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    2,068,164 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 26 Oct 2026.643,753 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 26 Oct 2026.270,486 projects gradedProjects with a letter from A to F. Counted on 26 Oct 2026.

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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    cat_jam

    Mod

    Makes cats jam to the rhythm of music discs.

    Download

    Files come from Modrinth and CurseForge servers.

    cat_jam-fabric-mc1.21.2-1.3.1.jar

    Released 18 Nov 2024 · 51.2 KB

    Passed: our checks found nothing harmful in this file.

    Download

    Required to run

    • Fabric APIAMinecraft 1.21.5 · Fabric (release 0.128.2)
    C77/ 100
    Security
    Passed
    Privacy
    None found
    Runs on
    Client only
    Loaders
    Fabric, Forge, NeoForge
    Minecraft versions
    Up to 1.21.5
    • OverviewC
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.21.5
    • ModpacksIn 1,208
    • ReleasesLatest Nov 2024
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade C

    How grades work

    Strengths

    • Security checks passed
    • Public source code and issue tracker
    • Widely used

    Points lost

    • No release or new Minecraft version in 19 months−8 points
    • Releases in only 2 of the last 24 months−5 points
    • Some modpacks removed it−2 points
    All 11 criteria
    • Maintenance

      10 points lost17 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.The author marked an existing file as working on Minecraft 1.21.5, which came out on 25 Mar 2025. 93 modpacks released in the last 6 months still include it, so it keeps 58% of these points. 7 / 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.1.21.5 on Fabric and NeoForge, 1.20.4 on Forge. 15% of the 721 popular Fabric mods updated in the last 6 months also have files for 1.21.4. 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 2 of the last 24 months 1 / 6
    • Stability

      2 points lost13 / 15
      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.60 of the 360 modpacks with two or more versions removed it in a later one (17%) See the 60 modpacks8 / 10
      Quick 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.None 5 / 5
    • Transparency

      Full points10 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · shmove/cat_jam 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · shmove/cat_jam 3 / 3
    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.10,963,272 4 / 4
    • Track record

      3 points lost5 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.3.5 years, 55 releases 5 / 8
    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 6 latest files for recent Minecraft versions. See Security
    Total77 / 100

    49 of the 64 points that apply = 77 out of 100.

    Images

    • jamming

    About

    cat_jam makes cats dance to the rhythm of music discs, with a set routine for each supported disc. It supports the vanilla jukebox and provides custom routines for all 14 Discs Where Discs Shouldn't Be discs, Alex’s Mobs’ Daze and Thime, Quark’s Endermosh, and Supplementaries’ Heave Ho! and secret disc. For other tracks from mods that use the vanilla jukebox, and for custom AudioPlayer discs, cats perform a simple adaptable routine.

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

    In-game changes

    Changes the game's code in 3 areas: Rendering and graphicsChanges 3 game code files in this area: drawing mobs, items, particles and textures on screen., Networking and multiplayerChanges 1 game code file in this area: connections, the server list and what is sent between your game and a server. and Mobs and their behaviorChanges 1 game code file in this area: mobs, animals, villagers, projectiles and how they move and act..

    Adds no new blocks, items or other content.

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

    Details

    Creator
    shmove
    License
    Creative Commons Attribution Non Commercial Share Alike 4.0 International
    Downloads
    11M
    Created
    8 May 2023
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues

    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 · All 6 latest files checked, last on 15 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.
      13 latest files: the newest file for each Minecraft version and loader. The answer above is about the 6 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.
    • 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 · All 6 files 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 all 6 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

    No sign that AI was used to make it

    We looked for AI tools in its texts, files, images and code history 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 · 6 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.
      No AI content or AI features declared.
    • 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
      33 of 40 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
      1 image 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
      24 code files read

    Compatibility

    See all 55 files
    Fabric
    NeoForge
    Forge
    1.181.201.2126.1

    Point at or tap a version to see its loaders.

    Runs onWhere to install it: in your game, on the server, or both. As the author says on Modrinth.Install it in your game only. Servers do not need it, so you can join any server.
    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.
    Fabric APIon FabricA
    OptionalProjects it can work with but does not need. The author lists them.
    Discs Where Discs Shouldn't Beon FabricCAudioPlayeron FabricASupplementariesAQuarkon NeoForge and ForgeAAlex's Mobson NeoForge and ForgeC
    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 1.21.5. It has no file for the 6 newer Minecraft versions. It also supports 1.21.4, a version many recently updated mods still support.

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    2001000
    Oct 2024: 94 modpacksNov 2024: 83 modpacksDec 2024: 81 modpacksJan 2025: 101 modpacksFeb 2025: 93 modpacksMar 2025: 96 modpacksApr 2025: 101 modpacksMay 2025: 94 modpacksJun 2025: 71 modpacksJul 2025: 71 modpacksAug 2025: 54 modpacksSep 2025: 62 modpacksOct 2025: 53 modpacksNov 2025: 51 modpacksDec 2025: 33 modpacksJan 2026: 40 modpacksFeb 2026: 39 modpacksMar 2026: 35 modpacksApr 2026: 27 modpacksMay 2026: 21 modpacksJun 2026: 20 modpacksJul 2026: 25 modpacksAug 2026: 27 modpacksSep 2026: 25 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 202494
    Nov 202483
    Dec 202481
    Jan 2025101
    Feb 202593
    Mar 202596
    Apr 2025101
    May 202594
    Jun 202571
    Jul 202571
    Aug 202554
    Sep 202562
    Oct 202553
    Nov 202551
    Dec 202533
    Jan 202640
    Feb 202639
    Mar 202635
    Apr 202627
    May 202621
    Jun 202620
    Jul 202625
    Aug 202627
    Sep 202625

    Fewer modpacks put it in their new versions than a year ago: 24 a month now, 76 a year agoThe average of the last 6 months, compared with the same 6 months a year before. We say it only when the change is large..

    1,208 modpacks include cat_jam in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    Prominence™ II: Hasturian Era15.4M downloadslast version with it 23 Oct 2026DarkRPG - RPG with Magic, Origins, Quests, Adventure3.9M downloadslast version with it 24 Oct 2026Pixel Perfect517K downloadslast version with it 27 Sep 2025More Animals [FORGE] - 1.21 UPDATE!456K downloadslast version with it 25 Oct 2026TownCraft441K downloadslast version with it 21 Jan 2024Elysium Days420K downloadslast version with it 7 May 2024Ancient Kingdoms 3263K downloadslast version with it 25 Feb 2025Cottage Witch: Recast144K downloadslast version with it 15 Jan 2024Utopia (femboy Edition)144K downloadslast version with it 25 Dec 2024Feather | Lightweight Vanilla+ Modpack133K downloadslast version with it 8 Jul 2026
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with cat_jam. Share: how many of the modpacks with cat_jam also have that mod.

    ProjectTypeShareGrade
    Chat HeadsAModin 61% of the modpacks with cat_jamFerriteCoreAModin 53% of the modpacks with cat_jamLithiumAModin 51% of the modpacks with cat_jamMod MenuAModin 46% of the modpacks with cat_jamHandcraftedCModin 44% of the modpacks with cat_jamAmendmentsAModin 44% of the modpacks with cat_jamBetterF3AModin 44% of the modpacks with cat_jamsparkAModin 44% of the modpacks with cat_jamReese's Sodium OptionsAModin 43% of the modpacks with cat_jamVisual WorkbenchAModin 43% of the modpacks with cat_jam
    1 to 10 of 30123

    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
    1.21.2 to 1.21.5·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.21.2-1.3.1.jarSends: None foundRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.2 to 1.21.5·NeoForge1.3.11.3.1 · cat_jam-neoforge-mc1.21.2-1.3.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21 to 1.21.1·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.21-1.3.1.jarSends: None foundRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21 to 1.21.1·NeoForge1.3.11.3.1 · cat_jam-neoforge-mc1.21-1.3.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20 to 1.20.6·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.20-1.3.1.jarSends: None foundRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20 to 1.20.4·Forge1.3.11.3.1 · cat_jam-forge-mc1.20-1.3.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    Older Minecraft versions
    1.19.4·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.19.4-1.3.1.jarSends: None foundRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    1.19.4·Forge1.3.11.3.1 · cat_jam-forge-mc1.19.4-1.3.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.19.3·Fabric1.0.11.0.1 · cat_jam-1.0.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.19.2·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.19.2-1.3.1.jarSends: None foundRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    1 to 10 of 1312

    55 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.2 to 1.21.51.21.2 to 1.21.5The latest file for its Minecraft version and loader·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.21.2-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 51.2 KB
    1.21.2 to 1.21.51.21.2 to 1.21.5The latest file for its Minecraft version and loader·NeoForge1.3.11.3.1 · cat_jam-neoforge-mc1.21.2-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 47.5 KB
    1.21 to 1.21.11.21 to 1.21.1The latest file for its Minecraft version and loader·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.21-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 49.1 KB
    1.21 to 1.21.11.21 to 1.21.1The latest file for its Minecraft version and loader·NeoForge1.3.11.3.1 · cat_jam-neoforge-mc1.21-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 45.4 KB
    1.20 to 1.20.61.20 to 1.20.6The latest file for its Minecraft version and loader·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.20-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 47.7 KB
    1.20 to 1.20.41.20 to 1.20.4The latest file for its Minecraft version and loader·Forge1.3.11.3.1 · cat_jam-forge-mc1.20-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 44.3 KB
    1.19.4The latest file for its Minecraft version and loader·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.19.4-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 47.6 KB
    1.19.4The latest file for its Minecraft version and loader·Forge1.3.11.3.1 · cat_jam-forge-mc1.19.4-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 44.2 KB
    1.19.2The latest file for its Minecraft version and loader·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.19.2-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 44.3 KB
    1.19.2The latest file for its Minecraft version and loader·Forge1.3.11.3.1 · cat_jam-forge-mc1.19.2-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 43.8 KB
    1.18.2The latest file for its Minecraft version and loader·Fabric1.3.11.3.1 · cat_jam-fabric-mc1.18.2-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 40.8 KB
    1.18.2The latest file for its Minecraft version and loader·Forge1.3.11.3.1 · cat_jam-forge-mc1.18.2-1.3.1.jar (main file)·18 Nov 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 43.8 KB
    1.21.2 to 1.21.31.21.2 to 1.21.3·Fabric1.3.01.3.0 · cat_jam-fabric-mc1.21.2-1.3.0.jar (main file)·26 Oct 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 47.0 KB
    1.21.2 to 1.21.31.21.2 to 1.21.3·NeoForge1.3.01.3.0 · cat_jam-neoforge-mc1.21.2-1.3.0.jar (main file)·26 Oct 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 43.2 KB
    1.21 to 1.21.11.21 to 1.21.1·NeoForge1.2.31.2.3 · cat_jam-neoforge-mc1.21-1.2.3.jar (main file)·14 Jun 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 36.2 KB
    1.21 to 1.21.11.21 to 1.21.1·Fabric1.2.31.2.3 · cat_jam-fabric-mc1.21-1.2.3.jar (main file)·13 Jun 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 41.3 KB
    1.20 to 1.20.61.20 to 1.20.6·Fabric1.2.21.2.2 · cat_jam-fabric-mc1.20-1.2.2.jar (main file)·12 May 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 42.3 KB
    1.20 to 1.20.41.20 to 1.20.4·Forge1.2.21.2.2 · cat_jam-forge-mc1.20-1.2.2.jar (main file)·12 May 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 37.4 KB
    1.19.4·Fabric1.2.21.2.2 · cat_jam-fabric-mc1.19.4-1.2.2.jar (main file)·12 May 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 42.1 KB
    1.19.4·Forge1.2.21.2.2 · cat_jam-forge-mc1.19.4-1.2.2.jar (main file)·12 May 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 37.2 KB
    1 to 20 of 55123