NMSE (No Man's Save Editor)

NMSE (No Man’s Save Editor) is a free, open-source desktop utility for changing No Man’s Sky save data. It suits players who need detailed control over inventories, progression, discoveries, or character statistics across PC and console save formats. Its broad coverage and built-in recovery options are compelling, while Wine-dependent builds reduce its appeal on Linux and macOS.

Overview

NMSE is dedicated to No Man’s Sky rather than serving as a general save-file tool. It can modify inventories, unlock items, alter discoveries, edit progression and character statistics, and create backups that can be restored later. Support extends to Steam, GOG, Xbox Game Pass, PlayStation 4, and Nintendo Switch saves, so its usefulness is not limited to one computer storefront.

This is a fan-made project under the GPL 3.0 license and is not affiliated with Hello Games. That independent status makes careful backup handling important, even though backup and restore functions are built into the application.

Key features

Inventory and progression controls

The visual inventory grid gives item editing a clearer workflow than raw value manipulation. Drag-and-drop management, automatic stacking, and sorting are practical for reorganizing a crowded save or correcting missing items. Progression editing, discovery changes, item unlocks, and character-stat controls make the editor suitable for repairing an interrupted playthrough or deliberately customizing one. These are powerful changes, so NMSE is better for users comfortable taking responsibility for their own save files than for anyone seeking an in-game convenience layer.

Backup and interchange

A backup picker and restore function provide a direct way to return to an earlier state if an edit has an unwanted result. NMSE also supports cross-editor-compatible import and export of practically everything, which is valuable when a player moves between community tools or wants to preserve data in another editor’s workflow.

Language coverage

Support for all 16 game languages avoids tying the editor to an English-only save experience and makes it more practical for international players.

Pricing

Plan	Price	Includes
NMSE	free	Free and ad-free desktop save editor

There is one plan, no paid tier, and no trial period because the software is free to use. The maker says NMSE will remain free and ad-free, so users do not trade features or quotas for the zero price. This is an especially strong fit for occasional save repair and for players who need broad platform support without an ongoing subscription.

Platforms

Windows users receive a ZIP release, making the desktop build a straightforward fit for that operating system. Linux is served by an AppImage that includes Wine, while macOS uses a DMG with a Wine launcher; both non-Windows versions therefore run through compatibility layers rather than native platform code. That arrangement broadens access, but users who prioritize native desktop integration may prefer a tool built directly for their operating system.

The save formats cover Steam, GOG, Xbox Game Pass, PlayStation 4, and Nintendo Switch. NMSE edits existing No Man’s Sky saves across those ecosystems; it does not replace the need to obtain or transfer a save from the relevant game platform.

Who it's for

Choose NMSE if you play No Man’s Sky on one of its supported save platforms and want granular control over inventory, progression, discoveries, unlocked items, or character statistics. It is also a good match for players who value restorable local backups and exchange files with other compatible editors. Windows users get the least complicated deployment. Linux and macOS users can use it, but should be comfortable with Wine-based execution. It is not the right choice for someone seeking a multi-game editor or a native, platform-specific macOS or Linux application.

Pros and cons

Pros

• Wide No Man’s Sky coverage: Steam, GOG, Xbox Game Pass, PlayStation 4, and Nintendo Switch saves are supported.
• Detailed editing: Inventory, progression, discoveries, unlocks, and character statistics can all be changed.
• Useful inventory workflow: A visual grid, drag-and-drop handling, auto-stacking, and sorting make substantial reorganizing manageable.
• Recovery built in: Backup selection and restore reduce the risk of an irreversible mistake.
• Free and ad-free: The sole plan costs nothing with no paid upgrade path.

Cons

• Wine on Linux and macOS: Compatibility-layer launches may be less appealing than a native build.
• Single-game focus: Its editing scope is limited to No Man’s Sky saves.
• Independent fan project: It is unaffiliated with Hello Games, and support is directed to Discord for community help and GitHub issues for bug reports.

Alternatives

For a wider catalogue of tools, browse Game Save Editors. Palworld Save Pal is the better pick when you need a free Palworld editor with every feature included across Android, iOS, Linux, macOS, web, and Windows.

Choose SaveEditor.top when a browser-accessible or desktop tool with no registration suits you and your files stay within its 50MB-per-file limit. Fallout Shelter Save Editor fits Fallout Shelter players who want a browser-based, account-free, ad-free, no-telemetry MIT-licensed tool.

Pokémon SRM Editor is the relevant choice for Pokémon Red, Blue, and Yellow saves, with both web and desktop versions. Elden Ring SaveForge is a free Windows alternative for Elden Ring saves. NHSE suits users working with an existing save who do not need console dumping or importing. RPGMaker Save Editor is the focused option for RPGMaker files on Linux, macOS, and Windows. ACNH Save Editor is a free self-hosted alternative for Animal Crossing: New Horizons.

Verdict

NMSE is the right recommendation for No Man’s Sky players who want extensive save control, broad PC-and-console format support, and dependable backup and restore without paying. Its main reason to look elsewhere is platform experience: Linux and macOS rely on Wine, and anyone editing games beyond No Man’s Sky will need a different tool.