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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.
    How it worksMalware we foundAPIAboutPrivacyTermsContact

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

    Unsafe World Random Access Detector

    Mod

    Find what is causing mysterious crashes in your world.

    A92/ 100
    • OverviewA
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 26.3
    • ModpacksIn 133
    • ReleasesLatest 5 Oct

    Download

    unsafe-world-random-access-detector-1.2.0.jar

    Released 24 Mar 2026 · 19.5 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade A

    How grades work

    Strengths

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

    Points lost

    • Releases in only 3 of the last 24 months−4 points
    • Some modpacks removed it−1 point
    All 11 criteria

    • Maintenance

      4 points lost23 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.3 weeks ago (5 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.26.3 (latest) on NeoForge and Fabric, 1.21.1 on Forge 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 3 of the last 24 months 2 / 6

    • Stability

      1 point lost14 / 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.15 of the 101 modpacks with two or more versions removed it in a later one (15%) See the 15 modpacks9 / 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 · RelativityMC/unsafe-world-random-access-detector 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · RelativityMC/unsafe-world-random-access-detector 3 / 3

    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.12,001,505 4 / 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, 9 releases 8 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 5 latest files for recent Minecraft versions. See Security
    Total92 / 100

    58.6 of the 64 points that apply = 92 out of 100. The points above are rounded to whole numbers.

    Images

    • Screenshot 1 of Unsafe World Random Access Detector

    About

    Unsafe World Random Access Detector helps identify the cause of crashes related to “Accessing LegacyRandomSource from multiple threads” by detecting unsafe off-thread access to world random data. It diagnoses the issue rather than fixing it; it is unnecessary when using C2ME, though the two can be used together without crashing.

    Written from Modrinth . How we write it

    In-game changes

    Changes the game's code in 1 area: Server and world logicChanges 1 game code file in this area: the world, commands, scoreboards, saved data and game rules..

    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
    FerriteCoreALithiumAMod MenuANo Chat ReportsAReese's Sodium OptionsA

    Details

    Creator
    ishland
    License
    MIT License
    Downloads
    12M
    Created
    4 Feb 2023
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues , 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. 1 file in your config folder.
    Connects to the internet
    It has code that can go online, for example to check for updates, load skins or send crash reports. No web address is written in its code. See Privacy

    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 5 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.
      5 latest files: the newest file for each Minecraft version and loader. All 5 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
    • 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.
      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 5 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 5 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
      10 of 13 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
      10 code files read

    Compatibility

    See all 9 files
    Fabric
    NeoForge
    Forge
    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.Works in your game or on a server. With both, you get extra features.
    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.Slower than most mods. On average, it gets a file 115 days after a new Minecraft version comes out. Measured on the last 6 Minecraft versions.

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    20100
    Oct 2024: 9 modpacksNov 2024: 6 modpacksDec 2024: 13 modpacksJan 2025: 10 modpacksFeb 2025: 8 modpacksMar 2025: 9 modpacksApr 2025: 9 modpacksMay 2025: 10 modpacksJun 2025: 11 modpacksJul 2025: 6 modpacksAug 2025: 6 modpacksSep 2025: 7 modpacksOct 2025: 8 modpacksNov 2025: 9 modpacksDec 2025: 5 modpacksJan 2026: 8 modpacksFeb 2026: 7 modpacksMar 2026: 6 modpacksApr 2026: 6 modpacksMay 2026: 6 modpacksJun 2026: 4 modpacksJul 2026: 5 modpacksAug 2026: 6 modpacksSep 2026: 6 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 20249
    Nov 20246
    Dec 202413
    Jan 202510
    Feb 20258
    Mar 20259
    Apr 20259
    May 202510
    Jun 202511
    Jul 20256
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    Jan 20268
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    Sep 20266

    133 modpacks include Unsafe World Random Access Detector 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 2026Better MC [FABRIC] BMC17.9M downloadslast version with it 31 May 2023Medieval MC [FABRIC] MMC14.4M downloadslast version with it 14 Mar 2023DarkRPG - RPG with Magic, Origins, Quests, Adventure3.9M downloadslast version with it 24 Oct 2026Re-Console712K downloadslast version with it 12 May 2024TownCraft441K downloadslast version with it 19 Aug 2024Elysium Days419K downloadslast version with it 25 Jun 2026Euphoric Curiosity162K downloadslast version with it 9 Sep 2023Easycraft (Official)73K downloadslast version with it 28 Sep 2026Doom Modpack - Raze The Nether73K downloadslast version with it 15 Jun 2023
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with Unsafe World Random Access Detector. Share: how many of the modpacks with Unsafe World Random Access Detector also have that mod.

    ProjectTypeShareGrade
    FerriteCoreAModin 96% of the modpacks with Unsafe World Random Access DetectorLithiumAModin 92% of the modpacks with Unsafe World Random Access DetectorMod MenuAModin 87% of the modpacks with Unsafe World Random Access DetectorNo Chat ReportsAModin 85% of the modpacks with Unsafe World Random Access DetectorReese's Sodium OptionsAModin 84% of the modpacks with Unsafe World Random Access DetectorSodium ExtraAModin 83% of the modpacks with Unsafe World Random Access DetectorChat HeadsAModin 77% of the modpacks with Unsafe World Random Access DetectorDebugifyAModin 76% of the modpacks with Unsafe World Random Access DetectorAttributeFixAModin 76% of the modpacks with Unsafe World Random Access DetectorsparkAModin 74% of the modpacks with Unsafe World Random Access Detector
    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
    26.1 to 26.3·Fabric1.2.01.2.0 · unsafe-world-random-access-detector-1.2.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21 to 26.3·NeoForge1.1.41.1.4 · unsafe-world-random-access-detector-1.1.4+neoforge.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.19 to 1.21.11·Fabric1.1.41.1.4 · unsafe-world-random-access-detector-1.1.4.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.6 to 1.21.1·Forge1.1.11.1.1 · unsafe-world-random-access-detector-1.1.1+forge.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.19 to 1.20.4·Forge1.1.01.1.0 · unsafe-world-random-access-detector-1.1.0+forge.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    9 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21 to 26.31.21 to 26.3The latest file for its Minecraft version and loader·NeoForge1.1.41.1.4 · unsafe-world-random-access-detector-1.1.4+neoforge.jar (main file)·5 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthNot on CurseForgeDownload · Stable · 20.8 KB
    1.19 to 1.21.111.19 to 1.21.11The latest file for its Minecraft version and loader·Fabric1.1.41.1.4 · unsafe-world-random-access-detector-1.1.4.jar (main file)·5 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 20.2 KB
    26.1 to 26.326.1 to 26.3The latest file for its Minecraft version and loader·Fabric1.2.01.2.0 · unsafe-world-random-access-detector-1.2.0.jar (main file)·24 Mar 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 19.5 KB
    1.21 to 1.21.51.21 to 1.21.5·NeoForge1.1.31.1.3 · unsafe-world-random-access-detector-1.1.3+neoforge.jar (main file)·26 May 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthNot on CurseForgeDownload · Stable · 21.5 KB
    1.21 to 1.21.11.21 to 1.21.1·NeoForge1.1.11.1.1 · unsafe-world-random-access-detector-1.1.1+neoforge.jar (main file)·29 Sep 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 21.2 KB
    1.20.6 to 1.21.11.20.6 to 1.21.1The latest file for its Minecraft version and loader·Forge1.1.11.1.1 · unsafe-world-random-access-detector-1.1.1+forge.jar (main file)·29 Sep 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthNot on CurseForgeDownload · Stable · 21.2 KB
    1.19 to 1.20.41.19 to 1.20.4The latest file for its Minecraft version and loader·Forge1.1.01.1.0 · unsafe-world-random-access-detector-1.1.0+forge.jar (main file)·22 Apr 2023PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthNot on CurseForgeDownload · Stable · 21.9 KB
    1.19 to 1.21.111.19 to 1.21.11·Fabric1.1.01.1.0 · unsafe-world-random-access-detector-1.1.0.jar (main file)·25 Feb 2023PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 20.3 KB
    1.19 to 1.19.31.19 to 1.19.3·Fabric1.0.01.0.0 · unsafe-world-random-access-detector-1.0.0.jar (main file)·4 Feb 2023PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 6.9 KB