplice does

Open or drop a save and let SaveSplice detect its format. Use Quick Edit for detected fields, Structure for the searchable value tree, or Source for the JSON editing representation.
Review edits in Changes, compare another save, and undo or redo applied edits before exporting.
Find save locations and editing presets in an offline library of 26 games. Reuse edits with local templates, or enable optional local export history.
Edit supported Ren'Py variables and persistent values without executing Python code. Sign exports with your own keys, or use Repack & Sign to export a signed or unsigned copy without changing game state.

Compatibility

SaveSplice requires macOS 27.0 or later and accepts save files up to 50 MB. Workflows cover RPG Maker, Unity, Ren'Py, Unreal Engine, Palworld, GameMaker, NaniNovel, and generic formats.

Supported formats include JSON, INI/CFG, CSV/TSV, YAML, SQLite, and supported binary and compressed saves. Editing limits depend on the format: some saves allow only existing values to change, while unsupported variants are read-only or rejected. Palworld world saves are read-only.

Library presets are guidance, not a guarantee that every game version or save variant can be edited. SaveSplice does not bypass encryption, authentication, or checksums it cannot regenerate. Keep backups and verify edited saves in the game.

Originals stay safe

Export Save defaults to a ZIP containing both the untouched original and the edited save. You can choose an edited copy instead; opened originals are protected from overwrite.

Local history is off by default. Enabling it retains up to ten original and edited export pairs on this Mac. Templates also stay local and respect each format's editing restrictions.

Only import your own Ren'Py signing keys and sign saves you trust. Signing or removing signatures does not make unsafe game state safe. Imported keys stay in this Mac's non-synchronizing Keychain; one-off Repack keys are not retained.

Screenshots

Scroll through the app, or open a screenshot and use the arrows to browse.

SaveSplice Save Editor with a local save drop zone and engine and format workflows. — Save Editor

SaveSplice offline Game Library listing games with save locations and compatibility guidance. — Game Library

SaveSplice Local Edit History with optional export history switched off. — Local Edit History

SaveSplice Edit Templates for reusing edited values within the same format and game preset. — Edit Templates

SaveSplice Ren'Py Repack and Sign workspace for exporting signed or unsigned save copies. — Repack & Sign

Privacy and support

Parsing, editing, comparison, and signing run locally. SaveSplice does not upload saves, templates, diagnostics, or signing keys, and it has no analytics or accounts.

Manual or enabled automatic update checks contact update.mamei.dev, which receives ordinary request information such as your IP address and app version. Save editing needs no network connection.

Need help? Contact SaveSplice support. The app also includes a Privacy & Support window under Help.