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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.

    Duplicationless

    Mod

    A library that helps other mods save settings and remember world data.

    A97/ 100
    • OverviewA
    • SecurityPassed
    • PrivacyGoes online
    • AIAI images
    • CompatibilityUp to 1.21.11
    • ModpacksIn 764
    • ReleasesLatest 14 Aug

    Download

    duplicationless-1.21.11-1.2.1.jar

    Released 14 Aug 2026 · 222.5 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade A

    How grades work

    Strengths

    • Stable releases
    • Public source code
    • Widely used

    Points lost

    • Releases in only 6 of the last 24 months−1 point
    • First release only 11 months ago−1 point
    All 11 criteria

    • Maintenance

      1 point lost26 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.2 months ago (14 Aug 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.1.21.11 on NeoForge, 1.20.1 on Forge. 15% or more of the popular mods updated in the last 6 months also have files for 1.21.11. 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 6 of the last 24 months 5 / 6

    • Stability

      Full points22 / 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.32 of the 363 modpacks with two or more versions removed it in a later one (9%) 10 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.2 of its 24 releases in 2 years needed a quick fix (8%) 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 points7 / 7
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · MCTeamPotato/Duplicationless 7 / 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

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.3,336,702 4 / 4

    • Track record

      1 point lost7 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.11 months, 117 releases 7 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 3 latest files for recent Minecraft versions. See Security
    Total97 / 100

    65.8 of the 68 points that apply = 97 out of 100. The points above are rounded to whole numbers.

    About

    Duplicationless is a library for Minecraft mod developers that brings reusable APIs for JSON configuration, block data storage, and entity tracking across chunks and dimensions, helping avoid reimplementing that code in each mod.

    Written from CurseForge . How we write it

    In-game changes

    Changes the game's code in 5 areas, as a library other mods build on: Mobs and their behaviorChanges 4 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., Server and world logicChanges 2 game code files in this area: the world, commands, scoreboards, saved data and game rules., Inventory and itemsChanges 1 game code file in this area: items, chests and other containers, crafting and enchanting., Blocks and fluidsChanges 1 game code file in this area: how blocks, fluids and redstone work. 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.

    Often used with it

    See all 30
    DoesPotatoTick?BAllTheLeaks (Memory Leak Fix)ABadOptimizationsAFastSuiteAAttributeFixA

    Details

    Creator
    _nArUTo_
    License
    Not known
    Downloads
    3.3M
    Created
    7 Nov 2025
    Official page
    CurseForge
    Links
    Source code

    Security

    No harmful code found

    We checked its files and read their code, without running it.

    What it can do on your computer

    Uses folders outside the game
    It can read or write files outside your Minecraft folder, on the rest of your computer. Found: your user folder.
    Connects to the internet
    It has code that can go online, for example to check for updates, load skins or send crash reports. Only in its files for Forge 1.20.1. 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 7 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.
      7 latest files: the newest file for each Minecraft version and loader. The answer above is about the 3 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.
      Other programs, updating itself, the webcam or microphone, an AI service.

    Privacy

    We found nothing it sends about you

    We read its code without running it: it contacts 1 web address while you play.

    Like any connection, each address it contacts sees your IP address.

    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 3 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 3 files, for recent Minecraft versions. See each file in Releases
    • Address built while the game runsThe code builds this address while the game runs: it is not written in the file.
      Purpose not known.

    AI

    AI was used for its images

    ChatGPT is named in the images in its files.

    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.
      Not on Modrinth.
    • 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
      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.
      An image names ChatGPT in its image metadata logo.jpg
    • 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
      46 code files read

    Compatibility

    See all 117 files
    NeoForge
    Forge
    1.81.101.151.1926.1

    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 1.21.11. Many recently updated mods still support 1.21.11.

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    2001000
    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: 24 modpacksDec 2025: 84 modpacksJan 2026: 83 modpacksFeb 2026: 97 modpacksMar 2026: 120 modpacksApr 2026: 119 modpacksMay 2026: 109 modpacksJun 2026: 115 modpacksJul 2026: 161 modpacksAug 2026: 177 modpacksSep 2026: 165 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 20240
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    Dec 20240
    Jan 20250
    Feb 20250
    Mar 20250
    Apr 20250
    May 20250
    Jun 20250
    Jul 20250
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    Nov 202524
    Dec 202584
    Jan 202683
    Feb 202697
    Mar 2026120
    Apr 2026119
    May 2026109
    Jun 2026115
    Jul 2026161
    Aug 2026177
    Sep 2026165

    More modpacks put it in their new versions than a year ago: 141 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..

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

    ModpackDownloadsLast version with it
    Integrated MC1.9M downloadslast version with it 26 Mar 2026Linggango - [V6.5 IS OUT]1.3M downloadslast version with it 24 Oct 2026Cisco's Fantasy Medieval RPG [Dragonfyre]935K downloadslast version with it 18 Aug 2026ZombieCraft: Zombie Apocalypse745K downloadslast version with it 6 Apr 2026SUPERIOR - RPG513K downloadslast version with it 30 Jun 2026Monumental Experience471K downloadslast version with it 23 Oct 2026Cozy Zen263K downloadslast version with it 30 Aug 2026Modded Oneblock Skyblock 174K downloadslast version with it 6 Jul 2026VERITY.exe170K downloadslast version with it 2 Oct 2026Cobblemon Realms164K downloadslast version with it 23 Dec 2025
    1 to 10 of 30123

    Often in the same modpacks

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

    ProjectTypeShareGrade
    DoesPotatoTick?BModin 73% of the modpacks with DuplicationlessAllTheLeaks (Memory Leak Fix)AModin 71% of the modpacks with DuplicationlessBadOptimizationsAModin 68% of the modpacks with DuplicationlessFastSuiteAModin 68% of the modpacks with DuplicationlessAttributeFixAModin 62% of the modpacks with DuplicationlessConnectivityAModin 60% of the modpacks with Duplicationlessfix GPU memory leakAModin 58% of the modpacks with DuplicationlessServer Performance - Smooth Chunk SaveAModin 58% of the modpacks with DuplicationlessPacket FixerAModin 58% of the modpacks with DuplicationlesssparkAModin 58% of the modpacks with Duplicationless
    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
    1.21.11·NeoForge1.2.11.2.1 · duplicationless-1.21.11-1.2.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1·NeoForge1.2.11.2.1 · duplicationless-1.21.1-1.2.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge1.2.11.2.1 · duplicationless-1.20.1-1.2.1.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    Older Minecraft versions
    1.19.2·Forge1.1.41.1.4 · duplicationless-1.19.2-1.1.4.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.18.2·Forge1.1.41.1.4 · duplicationless-1.18.2-1.1.4.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.16.5·Forge1.2.11.2.1 · duplicationless-1.16.5-1.2.1.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.8·Forge1.0.141.0.14 · duplicationless-1.16.5-1.0.14.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    117 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.20.1The latest file for its Minecraft version and loader·Forge1.2.11.2.1 · duplicationless-1.20.1-1.2.1.jar·14 Aug 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 976.7 KB
    1.21.1The latest file for its Minecraft version and loader·NeoForge1.2.11.2.1 · duplicationless-1.21.1-1.2.1.jar·14 Aug 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 225.5 KB
    1.21.11The latest file for its Minecraft version and loader·NeoForge1.2.11.2.1 · duplicationless-1.21.11-1.2.1.jar·14 Aug 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 222.5 KB
    1.16.5The latest file for its Minecraft version and loader·Forge1.2.11.2.1 · duplicationless-1.16.5-1.2.1.jar·14 Aug 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 976.4 KB
    1.21.1·NeoForge1.2.01.2.0 · duplicationless-1.21.1-1.2.0.jar·21 May 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 214.1 KB
    1.21.11·NeoForge1.2.01.2.0 · duplicationless-1.21.11-1.2.0.jar·21 May 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 211.1 KB
    1.20.1·Forge1.2.01.2.0 · duplicationless-1.20.1-1.2.0.jar·21 May 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 965.2 KB
    1.16.5·Forge1.2.01.2.0 · duplicationless-1.16.5-1.2.0.jar·21 May 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 965.4 KB
    1.20.1·Forge1.1.61.1.6 · duplicationless-1.20.1-1.1.6.jar·28 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 961.9 KB
    1.16.5·Forge1.1.61.1.6 · duplicationless-1.16.5-1.1.6.jar·28 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 962.1 KB
    1.21.11·NeoForge1.1.61.1.6 · duplicationless-1.21.11-1.1.6.jar·28 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 207.8 KB
    1.21.1·NeoForge1.1.61.1.6 · duplicationless-1.21.1-1.1.6.jar·28 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 210.8 KB
    1.20.1·Forge1.1.51.1.5 · duplicationless-1.20.1-1.1.5.jar·19 Jan 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 805.6 KB
    1.16.5·Forge1.1.51.1.5 · duplicationless-1.16.5-1.1.5.jar·19 Jan 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 806.1 KB
    1.21.1·NeoForge1.1.51.1.5 · duplicationless-1.21.1-1.1.5.jar·19 Jan 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 54.4 KB
    1.21.11·NeoForge1.1.51.1.5 · duplicationless-1.21.11-1.1.5.jar·19 Jan 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 55.5 KB
    1.19.2The latest file for its Minecraft version and loader·Forge1.1.41.1.4 · duplicationless-1.19.2-1.1.4.jar·11 Jan 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 803.1 KB
    1.21.1·NeoForge1.1.41.1.4 · duplicationless-1.21.1-1.1.4.jar·11 Jan 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 55.3 KB
    1.20.1·Forge1.1.41.1.4 · duplicationless-1.20.1-1.1.4.jar·11 Jan 2026PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 803.1 KB
    1.18.2The latest file for its Minecraft version and loader·Forge1.1.41.1.4 · duplicationless-1.18.2-1.1.4.jar·11 Jan 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 803.1 KB
    1 to 20 of 117123456

    Quick fixes

    In the last 2 years, 2 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

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.2

    • duplicationless-1.21.1-1.0.72 Dec 20251.0.7 Fix ChunkData#rebuildChunk logic.
    • duplicationless-1.21.1-1.0.226 Nov 20251.0.2 Fix ChunkData rebuild and load logic Cache…