Nautilus Studio - Packs Editor IDE
ModEdit data and resource packs with easy in-game forms.
- Security
- Passed
- Privacy
- None found
- Runs on
- Client only
- Loaders
- Fabric, NeoForge
- Minecraft versions
- Up to 26.2
Why gradeC
How grades workStrengths
Points lost
- No source code link−7 points
- First release only 4 months ago−6 points
- Under 5 million downloads−1 point
All 11 criteria
Maintenance
Full points21 / 21Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.7 days ago (20 Oct 2026) 12 / 12Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.26.2 on Fabric and NeoForge. 72% of the 721 popular Fabric mods updated in the last 6 months also have files for 26.2. Latest Minecraft: 26.3. 9 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Does not apply. The project is under 6 months old.Stability
Full points15 / 15Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.None of the 7 modpacks with two or more versions removed it 10 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Does not apply. The project is under 6 months old.Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5Transparency
7 points lost3 / 10Source codeWhether the project page links to its source code, so anyone can read what it does.No link on the project page 0 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.Discord 3 / 3Popularity
1 point lost3 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.29,361 3 / 4Track record
6 points lost2 / 8AgeHow long the project has existed. It counts less when no new file came out recently.4 months, 86 releases 2 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 10 latest files for recent Minecraft versions. See Security
44 of the 58 points that apply = 76 out of 100.
Images
About
Nautilus Studio is an in-game workbench for creating and editing data packs and resource packs, generating user-friendly forms from Minecraft’s content definitions so changes can be reloaded into the running world. It covers world generation settings such as biomes, carvers, noise settings, density functions and world presets; structures and jigsaw pools; loot tables, item modifiers and predicates; recipes, advancements and enchantments; dimensions; and content including mob variants, trims, items and sounds. The editor also exposes content registered by mods, with Polytone examples including colormaps, particle effects and custom models, and can handle custom codecs by class name. Files it cannot parse can still be edited in a live-validated raw JSON editor with syntax highlighting, while generated editors can include previews and tailored controls. It is a client-side creation tool, and the packs it produces are ordinary data and resource packs that other players can use without installing Nautilus Studio.
Written from Modrinth and CurseForge . How we write it
In-game changes
Changes the game's code in 2 areas: Game coreChanges 1 game code file in this area: the main loop, lighting and other code the whole game uses. and User interfaceChanges 1 game code file in this area: menus, screens, tooltips, the chat window and the in-game overlay..
A library packed inside it changes 9 more game code files: CodecUI.
Adds no new blocks, items or other content.
Keeps all of vanilla Minecraft's textures, models and sounds.
Details
- Creator
- MehVahdJukaar
- License
- MIT License
- Downloads
- 29K
- Created
- 11 Jul 2026
- Official pages
- Modrinth , CurseForge
Security
No harmful code found
We checked its files and read their code, without running it.
What it can do on your computer
- Uses folders outside the game
- It can read or write files outside your Minecraft folder, on the rest of your computer. Found: your user folder and the temporary files folder.
- Starts other programs
- It can start another program on your computer. It can open a web link or a file.
- Creates settings files
- The mod keeps its settings in the config folder of your game, where you can change or delete them. 1 file in your config folder.
- Connects to the internet
- It has code that can go online, for example to check for updates, load skins or send crash reports. Found in the mod's own code and in 4 libraries it includes. See Privacy
Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.
How we checked
- FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.10 latest files: the newest file for each Minecraft version and loader. All 10 are for recent versions. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
- Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.Read without running it
- Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.Nothing declared about your system outside the game.
- Uses folders outside the gameUses the system folder for application data.Uses the temporary files folder.
- Looked for, not foundWe looked for these in the file and did not find them.Updating itself, the webcam or microphone, an AI service.
Privacy
We found nothing it sends
We read its code without running it: it contacts no web address while you play.
Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.
How we checked
- Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.The code of all 10 files, for recent Minecraft versions. See each file in Releases
- Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.Nothing declared about crash reports, usage data or advertisements.
AI
The author declares AI code on Modrinth
We looked for AI tools in its texts, files and images and found none.
No sign of AI in the game
We found no AI service, AI library or AI model file in its code.
Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.
How we checked
- Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.Declares AI code. No AI features declared.
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found21 of 40 changelogs read
- Its filesCredits and texts in the files you download that name an AI tool.Nothing found
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Nothing found8 images read
- Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.No AI service, AI library or AI model file1,947 code files read
Compatibility
See all 86 filesPoint at or tap a version to see its loaders.
Modpacks using this project
Find modpacks with itModpacks that include Nautilus Studio - Packs Editor IDE in at least one of their versions, most downloaded first.
Lost World - The Broken Script661K downloadslast version with it 19 Sep 2026
Realms - Client1.5K downloadslast version with it 16 Oct 2026
Leos fantastiska modpaket633 downloadslast version with it 17 Oct 2026
Ellian Mystical Delight568 downloadslast version with it 10 Oct 2026
XG's OptiQoL376 downloadslast version with it 13 Sep 2026
Smolder's Ultimatum216 downloadslast version with it 29 Sep 2026
rbzcraft141 downloadslast version with it 16 Oct 2026Latest files
The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.