KubeJS (Old)
ModWrite scripts to change recipes and customize your game world.
Why gradeE
How grades workStrengths
Points lost
- No release in 4.5 years−26 points
- No file for a Minecraft version most modpacks use−9 points
All 11 criteria
Maintenance
27 points lost0 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.4.5 years ago (23 Apr 2022) 0 / 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.1.18.2 on Fabric. About 4.5 years behind popular modding versions. Latest Minecraft: 26.3. Abandoned: no release for 4.5 years; no file for a popular modding version; no recent human commit.0 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.No release in the last 24 months 0 / 6Stability
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.15 of the 143 modpacks with two or more versions removed it in a later one (10%) 10 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Not measured yet.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.1 known conflict, and it counts in the grade See the known conflict5 / 5Transparency
Full points7 / 7Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · kube-mods/kubejs 7 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.Does not apply. CurseForge links are not in our data.Popularity
Full points4 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.3,245,656 4 / 4Track record
8 points lost0 / 8AgeHow long the project has existed. It counts less when no new file came out recently.6.3 years, 229 releases 0 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 7 latest files. See Security
25.6 of the 61 points that apply = 42 out of 100. The points above are rounded to whole numbers.
About
KubeJS (Old) is a Fabric port of KubeJS, a scripting mod for customizing Minecraft modpacks and servers with JavaScript. Scripts can manage server behavior through events, alter recipes and tags, customize world generation, and add or modify blocks, items, fluids, mob effects, and tool or armor tiers. Event handlers can respond to actions such as breaking, placing, or clicking blocks and picking up, crafting, dropping, or using items, allowing scripts to change or cancel those interactions. For example, scripts can replace a broken stone block with cobblestone, prevent chest interactions, or make a bucket milk a goat. KubeJS also supports custom handlers and integrations for quest mods such as FTB Quests, while datapack-based recipes from other mods are supported by default. Its startup, server, and client script folders support different kinds of customization, with reload options for many scripts and data changes; registry changes and world-generation changes can require a game or world restart.
Written from the GitHub README . How we write it
In-game changes
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.16 to 1.18.2.
Changes the game's code in 11 areas: Inventory and itemsChanges 6 game code files in this area: items, chests and other containers, crafting and enchanting., Game data and resourcesChanges 6 game code files in this area: recipes, tags, advancements, language files and other game data., User interfaceChanges 3 game code files in this area: menus, screens, tooltips, the chat window and the in-game overlay., Mobs and their behaviorChanges 3 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., Game coreChanges 3 game code files in this area: the main loop, lighting and other code the whole game uses., Game optionsChanges 2 game code files in this area: settings, key bindings and the option screens., PlayerChanges 2 game code files in this area: your character: movement, abilities, hunger and controls., Server and world logicChanges 2 game code files in this area: the world, commands, scoreboards, saved data and game rules., Rendering and graphicsChanges 1 game code file in this area: drawing mobs, items, particles and textures on screen., Blocks and fluidsChanges 1 game code file in this area: how blocks, fluids and redstone work. and Networking and multiplayerChanges 1 game code file in this area: connections, the server list and what is sent between your game and a server..
Keeps all of vanilla Minecraft's textures, models and sounds.
Often used with it
See all 30Details
- Creators
- shedaniel, MaxNeedsSnacks and Lat
- License
- Not known
- Downloads
- 3.2M
- Created
- 21 Jul 2020
- Official page
- CurseForge
- Links
- Source code
Security
No harmful code found
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.16 to 1.18.2.
We checked its files and read their code, without running it.
What it can do on your computer
- Creates settings files
- The mod keeps its settings in the config folder of your game, where you can change or delete them. Only in its files for Fabric 1.16.2 to 1.18.2.
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.7 latest files: the newest file for each Minecraft version and loader. None is for a recent Minecraft version, so the answer above is about all of them. 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
- Looked for, not foundWe looked for these in the file and did not find them.The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.
Privacy
We found nothing it sends
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.16 to 1.18.2.
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 7 files, for Minecraft 1.16 to 1.18.2. See each file in Releases
AI
No sign so far that AI was used to make it
We looked for AI tools in its description, files, images and code history and found none.
We have not read its changelogs yet.
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.Not on Modrinth.
- Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.Nothing found
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found in the descriptionChangelogs not read yet
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.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 found12 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 file507 code files read
Compatibility
See all 229 filesPoint at or tap a version to see its loaders.
Known conflicts
These projects do not work together with KubeJS (Old): their authors or the author of KubeJS (Old) say so. If you install both, the game can crash or some features can stop working. Some of them do the same job as KubeJS (Old), so you only need one.
Related projects
Projects that say they work with KubeJS (Old), or that KubeJS (Old) says it works with.
Modpacks using this project
Find modpacks with it177 modpacks include KubeJS (Old) in at least one of their versions. Here are the 30 most downloaded.
Better MC [FABRIC] BMC17.9M downloadslast version with it 10 Jan 2022
Valhelsia: Enhanced Vanilla1.8M downloadslast version with it 26 Apr 2022
All of Fabric 3 - AOF31.1M downloadslast version with it 1 Feb 2022
All of Fabric 5 - AOF5661K downloadslast version with it 8 May 2022
Another Quality Modpack 2 - AQM2627K downloadslast version with it 17 May 2022
Infinity - Fabric545K downloadslast version with it 17 Jun 2022
All of Fabric 4 - AOF4374K downloadslast version with it 13 Dec 2021
Craft to Exile [Harmony]329K downloadslast version with it 10 Dec 2021
Dreamcraft [FABRIC]323K downloadslast version with it 1 Apr 2022
Benchmark II - 1.18191K downloadslast version with it 31 Mar 2022Often in the same modpacks
Mods that modpacks often add together with KubeJS (Old). Share: how many of the modpacks with KubeJS (Old) also have that mod.
Mod MenuAModin 93% of the modpacks with KubeJS (Old)
LithiumAModin 79% of the modpacks with KubeJS (Old)
BetterEndBModin 70% of the modpacks with KubeJS (Old)
Mo' Structures (NeoForge/Fabric)CModin 68% of the modpacks with KubeJS (Old)
CroptopiaAModin 67% of the modpacks with KubeJS (Old)
AdornAModin 67% of the modpacks with KubeJS (Old)
Wraith WaystonesAModin 66% of the modpacks with KubeJS (Old)
FerriteCoreAModin 66% of the modpacks with KubeJS (Old)
CleanCutBModin 66% of the modpacks with KubeJS (Old)
Repurposed Structures - FabricAModin 65% of the modpacks with KubeJS (Old)Latest files
The newest file for each Minecraft version and loader. None is for a recent Minecraft version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.