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    2,046,932 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 24 Oct 2026.636,163 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 24 Oct 2026.269,480 projects gradedProjects with a letter from A to F. Counted on 24 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    RarityJS

    Mod

    Create new rarity for modpack through KubeJS.

    B86/ 100
    • OverviewB
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.20.4
    • ModpacksIn 16
    • ReleasesLatest 30 Sep

    Download

    raritymod-1.0.4.jar

    Released 28 Mar 2025 · 33.1 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade B

    How grades work

    Strengths

    • Security checks passed
    • Public source code
    • Around for years

    Points lost

    • Many modpacks removed it−6 points
    • Releases in only 4 of the last 24 months−3 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      3 points lost24 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.4 weeks ago (30 Sep 2026) 12 / 12
      Supports 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.1.20.4 on NeoForge, 1.20.1 on Forge. 15% or more of the popular mods updated in the last 6 months also have files for 1.20.1. Latest Minecraft: 26.3. 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 4 of the last 24 months 3 / 6

    • Stability

      6 points lost16 / 22
      Removed 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.4 of the 15 modpacks with two or more versions removed it in a later one (27%) See the 4 modpacks4 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.1 of its 13 releases in 2 years needed a quick fix (8%) 7 / 7
      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 / 5

    • Transparency

      Full points7 / 7
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · TokyoSU/CustomRarityMod 7 / 7
      Place 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

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.73,357 3 / 4

    • Track record

      Full points8 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.19 months, 13 releases 8 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in the latest file for recent Minecraft versions. See Security
    Total86 / 100

    58.3 of the 68 points that apply = 86 out of 100. The points above are rounded to whole numbers.

    Images

    • rarity_editor_panel.png
    • rarity_editor_selection.png

    About

    RarityJS gives modpack creators control over item rarities through KubeJS, letting them define custom rarity levels and assign them to individual items, item tags, NBT variants, or all items from a mod. It provides built-in rarity levels including Common, Uncommon, Rare, Unique, Legendary, Epic, Mythic, and God, and supports a default rarity for otherwise-unmatched items as well as replacements for Minecraft's built-in rarities. A Creative-mode editor lets users assign rarities in-game, with assignments exportable as KubeJS startup scripts; its JEI-aware interface can help when browsing items. With Fragmentum and Obscure Tooltips installed, the bundled Rarity Tooltips resource pack adds enhanced tooltip visuals, including frames, panels, labels, icons, and effects for RarityJS rarities.

    Written from CurseForge and the GitHub README . How we write it

    In-game changes

    Changes the game's code in 1 area, as a library other mods build on: Inventory and itemsChanges 1 game code file in this area: items, chests and other containers, crafting and enchanting..

    Adds no new blocks, items or other content.

    Keeps all of vanilla Minecraft's textures, models and sounds.

    Details

    Creator
    TokyoSU
    License
    Not known
    Downloads
    73K
    Created
    15 Jun 2024
    Official page
    CurseForge
    Links
    Source code

    Security

    No harmful code found

    We checked its files and read their code, without running it.

    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 · Both latest files checked, last on 16 Oct 2026
    • 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.
      2 latest files: the newest file for each Minecraft version and loader. The answer above is about the one for a recent version. 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

    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 · Its one file read
    • 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 its one file, for recent Minecraft versions. See each file in Releases

    AI

    No sign so far that AI was used to make it

    We looked for AI tools in its texts, files and images and found none.

    We have not read its code history 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 · 4 places read
    • 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.
      Not read yet
    • 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
      26 changelogs read
    • 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 found
      11 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 file
      20 code files read

    Compatibility

    See all 13 files
    NeoForge
    Forge
    1.201.2126.126.3

    Point at or tap a version to see its loaders.

    RequiresProjects you must also install for it to work. From the author's lists for its files for recent Minecraft versions, or from its project page.
    ApocalypseLibB
    OptionalProjects it can work with but does not need. The author lists them.
    Obscure TooltipsB
    IncludesProjects packed inside its files.Nothing
    Speed of updatesHow fast it gets a file for new Minecraft versions, on average, compared with similar projects. Not part of the grade.Its newest file is for 1.20.4. It has no file for the 6 newer Minecraft versions. It also supports 1.20.1, a version many recently updated mods still support.

    Modpacks using this project

    Find modpacks with it

    Modpacks that include RarityJS in at least one of their versions, most downloaded first.

    ModpackDownloadsLast version with it
    Calamycraft106K downloadslast version with it 29 Jun 2026Magic Valley36K downloadslast version with it 8 Feb 2026Cap's Create RPG5.4K downloadslast version with it 21 Sep 2026FUSSION-BORN2.3K downloadslast version with it 5 Oct 2025Devotion, Medieval/Fantasy pack1.8K downloadslast version with it 20 Oct 2024Mindart's Multiverse1.4K downloadslast version with it 1 Oct 2024Call of Combat1.3K downloadslast version with it 26 Jul 2026The fall of the seven sins991 downloadslast version with it 5 Apr 2025The 7 labyrinths of Aldorea (dev version)456 downloadslast version with it 27 Jan 2026WTFCRAFT (TheTrueTerrarian Edition)326 downloadslast version with it 19 Feb 2026
    1 to 10 of 1612

    Latest 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.

    MinecraftLoaderVersionSecuritySendsRequires
    1.20.1·Forge1.1.71.1.7 · raritymod-1.1.7.jarSends: None foundRequires:ApocalypseLibPassedOur checks found nothing harmful in this file. Its code was read too.
    Older Minecraft versions
    1.20.4·NeoForge1.0.41.0.4 · raritymod-1.0.4.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    13 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.20.1The latest file for its Minecraft version and loader·Forge1.1.71.1.7 · raritymod-1.1.7.jar·30 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 400.2 KB
    1.20.1·Forge1.1.51.1.5 · raritymod-1.1.5.jar·19 Feb 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 397.5 KB
    1.20.1·Forge1.1.41.1.4 · raritymod-1.1.4.jar·16 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 420.1 KB
    1.20.1·Forge1.1.31.1.3 · raritymod-1.1.3.jar·7 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 208.1 KB
    1.20.1·Forge1.1.21.1.2 · raritymod-1.1.2.jar·6 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 208.8 KB
    1.20.1·Forge1.1.11.1.1 · raritymod-1.1.1.jar·5 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 66.8 KB
    1.20.1·Forge1.1.01.1.0 · raritymod-1.1.0.jar·1 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 89.7 KB
    1.20.1·Forge1.0.71.0.7 · raritymod-1.0.7.jar·1 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 63.6 KB
    1.20.1·Forge1.0.61.0.6 · raritymod-1.0.6.jar·31 Jan 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 62.9 KB
    1.20.1·Forge1.0.51.0.5 · raritymod-1.0.5.jar·28 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 51.1 KB
    1.20.4The latest file for its Minecraft version and loader·NeoForge1.0.41.0.4 · raritymod-1.0.4.jar·28 Mar 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 33.1 KB
    1.20.1·Forge1.0.41.0.4 · raritymod-1.0.4.jar·27 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 52.1 KB
    1.20.1·Forge1.0.31.0.3 · raritymod-1.0.3.jar·26 Mar 2025PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 51.0 KB

    Quick fixes

    In the last 2 years, 1 release needed a quick fix: a new release within 3 days to fix a problem. This counts in the grade, but it is too few to lose points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.1

    • RarityJS 1.1.01 Feb 2026Fixed rarity resourcepack not working (Need to be enabled…