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    2,053,304 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 2026.269,472 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.

    Skyblock Builder

    Mod

    Let you create a custom skyblock island via config

    A97/ 100
    • OverviewA
    • SecurityPassed
    • PrivacyGoes online
    • AINone found
    • CompatibilityUp to 26.1.2
    • ModpacksIn 703
    • ReleasesLatest 3 Oct

    Download

    SkyblockBuilder-26.1.4.jar Beta

    Released 3 Oct 2026 · 603.1 KB

    Passed: our checks found nothing harmful in this file.

    Download

    Required to run

    • LibXAMinecraft 26.1.2 · NeoForge (release 7.0.4)
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade A

    How grades work

    Strengths

    • Security checks passed
    • Regular releases for Minecraft 26.1.2, a version many recently updated mods still support
    • Public source code and issue tracker
    • Widely used
    • Around for years

    Points lost

    • Releases replaced within 3 days to fix a problem−2 points
    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.3 weeks ago (3 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.26.1.2 on NeoForge, 1.20.1 on Forge. 15% or more of the popular mods updated in the last 6 months also have files for 26.1.2. 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 17 of the last 24 months 6 / 6

    • Stability

      2 points lost20 / 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.24 of the 369 modpacks with two or more versions removed it in a later one (7%) 10 / 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 43 releases in 2 years needed a quick fix (19%) See the 8 releases5 / 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, and it counts 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 · ChaoticTrials/SkyblockBuilder 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · ChaoticTrials/SkyblockBuilder 3 / 3

    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.23,002,174 4 / 4

    • Track record

      Full points8 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.5.7 years, 269 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
    Total97 / 100

    69 of the 71 points that apply = 97 out of 100.

    Images

    • Screenshot 1 of Skyblock Builder

    About

    Skyblock Builder lets players and modpack or server creators generate custom skyblock islands from configuration and a schematic made with Minecraft’s Structure Block or the mod’s Structure Saver item. The island’s possible spawn points can be specified, and the mod adds a Skyblock world type for creating a new world. Server administrators can also use it to create a Hellblock-style setup by placing the spawn in the Nether, where the Nether becomes the sky above ten layers of lava while the Overworld and End retain their default generation.

    Written from Modrinth and the GitHub README . How we write it

    In-game changes

    Changes the game's code in 7 areas: Blocks and fluidsChanges 2 game code files in this area: how blocks, fluids and redstone work., User interfaceChanges 2 game code files in this area: menus, screens, tooltips, the chat window and the in-game overlay., Rendering and graphicsChanges 1 game code file in this area: drawing mobs, items, particles and textures on screen., PlayerChanges 1 game code file in this area: your character: movement, abilities, hunger and controls., Networking and multiplayerChanges 1 game code file in this area: connections, the server list and what is sent between your game and a server., Game data and resourcesChanges 1 game code file in this area: recipes, tags, advancements, language files and other game data. and Server and world logicChanges 1 game code file in this area: the world, commands, scoreboards, saved data and game rules..

    Adds 1 block: Spawn Block; 1 item: Structure Saver.

    Counted from the names and data files in the mod, so the list may not be complete.

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

    Often used with it

    See all 30
    FTB Chunks (NeoForge)AFTB Ultimine (NeoForge)AMekanism GeneratorsBConstruction WandCCrafting TweaksA

    Details

    Creator
    MelanX
    License
    Apache License 2.0
    Downloads
    23M
    Created
    22 Feb 2021
    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

    Uses folders outside the game
    It can read or write files outside your Minecraft folder, on the rest of your computer. Only in its files for NeoForge 1.21.1 to 26.1.2; Forge 1.20.1.
    Creates settings files
    The mod keeps its settings in the config folder of your game, where you can change or delete them. 9 files 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. It contacts 1 web address. 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 13 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.
      13 latest files: the newest file for each Minecraft version and loader. The answer above is about the 5 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.
    • Uses folders outside the game
      Finds the Minecraft folder.
    • 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 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
    • sessionserver.mojang.com
      Talks to the Minecraft login service.
    • 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
      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
      5 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
      273 code files read

    Compatibility

    See all 269 files
    NeoForge
    Forge
    1.161.191.2126.1

    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.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.
    LibXA
    OptionalProjects it can work with but does not need. The author lists them.
    MineMentionDCurios APIAInfiniversein some filesAOdyssey Questsin some filesBOdyssey Claimsin some filesB
    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 26.1.2. Many recently updated mods still support 26.1.2.

    Known conflicts

    These projects do not work together with Skyblock Builder: their authors or Skyblock Builder'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 Skyblock Builder, so you only need one.

    ProjectTypeDownloadsDeclared by
    NeoBlock - The new OneBlockMod92K downloadsdeclared by NeoBlock - The new OneBlock

    Related projects

    Projects that need Skyblock Builder to work.

    ProjectTypeDownloadsGrade
    Sky GUIsAMod10.6M downloads

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    80400
    Oct 2024: 50 modpacksNov 2024: 41 modpacksDec 2024: 42 modpacksJan 2025: 37 modpacksFeb 2025: 42 modpacksMar 2025: 48 modpacksApr 2025: 52 modpacksMay 2025: 55 modpacksJun 2025: 45 modpacksJul 2025: 43 modpacksAug 2025: 41 modpacksSep 2025: 27 modpacksOct 2025: 34 modpacksNov 2025: 39 modpacksDec 2025: 39 modpacksJan 2026: 38 modpacksFeb 2026: 32 modpacksMar 2026: 36 modpacksApr 2026: 42 modpacksMay 2026: 54 modpacksJun 2026: 49 modpacksJul 2026: 51 modpacksAug 2026: 51 modpacksSep 2026: 61 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 202450
    Nov 202441
    Dec 202442
    Jan 202537
    Feb 202542
    Mar 202548
    Apr 202552
    May 202555
    Jun 202545
    Jul 202543
    Aug 202541
    Sep 202527
    Oct 202534
    Nov 202539
    Dec 202539
    Jan 202638
    Feb 202632
    Mar 202636
    Apr 202642
    May 202654
    Jun 202649
    Jul 202651
    Aug 202651
    Sep 202661

    703 modpacks include Skyblock Builder in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    All in One [Modded One Block]4.3M downloadslast version with it 3 Sep 2023All the Mods 10: To the Sky ATM10SKY3.6M downloadslast version with it 19 Oct 2026All the Mods 9 - To the Sky - atm9sky3.1M downloadslast version with it 24 Apr 2026Lucky World Invasion2.2M downloadslast version with it 26 Jul 2025All the Mods 7 - To the Sky - atm7sky2.1M downloadslast version with it 18 Apr 2023All the Mods 6 - To the Sky - ATM6sky - Skyblock1.1M downloadslast version with it 27 Apr 2022Star Technology1M downloadslast version with it 6 Oct 2026Modded OneBlock997K downloadslast version with it 10 Feb 2024Seaopolis: Submerged680K downloadslast version with it 31 Aug 2026Cave Factory566K downloadslast version with it 29 Jan 2022
    1 to 10 of 30123

    Often in the same modpacks

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

    ProjectTypeShareGrade
    FTB Chunks (NeoForge)AModin 68% of the modpacks with Skyblock BuilderFTB Ultimine (NeoForge)AModin 61% of the modpacks with Skyblock BuilderMekanism GeneratorsBModin 56% of the modpacks with Skyblock BuilderConstruction WandCModin 55% of the modpacks with Skyblock BuilderCrafting TweaksAModin 55% of the modpacks with Skyblock BuilderPipezAModin 52% of the modpacks with Skyblock BuilderTrash CansAModin 52% of the modpacks with Skyblock BuilderMystical AgricultureAModin 50% of the modpacks with Skyblock BuilderBuilding GadgetsAModin 49% of the modpacks with Skyblock BuilderFlux NetworksCModin 49% of the modpacks with Skyblock Builder
    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
    26.1.2·NeoForge26.1.426.1.4 · SkyblockBuilder-26.1.4.jarSends: Nothing about youRequires:LibXPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1·NeoForge21.1.3121.1.31 · SkyblockBuilder-21.1.31.jarSends: Nothing about youRequires:LibXPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·NeoForge5.1.285.1.28 · SkyblockBuilder-1.20.1-5.1.28.jarSends: Nothing about youRequires:LibXPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·NeoForge5.1.265.1.26 · SkyblockBuilder-1.20.1-5.1.26.jarSends: Nothing about youRequires:LibXPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge5.1.335.1.33 · SkyblockBuilder-1.20.1-5.1.33.jarSends: Nothing about youRequires:LibXPassedOur checks found nothing harmful in this file. Its code was read too.
    Older Minecraft versions
    1.19.2·Forge4.2.104.2.10 · SkyblockBuilder-1.19.2-4.2.10.jarSends: Nothing about youRequires:LibXPassedOur checks found nothing harmful in this file. Its code was read too.
    1.19.1·Forge4.1.24.1.2 · SkyblockBuilder-1.19.1-4.1.2.jarSends: Nothing about youRequires:LibXPassedOur checks found nothing harmful in this file. Its code was read too.
    1.19·Forge4.0.194.0.19 · SkyblockBuilder-1.19-4.0.19.jarSends: Nothing about youRequires:LibXPassedOur checks found nothing harmful in this file. Its code was read too.
    1.18.2·Forge3.3.253.3.25 · SkyblockBuilder-1.18.2-3.3.25.jarSends: Nothing about youRequires:LibXPassedOur checks found nothing harmful in this file. Its code was read too.
    1.18.1·Forge3.2.93.2.9 · SkyblockBuilder-1.18.1-3.2.9.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1 to 10 of 1312

    269 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    26.1.2The latest file for its Minecraft version and loader·NeoForge26.1.426.1.4 · SkyblockBuilder-26.1.4.jar (main file)Beta·3 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 603.1 KB
    26.1.2·NeoForge26.1.326.1.3 · SkyblockBuilder-26.1.3.jar (main file)Beta·2 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 603.0 KB
    26.1.2·NeoForge26.1.226.1.2 · SkyblockBuilder-26.1.2.jar (main file)Beta·27 Sep 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 601.6 KB
    1.21.1·NeoForge21.1.3721.1.37 · SkyblockBuilder-21.1.37.jar (main file)Beta·27 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 599.7 KB
    26.1.2·NeoForge26.1.126.1.1 · SkyblockBuilder-26.1.1.jar (main file)Beta·23 Sep 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 601.6 KB
    26.1.2·NeoForge26.1.026.1.0 · SkyblockBuilder-26.1.0.jar (main file)Beta·6 Sep 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 593.8 KB
    1.21.1·NeoForge21.1.3621.1.36 · SkyblockBuilder-21.1.36.jar (main file)Beta·4 Sep 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 599.8 KB
    1.21.1·NeoForge21.1.3521.1.35 · SkyblockBuilder-21.1.35.jar (main file)Beta·30 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 598.1 KB
    1.21.1·NeoForge21.1.3421.1.34 · SkyblockBuilder-21.1.34.jar (main file)Beta·6 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 587.4 KB
    1.21.1·NeoForge21.1.3321.1.33 · SkyblockBuilder-21.1.33.jar (main file)Beta·6 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 584.3 KB
    1.21.1·NeoForge21.1.3221.1.32 · SkyblockBuilder-21.1.32.jar (main file)Alpha·2 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Alpha · 584.2 KB
    1.20.1The latest file for its Minecraft version and loader·Forge5.1.335.1.33 · SkyblockBuilder-1.20.1-5.1.33.jar (main file)·7 Jun 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 448.2 KB
    1.21.1The latest file for its Minecraft version and loader·NeoForge21.1.3121.1.31 · SkyblockBuilder-21.1.31.jar (main file)·7 Jun 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 578.7 KB
    1.21.1·NeoForge21.1.3021.1.30 · SkyblockBuilder-21.1.30.jar (main file)Beta·7 Jun 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 578.5 KB
    1.21.1·NeoForge21.1.2921.1.29 · SkyblockBuilder-21.1.29.jar (main file)Beta·20 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 574.8 KB
    1.21.1·NeoForge21.1.2821.1.28 · SkyblockBuilder-21.1.28.jar (main file)Beta·20 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 574.7 KB
    1.20.1·Forge5.1.325.1.32 · SkyblockBuilder-1.20.1-5.1.32.jar (main file)·19 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 448.0 KB
    1.21.1·NeoForge21.1.2721.1.27 · SkyblockBuilder-21.1.27.jar (main file)Beta·17 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 572.7 KB
    1.20.1·Forge5.1.315.1.31 · SkyblockBuilder-1.20.1-5.1.31.jar (main file)·17 Apr 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 440.3 KB
    1.20.1·Forge5.1.305.1.30 · SkyblockBuilder-1.20.1-5.1.30.jar (main file)·17 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 440.3 KB
    1 to 20 of 26912345…14

    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 2 points.

    See them, newest first

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

    • SkyblockBuilder-26.1.4.jar3 Oct 2026…Fix re-joining an unloaded dimension - MelanX…
    • SkyblockBuilder-21.1.29.jar20 Apr 2026…Fix nether spreads being placed status not saved - MelanX…
    • SkyblockBuilder-1.20.1-5.1.32.jar19 Apr 2026…Fix template rendering bounding in customize screen…
    • SkyblockBuilder-21.1.11.jar31 Mar 2025…Fix server crash on startup - MelanX
    • SkyblockBuilder-21.1.9.jar26 Mar 2025…Fix experimental warning not disabled correctly - MelanX…
    • SkyblockBuilder-21.1.6.jar9 Mar 2025…Fix surrounding blocks not being placed - MelanX…
    • SkyblockBuilder-21.1.3.jar3 Mar 2025…Fix empty data being sent - MelanX…
    • SkyblockBuilder-21.1.1.jar25 Feb 2025…Fix rendering of template preview - MelanX…