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    2,069,704 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 26 Oct 2026.646,524 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 26 Oct 2026.270,449 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.

    BlueLib

    Mod

    Tools that help mod developers build their mods more easily.

    Download

    Files come from Modrinth and CurseForge servers.

    2.1.0-fabric-1.21.1-bluelib.jar

    Released 10 Jun 2025 · 413.1 KB

    Passed: our checks found nothing harmful in this file.

    Download
    D63/ 100
    Security
    Passed
    Privacy
    None found
    Runs on
    Client and server
    Loaders
    Fabric, NeoForge
    Minecraft versions
    Up to 1.21.5
    • OverviewD
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.21.5
    • ModpacksIn 26
    • ReleasesLatest 4 Jan
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade D

    How grades work

    Strengths

    • Security checks passed
    • Public source code and issue tracker

    Points lost

    • No release in 10 months−15 points
    • Many modpacks removed it−10 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      9 points lost18 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.10 months ago (4 Jan 2026) 3 / 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 NeoForge and Fabric. 65% of the 993 popular NeoForge mods updated in the last 6 months also have files for 1.21.1. 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 13 of the last 24 months 6 / 6

    • Stability

      10 points lost12 / 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.7 of the 17 modpacks with two or more versions removed it in a later one (41%) See the 7 modpacks0 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.4 of its 35 releases in 2 years needed a quick fix (11%) 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 points10 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · MeAlam1/BlueLib 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · MeAlam1/BlueLib 3 / 3

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.84,365 3 / 4

    • Track record

      6 points lost2 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.24 months, 71 releases 2 / 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
    Total63 / 100

    44.8 of the 71 points that apply = 63 out of 100. The points above are rounded to whole numbers.

    Images

    • Logo

    About

    BlueLib is a developer library that brings reusable systems and utilities to Minecraft mod projects, including support for data packs and resource packs. Its Variant Loader lets modders define entity variants and parameters through JSON, while datapacks and resource packs can modify those variants, entity data, and textures; loading events also let developers filter or react to individual variants and to the completed set. The library includes data-driven Brewing Stand recipes defined in JSON, so modders can add custom potion recipes without writing recipe-specific code. For networking, BlueLib provides a centralized packet system for client-to-server and server-to-client communication, with sending utilities for servers, individual players, or all connected players. Its cache system supports preset values such as integer and floating-point ranges, with serialization through JSON, NBT, or dynamic formats and the option to attach caches to items, entities, or custom containers. Other developer-facing tools include utilities for common math, geometry, statistics, string and color conversion, chunk information, random generation, and delayed asynchronous tasks. BlueLib also offers Markdown formatting for in-game text, with options to disable Markdown or selected formatting elements, and lets players click chat text to copy it to their clipboard.

    Written from Modrinth . How we write it

    In-game changes

    Changes the game's code in 5 areas, as a library other mods build on: Inventory and itemsChanges 6 game code files in this area: items, chests and other containers, crafting and enchanting., Rendering and graphicsChanges 3 game code files in this area: drawing mobs, items, particles and textures on screen., World renderingChanges 1 game code file in this area: drawing the terrain, sky, clouds and weather., Mobs and their behaviorChanges 1 game code file in this area: mobs, animals, villagers, projectiles and how they move and act. and Game coreChanges 1 game code file in this area: the main loop, lighting and other code the whole game uses..

    Adds no new blocks, items or other content.

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

    Details

    Creators
    MeAlam1, DragoFRN and dan6335
    License
    MIT License
    Downloads
    84K
    Created
    30 Aug 2024
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues , Wiki , Discord

    Security

    No harmful code found

    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 NeoForge 1.21.1 to 1.21.5.

    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 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.
      9 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 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 · 5 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.
      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
      2 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
      2 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
      222 code files read

    Compatibility

    See all 71 files
    Fabric
    NeoForge
    1.2126.126.2

    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.Needed in your game and on the server, or you cannot join.
    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 APIin some filesA
    OptionalProjects it can work with but does not need. The author lists them.
    Just Enough Items (JEI)A
    IncludesProjects packed inside its files.Nothing
    LanguagesThe languages the text in the game is available in, from the language files of its latest files we checked. A language file can translate only part of the text.English only
    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 1.21.1, a version many recently updated mods still support.

    Related projects

    Projects that need BlueLib to work.

    ProjectTypeDownloadsGrade
    Bluedude DragonsEMod66K downloadsBerks Dragon AcademyDMod6.8K downloadsBlueLib CommonCMod3.7K downloads

    Modpacks using this project

    Find modpacks with it

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

    ModpackDownloadsLast version with it
    Fantasy MC Fabric1.9M downloadslast version with it 20 Jul 2026Play as Dragon: Comfort Edition57K downloadslast version with it 30 Oct 2025Integrated Boogaloo3.5K downloadslast version with it 25 Oct 2026dragon kingdom [be the dragon king}.1.1K downloadslast version with it 21 Aug 2025Yucataland1K downloadslast version with it 2 Jun 2026Isekraft719 downloadslast version with it 23 Oct 2026TMF (10 Mods a Fortnight)668 downloadslast version with it 15 Jan 2026Foxglove638 downloadslast version with it 24 Mar 2026Eldrune617 downloadslast version with it 19 Oct 2026The Maddest Son423 downloadslast version with it 18 Feb 2026
    1 to 10 of 26123

    Often in the same modpacks

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

    ProjectTypeShareGrade
    HandcraftedCModin 58% of the modpacks with BlueLibLithiumAModin 58% of the modpacks with BlueLibL_Ender's CataclysmBModin 54% of the modpacks with BlueLibAccessoriesAModin 50% of the modpacks with BlueLibSimply SwordsAModin 50% of the modpacks with BlueLibChunkyAModin 50% of the modpacks with BlueLibSophisticated StorageAModin 50% of the modpacks with BlueLibExplorer's CompassAModin 50% of the modpacks with BlueLibAmendmentsAModin 50% of the modpacks with BlueLibMowzie's MobsBModin 50% of the modpacks with BlueLib
    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
    1.21.4 to 1.21.5·Fabric2.1.02.1.0 · 2.1.0-fabric-1.21.1-bluelib.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.4 to 1.21.5·Fabric1.9.01.9.0 · fabric-bluelib-1.21.4-1.22-1.9.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.4 to 1.21.5·NeoForge2.1.02.1.0 · 2.1.0-neoforge-1.21.1-bluelib.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.4 to 1.21.5·NeoForge1.9.01.9.0 · neoforge-bluelib-1.21.4-1.22-1.9.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1 to 1.21.3·Fabric2.4.32.4.3 · 2.4.3-fabric-1.21.1-bluelib-2.4.3.jarSends: None foundRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1 to 1.21.3·NeoForge2.4.32.4.3 · 2.4.3-neoforge-1.21.1-bluelib-2.4.3.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    Older Minecraft versions
    1.21·Fabric2.3.02.3.0 · 2.3.0-fabric-1.21.1-bluelib.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21·NeoForge2.3.02.3.0 · 2.3.0-neoforge-1.21.1-bluelib.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21·NeoForge1.9.01.9.0 · neoforge-bluelib-1.21-1.21.3-1.9.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    71 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.1 to 1.21.31.21.1 to 1.21.3The latest file for its Minecraft version and loader·NeoForge2.4.32.4.3 · 2.4.3-neoforge-1.21.1-bluelib-2.4.3.jar (main file)·4 Jan 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.0 MB
    1.21.1 to 1.21.31.21.1 to 1.21.3The latest file for its Minecraft version and loader·Fabric2.4.32.4.3 · 2.4.3-fabric-1.21.1-bluelib-2.4.3.jar (main file)·4 Jan 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.0 MB
    1.21.1 to 1.21.31.21.1 to 1.21.3·NeoForge2.4.22.4.2 · 2.4.2-neoforge-1.21.1-bluelib-2.4.2.jar (main file)·30 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1023.1 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·Fabric2.4.22.4.2 · 2.4.2-fabric-1.21.1-bluelib-2.4.2.jar (main file)·30 Dec 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.0 MB
    1.21.1 to 1.21.31.21.1 to 1.21.3·NeoForge2.4.12.4.1 · 2.4.1-neoforge-1.21.1-bluelib-2.4.1.jar (main file)·30 Dec 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1022.4 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·Fabric2.4.12.4.1 · 2.4.1-fabric-1.21.1-bluelib-2.4.1.jar (main file)·30 Dec 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.0 MB
    1.21.1 to 1.21.31.21.1 to 1.21.3·Fabric2.4.02.4.0 · 2.4.0-fabric-1.21.1-bluelib-2.4.0.jar (main file)·28 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.0 MB
    1.21.1 to 1.21.31.21.1 to 1.21.3·NeoForge2.4.02.4.0 · 2.4.0-neoforge-1.21.1-bluelib-2.4.0.jar (main file)·28 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1022.3 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·Fabric2.3.82.3.8 · 2.3.8-fabric-1.21.1-bluelib-2.3.8.jar (main file)·23 Sep 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.0 MB
    1.21.1 to 1.21.31.21.1 to 1.21.3·NeoForge2.3.82.3.8 · 2.3.8-neoforge-1.21.1-bluelib-2.3.8.jar (main file)·23 Sep 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1022.9 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·Fabric2.3.72.3.7 · 2.3.7-fabric-1.21.1-bluelib-2.3.7.jar (main file)·11 Sep 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1.0 MB
    1.21.1 to 1.21.31.21.1 to 1.21.3·NeoForge2.3.72.3.7 · 2.3.7-neoforge-1.21.1-bluelib-2.3.7.jar (main file)·11 Sep 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1009.2 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·Fabric2.3.62.3.6 · 2.3.6-fabric-1.21.1-bluelib-2.3.6.jar (main file)·29 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1005.9 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·NeoForge2.3.62.3.6 · 2.3.6-neoforge-1.21.1-bluelib-2.3.6.jar (main file)·29 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 964.6 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·Fabric2.3.52.3.5 · 2.3.5-fabric-1.21.1-bluelib-2.3.5.jar (main file)·28 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 1003.4 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·NeoForge2.3.52.3.5 · 2.3.5-neoforge-1.21.1-bluelib-2.3.5.jar (main file)·28 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 962.2 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·Fabric2.3.42.3.4 · 2.3.4-fabric-1.21.1-bluelib-2.3.4.jar (main file)·27 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 995.6 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·NeoForge2.3.42.3.4 · 2.3.4-neoforge-1.21.1-bluelib-2.3.4.jar (main file)·27 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 954.5 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·Fabric2.3.3.62.3.3.6 · 2.3.3.6-fabric-1.21.1-bluelib-2.3.3.6.jar (main file)Beta·26 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 991.7 KB
    1.21.1 to 1.21.31.21.1 to 1.21.3·NeoForge2.3.3.62.3.3.6 · 2.3.3.6-neoforge-1.21.1-bluelib-2.3.3.6.jar (main file)Beta·26 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 950.8 KB
    1 to 20 of 711234

    Quick fixes

    In the last 2 years, 4 releases 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
    • 2.4.2-fabric-1.21.1-bluelib30 Dec 20252.4.2 Bug Fixes Fixed a critical issue that was preventing Servers to…
    • 2.3.2-neoforge-1.21.1-bluelib14 Aug 20252.3.2 Hotfix Warning: This is a major update with extensive…
    • fabric-bluelib-1.21-1.3.0.jar22 Nov 2024…Added Added Logging to the Markdown Bug Fixes Fixed the Custom Parameters Deleted Removed the…
    • neoforge-bluelib-1.21-1.2.0.jar21 Nov 2024…assumed that it was applying Italic Styling. Fixed the Console logging that it can't find the Variants while…