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NMSE (No Man's Save Editor)
What it is
NMSE (No Man’s Save Editor) is a free, open-source desktop application for editing No Man’s Sky saves. It can change inventories, unlock items, adjust discoveries, and create backups. Its visual inventory grid supports drag-and-drop item management, auto-stacking, and sorting; a backup picker can restore a saved copy. NMSE supports all 16 game languages and saves from Steam, GOG, Xbox Game Pass, PlayStation 4, and Nintendo Switch. It also offers cross-editor import and export of practically everything. The maker says the application will always be free and ad-free. Windows users receive a ZIP release; Linux users can use an AppImage with Wine included, and macOS users can use a DMG with a Wine launcher. Those Linux and macOS versions run through Wine compatibility layers. The fan-made project is licensed under GPL 3.0 and is not affiliated with Hello Games. The maker points users to Discord for community help and GitHub issues for bug reports.
For and against
For
- Free and ad-free, according to its maker
- Supports saves from five listed platforms
- Inventory grid includes drag-and-drop and sorting
- Backup picker supports restore
- Supports all 16 game languages
Against
- Linux and macOS versions run through Wine
- Windows release is distributed as a ZIP
- Fan-made and not affiliated with Hello Games
The verdict
NMSE combines save editing, inventory tools, and backup restoration for No Man’s Sky. Linux and macOS users should note that their versions use Wine compatibility layers.
Who it suits
NMSE suits No Man’s Sky players who want to edit supported save files or manage inventory items on desktop. It may also suit users who need save editing across the listed game platforms.
Plans and prices
Free
ad-free · desktop save editing
Read 15 Oct 2026 · nmse.vectorcmdr.xyz
NMSE
Free and ad-free · desktop save editor
Read 4 Oct 2026 · nmse.vectorcmdr.xyz
On the record
- Account-reward limitation
- Account-reward edits may require launching the game offline and editing platform settings because the game can recreate reward files at runtime.github.com · read 15 Oct 2026
- API and SDK
- The published documentation describes an internal .NET application architecture but does not document a public web API or SDK.github.com · read 15 Oct 2026
- Backups
- NMSE automatically creates the ten most recent timestamped ZIP backups for each save folder.github.com · read 15 Oct 2026
- Bases and settlements
- The editor handles base inventories, storage, settlement statistics, production, perks, corvette caches, fishing inventories and space-station data.github.com · read 15 Oct 2026
- Build requirements
- Building from source uses dotnet restore/build/test and requires the .NET 10.0 SDK with Windows or cross-compilation targeting enabled.github.com · read 15 Oct 2026
- Community support
- The project directs users to Discord, GitHub issues and Reddit for help and bug reporting.nmse.vectorcmdr.xyz · read 15 Oct 2026
- Companions
- Companion features include creature editing, custom creature building, pet-battle editing and pet-battle seed searches.github.com · read 15 Oct 2026
- Company status
- The available maker pages identify an individual maintainer and fan-made project rather than a registered company, headquarters, founding year, employee count or funding.nmse.vectorcmdr.xyz · read 15 Oct 2026
- Cost
- The maker says the app will always be free and ad-free.nmse.vectorcmdr.xyz · read 4 Oct 2026
- Developer documentation depth
- Developer documentation covers architecture, core logic, data, I/O, models and UI internals.github.com · read 15 Oct 2026
- Documentation
- The project publishes a panel-by-panel user guide, developer documentation, contribution guidance, code-of-conduct material and support links.github.com · read 15 Oct 2026
- Editing
- It can modify inventories, unlock items, tweak discoveries, and make backups.nmse.vectorcmdr.xyz · read 4 Oct 2026
- Installation
- Windows installation consists of downloading a release archive, extracting it and running NMSE.exe; Steam, GOG and Xbox Game Pass save locations can be auto-detected.github.com · read 15 Oct 2026
- Integrations
- The documented integrations are save formats and game platforms rather than third-party SaaS services; no external service integrations are listed.github.com · read 15 Oct 2026
- Inventory tools
- NMSE provides visual grids, drag-and-drop management, auto-stacking, sorting, imports and exports, backups, procedural-stat searches and a raw JSON viewer.github.com · read 15 Oct 2026
- Languages
- The application is localized in 16 languages, including English, French, German, Spanish, Portuguese, Chinese, Japanese and Korean.github.com · read 15 Oct 2026
- Latest release
- The releases page lists NMSE v1.4.29 as the latest release, dated 1 October 2026, with external-change detection added and several bug fixes.github.com · read 15 Oct 2026
- Licence
- The current repository README identifies the project licence as GNU Affero General Public License 3.0 and excludes reverse-engineered game-derived portions from wholesale reuse.github.com · read 15 Oct 2026
