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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.
    How it worksMalware we foundAPIAboutPrivacyTermsContact

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

    Thulium

    Mod

    A performance mod that helps your game run more smoothly.

    C71/ 100
    • OverviewC
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityMinecraft 1.20.1
    • ModpacksIn 55
    • ReleasesLatest 12 Oct

    Download

    thuliumfabric-1.0.0.jar

    Released 2 Mar 2026 · 20.7 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade C

    How grades work

    Strengths

    • Security checks passed

    Points lost

    • No source code link−7 points
    • Many modpacks removed it−6 points
    • Releases in only 4 of the last 24 months−3 points
    • First release only 8 months ago−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.12 days ago (12 Oct 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.1.20.1 on Forge and Fabric. 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.12 of the 42 modpacks with two or more versions removed it in a later one (29%) See the 12 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 6 releases in 2 years needed a quick fix (17%) 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

      7 points lost0 / 7
      Source codeWhether the project page links to its source code, so anyone can read what it does.No link on the project page 0 / 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.138,007 3 / 4

    • Track record

      3 points lost5 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.8 months, 6 releases 5 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in both latest files for recent Minecraft versions. See Security
    Total71 / 100

    48.4 of the 68 points that apply = 71 out of 100. The points above are rounded to whole numbers.

    About

    Thulium is a performance mod designed to improve Minecraft’s frame rate and reduce micro-stutters without changing entities, blocks, chunks, lighting, or world generation. It reuses temporary objects and monitors memory to reduce garbage-collection work, and optimizes sound processing by limiting simultaneous sounds, filtering nearby duplicates, and culling sounds beyond their effective hearing range. Thulium also skips Forge events with no listeners and disables profiler overhead while the F3 debug screen is closed, restoring the profiler when F3 is opened. For rendering, it disables selected OpenGL features, favors speed for internal GPU calculations, and adjusts its optimization aggressiveness in response to real-time FPS.

    Written from CurseForge . How we write it

    In-game changes

    Does not change the game's code directly.

    Adds no new blocks, items or other content.

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

    Often used with it

    See all 30
    AllTheLeaks (Memory Leak Fix)ABadOptimizationsAPacket FixerASodium Dynamic LightsCAmendmentsA

    Details

    Creator
    Zerth
    License
    Not known
    Downloads
    138K
    Created
    15 Feb 2026
    Official page
    CurseForge

    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 Forge 1.20.1.

    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. Both 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
    • 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 · Both 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 both files, for recent Minecraft versions. See each file in Releases

    AI

    No sign that AI was used to make it

    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 · 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.
    • 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
      4 of 12 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
    • 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
      8 code files read

    Compatibility

    See all 6 files
    Fabric
    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.Nothing
    OptionalProjects it can work with but does not need. The author lists them.Nothing
    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.It has no file for Minecraft versions newer than 1.20.1. Many recently updated mods still support 1.20.1.

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    30150
    Oct 2024: 0 modpacksNov 2024: 0 modpacksDec 2024: 0 modpacksJan 2025: 0 modpacksFeb 2025: 0 modpacksMar 2025: 0 modpacksApr 2025: 0 modpacksMay 2025: 0 modpacksJun 2025: 0 modpacksJul 2025: 0 modpacksAug 2025: 0 modpacksSep 2025: 0 modpacksOct 2025: 0 modpacksNov 2025: 0 modpacksDec 2025: 0 modpacksJan 2026: 0 modpacksFeb 2026: 2 modpacksMar 2026: 10 modpacksApr 2026: 16 modpacksMay 2026: 22 modpacksJun 2026: 8 modpacksJul 2026: 11 modpacksAug 2026: 12 modpacksSep 2026: 11 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 20240
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    Jan 20250
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    Feb 20262
    Mar 202610
    Apr 202616
    May 202622
    Jun 20268
    Jul 202611
    Aug 202612
    Sep 202611

    More modpacks put it in their new versions than a year ago: 13 a month now, 0 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..

    55 modpacks include Thulium in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    Age of Fate564K downloadslast version with it 2 Jun 2026SUPERIOR - RPG513K downloadslast version with it 24 May 2026Monumental Experience471K downloadslast version with it 6 Jun 2026Jurassic World Reborn II438K downloadslast version with it 30 May 2026Monumental Experience - In the Sky44K downloadslast version with it 8 Jul 2026Monumental Experience - Creatures Across the World25K downloadslast version with it 8 Jul 2026Farming Overloaded21K downloadslast version with it 9 Jul 2026VhsCraft - The Minecraft Project19K downloadslast version with it 3 Oct 2026Link's Cable13K downloadslast version with it 30 Apr 2026Monumental Experience VI - Rise of the Dinosaurs7K downloadslast version with it 7 May 2026
    1 to 10 of 30123

    Often in the same modpacks

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

    ProjectTypeShareGrade
    AllTheLeaks (Memory Leak Fix)AModin 71% of the modpacks with ThuliumBadOptimizationsAModin 67% of the modpacks with ThuliumPacket FixerAModin 65% of the modpacks with ThuliumSodium Dynamic LightsCModin 62% of the modpacks with ThuliumAmendmentsAModin 62% of the modpacks with ThuliumFastSuiteAModin 60% of the modpacks with Thuliumfix GPU memory leakAModin 60% of the modpacks with ThuliumAttributeFixAModin 60% of the modpacks with ThuliumCrash AssistantAModin 55% of the modpacks with ThuliumStructure EssentialsAModin 55% of the modpacks with Thulium
    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
    1.20.1·Fabric1.0.01.0.0 · thuliumfabric-1.0.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge1.0.61.0.6 · thulium-1.0.6.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    6 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.20.1The latest file for its Minecraft version and loader·Forge1.0.61.0.6 · thulium-1.0.6.jar·12 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 27.9 KB
    1.20.1·Forge1.0.51.0.5 · thulium-1.0.5.jar·10 Jul 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 23.1 KB
    1.20.1The latest file for its Minecraft version and loader·Fabric1.0.01.0.0 · thuliumfabric-1.0.0.jar·2 Mar 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 20.7 KB
    1.20.1·Forge1.0.41.0.4 · thulium-1.0.4.jar·16 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 24.6 KB
    1.20.1·Forge1.0.11.0.1 · thulium-1.0.1.jar·16 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 24.6 KB
    1.20.1·Forge1.0.01.0.0 · thulium-1.0.0.jar·15 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 24.6 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

    • thulium-1.0.1.jar16 Feb 2026