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    2,055,424 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 25 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 25 Oct 2026.269,392 projects gradedProjects with a letter from A to F. Counted on 25 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Worldthreader

    Mod

    Speeds up servers by safely running each dimension on a separate thread.

    C79/ 100
    • OverviewC
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 26.3
    • ModpacksIn 31
    • ReleasesLatest 27 Sep

    Download

    Worldthreader-3.2.0.jar

    Released 27 Sep 2026 · 187.9 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade C

    How grades work

    Strengths

    • Security checks passed
    • Regular releases for the newest Minecraft versions
    • Public source code and issue tracker
    • Around for years

    Points lost

    • Many modpacks removed it−10 points
    • Releases replaced within 3 days to fix a problem−4 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      Full points27 / 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 (27 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.26.3 on Fabric and Quilt (latest) 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 17 of the last 24 months 6 / 6

    • Stability

      14 points lost8 / 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 28 modpacks with two or more versions removed it in a later one (43%) See the 12 modpacks0 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.8 of its 33 releases in 2 years needed a quick fix (24%) See the 8 releases3 / 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.1 known conflict, but it does not count in the grade See the known conflict5 / 5

    • Transparency

      Full points10 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · 2No2Name/worldthreader 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · 2No2Name/worldthreader 3 / 3

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.27,967 3 / 4

    • Track record

      Full points8 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.3.7 years, 36 releases 8 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 12 latest files for recent Minecraft versions. See Security
    Total79 / 100

    56.4 of the 71 points that apply = 79 out of 100. The points above are rounded to whole numbers.

    About

    Worldthreader is a server-performance mod that processes different Minecraft dimensions in parallel, using thread-safety safeguards and falling back to serial execution when needed. It synchronizes dimensions after each tick, helping preserve timing-sensitive behavior such as advanced redstone contraptions, while the overall tick time remains governed by the slowest dimension. The mod works in multiplayer servers and singleplayer, and can support more than three dimensions, though having fewer CPU threads than dimensions may reduce performance. Some cross-dimensional behavior can differ in timing or ordering: portal-travel effects may be delayed by a tick, and commands or shared scoreboard accesses across dimensions have no guaranteed order within a tick, although command order within each dimension remains unchanged. Compatibility problems with other mods may be common, and the mod includes optional gamerules for enabling or disabling it, adjusting entity ticks after portal travel, and logging debug information or detecting unsafe world access.

    Written from Modrinth . How we write it

    In-game changes

    Changes the game's code in 9 areas: Server and world logicChanges 22 game code files in this area: the world, commands, scoreboards, saved data and game rules., Mobs and their behaviorChanges 12 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., Blocks and fluidsChanges 7 game code files in this area: how blocks, fluids and redstone work., PlayerChanges 2 game code files in this area: your character: movement, abilities, hunger and controls., Chunk loading and storageChanges 1 game code file in this area: how the game loads, tracks, saves and unloads chunks., Networking and multiplayerChanges 1 game code file in this area: connections, the server list and what is sent between your game and a server., Inventory and itemsChanges 1 game code file in this area: items, chests and other containers, crafting and enchanting., Game coreChanges 1 game code file in this area: the main loop, lighting and other code the whole game uses. and User interfaceChanges 1 game code file in this area: menus, screens, tooltips, the chat window and the in-game overlay..

    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
    FerriteCoreALithiumAScalableLuxAConcurrent Chunk Management Engine (Fabric)AVery Many Players (Fabric)A

    Details

    Creator
    2No2Name
    License
    MIT License
    Downloads
    28K
    Created
    17 Feb 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 14 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.
      14 latest files: the newest file for each Minecraft version and loader. The answer above is about the 12 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 12 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 12 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
      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
      97 code files read

    Compatibility

    See all 36 files
    Fabric
    Quilt
    1.191.201.2126.1

    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 on the server. Players join without installing it. It also works in singleplayer.
    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.Faster than most mods. On average, it gets a file 6 days after a new Minecraft version comes out. Measured on the last 6 Minecraft versions.

    Known conflicts

    These projects do not work together with Worldthreader: their authors or Worldthreader's author say so. If you install both, the game can crash or some features can stop working. Some of them do the same job as Worldthreader, so you only need one.

    ProjectTypeDownloadsDeclared by
    Serenitea PotMod62 downloadsdeclared by Serenitea Pot

    Modpacks using this project

    Find modpacks with it

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

    ModpackDownloadsLast version with it
    Re-Console712K downloadslast version with it 7 Jun 2026Void's essentially optimized pack36K downloadslast version with it 12 Oct 2025Simply Legacy32K downloadslast version with it 28 May 2026Ultimately Optimized - Vanilla but Better28K downloadslast version with it 14 May 2025Simply Optimized Forked27K downloadslast version with it 30 May 2026Oxygen12K downloadslast version with it 12 Oct 2025SBooster Official8.7K downloadslast version with it 2 Dec 2025Multi-Threading6.7K downloadslast version with it 15 Jul 2025Valkaw6.5K downloadslast version with it 16 Oct 2025RedstoneToolkit6.4K downloadslast version with it 20 Sep 2026
    1 to 10 of 30123

    Often in the same modpacks

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

    ProjectTypeShareGrade
    FerriteCoreAModin 100% of the modpacks with WorldthreaderLithiumAModin 100% of the modpacks with WorldthreaderScalableLuxAModin 90% of the modpacks with WorldthreaderConcurrent Chunk Management Engine (Fabric)AModin 90% of the modpacks with WorldthreaderVery Many Players (Fabric)AModin 77% of the modpacks with WorldthreaderKryptonAModin 74% of the modpacks with WorldthreaderModernFix-mVUSAModin 71% of the modpacks with WorldthreaderMod MenuAModin 71% of the modpacks with WorldthreaderNoisiumForked-Modin 68% of the modpacks with WorldthreaderBadOptimizationsAModin 68% of the modpacks with Worldthreader
    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
    26.3·Fabric, Quilt3.2.03.2.0 · Worldthreader-3.2.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.2·Fabric, Quilt3.1.03.1.0 · Worldthreader-3.1.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.1.2·Fabric, Quilt3.0.13.0.1 · Worldthreader-3.0.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.1·Fabric, Quilt2.8.02.8.0 · Worldthreader-2.8.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.11·Fabric, Quilt2.7.42.7.4 · Worldthreader-2.7.4.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.10·Fabric, Quilt2.6.12.6.1 · Worldthreader-2.6.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.9·Fabric, Quilt2.5.12.5.1 · Worldthreader-2.5.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.8·Fabric, Quilt2.4.32.4.3 · Worldthreader-2.4.3.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.7·Fabric, Quilt2.3.02.3.0 · Worldthreader-2.3.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.6·Fabric, Quilt2.2.02.2.0 · Worldthreader-2.2.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1 to 10 of 1412

    36 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    26.3The latest file for its Minecraft version and loader·Fabric, Quilt3.2.03.2.0 · Worldthreader-3.2.0.jar (main file)·27 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 187.9 KB
    26.2The latest file for its Minecraft version and loader·Fabric, Quilt3.1.03.1.0 · Worldthreader-3.1.0.jar (main file)·21 Jun 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 187.9 KB
    26.1.2The latest file for its Minecraft version and loader·Fabric, Quilt3.0.13.0.1 · Worldthreader-3.0.1.jar (main file)·28 May 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 187.8 KB
    26.1.2·Fabric, Quilt3.0.03.0.0 · Worldthreader-3.0.0.jar (main file)·15 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 187.8 KB
    26.1.2·Fabric, Quilt2.8.12.8.1 · Worldthreader-2.8.1.jar (main file)·15 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 185.6 KB
    26.1The latest file for its Minecraft version and loader·Fabric, Quilt2.8.02.8.0 · Worldthreader-2.8.0.jar (main file)·5 Apr 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 185.6 KB
    1.21.11The latest file for its Minecraft version and loader·Fabric, Quilt2.7.42.7.4 · Worldthreader-2.7.4.jar (main file)·26 Mar 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 183.8 KB
    1.21.10The latest file for its Minecraft version and loader·Fabric, Quilt2.6.12.6.1 · Worldthreader-2.6.1.jar (main file)·8 Mar 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 195.8 KB
    1.21.11·Fabric, Quilt2.7.32.7.3 · Worldthreader-2.7.3.jar (main file)·5 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 189.8 KB
    1.21.11·Fabric, Quilt2.7.22.7.2 · Worldthreader-2.7.2.jar (main file)·21 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 189.4 KB
    1.21.11·Fabric, Quilt2.7.12.7.1 · Worldthreader-2.7.1.jar (main file)·4 Feb 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 188.6 KB
    1.21.11·Fabric, Quilt2.7.02.7.0 · Worldthreader-2.7.0.jar (main file)·15 Dec 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 187.3 KB
    1.21.10·Fabric, Quilt2.6.02.6.0 · Worldthreader-2.6.0.jar (main file)·8 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 197.2 KB
    1.21.9The latest file for its Minecraft version and loader·Fabric, Quilt2.5.12.5.1 · Worldthreader-2.5.1.jar (main file)·4 Oct 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 197.2 KB
    1.21.9·Fabric, Quilt2.5.02.5.0 · Worldthreader-2.5.0.jar (main file)·1 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 197.2 KB
    1.21.8The latest file for its Minecraft version and loader·Fabric, Quilt2.4.32.4.3 · Worldthreader-2.4.3.jar (main file)·1 Oct 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 198.0 KB
    1.21.8·Fabric, Quilt2.4.22.4.2 · Worldthreader-2.4.2.jar (main file)·30 Sep 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 197.6 KB
    1.21.8·Fabric, Quilt2.4.12.4.1 · Worldthreader-2.4.1.jar (main file)·15 Aug 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 197.9 KB
    1.21.8·Fabric, Quilt2.4.02.4.0 · Worldthreader-2.4.0.jar (main file)·26 Jul 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 196.4 KB
    1.21.7The latest file for its Minecraft version and loader·Fabric, Quilt2.3.02.3.0 · Worldthreader-2.3.0.jar (main file)·30 Jun 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 196.3 KB
    1 to 20 of 3612

    Quick fixes

    In the last 2 years, 8 releases needed a quick fix: a new release within 3 days to fix a problem. This lowers the grade by 4 points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.8

    • Worldthreader mc26.1.2-3.0.0 for Fabric and 1 other release15 Apr 2026…mod compatibility issues, please do not report crashes and issues to other mods' issue trackers before…
    • Worldthreader mc1.21.9-2.5.1 for Fabric4 Oct 2025Worldthreader 2.5.1 for Minecraft 1.21.9 fixes an issue where player respawning fails. Please report any…
    • Worldthreader mc1.21.4-2.0.7 for Fabric19 Feb 2025Worldthreader 2.0.7 for Minecraft 1.21.4 fixes a compatibility issue with fabric-carpet's bot players…
    • Worldthreader mc1.21.4-2.0.5 for Fabric3 Feb 2025Worldthreader 2.0.5 for Minecraft 1.21.4 fixes a crash and a minor thread safety issue. Please report…
    • Worldthreader mc1.21.4-2.0.4 for Fabric1 Feb 2025Worldthreader 2.0.4 for Minecraft 1.21.4 fixes a minor thread safety issue. Please report any issues you…
    • Worldthreader mc1.21.4-2.0.3 for Fabric31 Jan 2025Worldthreader 2.0.3 for Minecraft 1.21.4 fixes a mod compatibility issue. Please report any issues you…
    • Worldthreader mc1.21.4-2.0.1 for Fabric24 Jan 2025Worldthreader 2.0.1 for Minecraft 1.21.4 fixes a few thread-safety issues and adds a new Debug gamerule…