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    2,054,849 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 2026.269,417 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.

    CB: Compressed Blocks

    Mod

    A block and item compression mod for Minecraft.

    A96/ 100
    • OverviewA
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 26.3
    • ModpacksIn 421
    • ReleasesLatest 15 Oct

    Download

    compressedblocks-fabric-3.1.0-26.3.jar

    Released 15 Oct 2026 · 17.1 MB

    Passed: our checks found nothing harmful in this file.

    Download

    Required to run

    • Fabric APIAMinecraft 26.3 · Fabric (release 0.165.0)
    • Forge Config API PortAMinecraft 26.3 · Fabric (release 26.3.1)
    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 5 of the last 24 months−2 points
    • Some modpacks removed it−1 point
    All 11 criteria

    • Maintenance

      2 points lost25 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.9 days ago (15 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 on Forge, Fabric and NeoForge (latest) 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 5 of the last 24 months 4 / 6

    • Stability

      1 point lost21 / 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.41 of the 352 modpacks with two or more versions removed it in a later one (12%) See the 41 modpacks9 / 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 15 releases in 2 years needed a quick fix (7%) 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 points10 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · sa-shiro/Minecraft-Compressed-Blocks 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · sa-shiro/Minecraft-Compressed-Blocks 3 / 3

    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.3,687,176 4 / 4

    • Track record

      Full points8 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.6.7 years, 179 releases 8 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 17 latest files for recent Minecraft versions. See Security
    Total96 / 100

    68.2 of the 71 points that apply = 96 out of 100. The points above are rounded to whole numbers.

    Images

    • Compressed Blocks
    • Crates
    • Advancements
    • Advancements
    • Recipes
    • Recipes
    • Recipes
    • Recipes

    About

    CB: Compressed Blocks helps save space by compressing blocks into compact variants that can still be placed in the world, and items into crates for compact inventory storage. Combine nine identical blocks or items in a 3×3 crafting grid for standard compression, or use the 2×2 recipe for entries that already have a 3×3 crafting recipe; compress variants repeatedly to reach higher levels. You can reverse the process one level at a time to recover the original blocks or items, and a maximum-level variant can represent up to 3,486,784,401 of them. The mod includes 264 compressed block types and 179 crate types, and users or modpack developers can extend or override its entries with custom definitions and resource-pack assets, including support for blocks and items from other mods without dedicated integrations.

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

    In-game changes

    Does not change the game's code directly.

    Adds 3,670 blocks and at least 4,702 advancements.

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

    Replaces 2 of vanilla Minecraft's tags.

    Often used with it

    See all 30
    ChippedCMekanism GeneratorsBFTB Chunks (NeoForge)ACooking for BlockheadsAMacaw's TrapdoorsA

    Details

    Creator
    Sashiro
    License
    MIT License
    Downloads
    3.7M
    Created
    4 Feb 2020
    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

    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 Fabric 1.20.1 to 26.3; NeoForge 1.21 to 26.3; Forge 1.20.1 to 26.3.

    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 · 40 of 43 latest files checked, last on 17 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.
      43 latest files: the newest file for each Minecraft version and loader. The answer above is about the 17 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 17 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 17 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
      36 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
      55 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
      37 code files read

    Compatibility

    See all 179 files
    Fabric
    NeoForge
    Forge
    1.141.171.2026.1

    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.
    Fabric APIin some filesAForge Config API Portin some filesA
    OptionalProjects it can work with but does not need. The author lists them.
    Mod Menuin some filesAForge Config API Portin some filesA
    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 247 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
    50250
    Oct 2024: 22 modpacksNov 2024: 23 modpacksDec 2024: 34 modpacksJan 2025: 25 modpacksFeb 2025: 27 modpacksMar 2025: 22 modpacksApr 2025: 22 modpacksMay 2025: 29 modpacksJun 2025: 27 modpacksJul 2025: 27 modpacksAug 2025: 30 modpacksSep 2025: 26 modpacksOct 2025: 25 modpacksNov 2025: 36 modpacksDec 2025: 41 modpacksJan 2026: 40 modpacksFeb 2026: 36 modpacksMar 2026: 29 modpacksApr 2026: 26 modpacksMay 2026: 25 modpacksJun 2026: 25 modpacksJul 2026: 28 modpacksAug 2026: 23 modpacksSep 2026: 21 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 202422
    Nov 202423
    Dec 202434
    Jan 202525
    Feb 202527
    Mar 202522
    Apr 202522
    May 202529
    Jun 202527
    Jul 202527
    Aug 202530
    Sep 202526
    Oct 202525
    Nov 202536
    Dec 202541
    Jan 202640
    Feb 202636
    Mar 202629
    Apr 202626
    May 202625
    Jun 202625
    Jul 202628
    Aug 202623
    Sep 202621

    421 modpacks include CB: Compressed Blocks in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    DarkRPG - RPG with Magic, Origins, Quests, Adventure3.9M downloadslast version with it 24 Oct 2026DarkRPG - RPG with Vampires, Dragons, Magic, Quests, Adventure840K downloadslast version with it 20 Oct 2026Techopolis 3494K downloadslast version with it 20 Oct 2026FTB Evolution423K downloadslast version with it 12 Oct 2026Seaopolis Submerged 2187K downloadslast version with it 27 Sep 2026Farming Crossing 4178K downloadslast version with it 7 Aug 2024Farming Crossing 5: Made to Order!174K downloadslast version with it 18 Aug 2025The Backrooms survival86K downloadslast version with it 13 Dec 2023Mystic's Monstrosity84K downloadslast version with it 27 Jan 2026Biomes and Dungeons (BAD) RPG & Magic50K downloadslast version with it 18 Oct 2026
    1 to 10 of 30123

    Often in the same modpacks

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

    ProjectTypeShareGrade
    ChippedCModin 50% of the modpacks with CB: Compressed BlocksMekanism GeneratorsBModin 50% of the modpacks with CB: Compressed BlocksFTB Chunks (NeoForge)AModin 49% of the modpacks with CB: Compressed BlocksCooking for BlockheadsAModin 48% of the modpacks with CB: Compressed BlocksMacaw's TrapdoorsAModin 47% of the modpacks with CB: Compressed BlocksElevatorModAModin 46% of the modpacks with CB: Compressed BlocksFTB Ultimine (NeoForge)AModin 46% of the modpacks with CB: Compressed BlocksAttributeFixAModin 46% of the modpacks with CB: Compressed BlocksMacaw's FurnitureBModin 46% of the modpacks with CB: Compressed BlocksTrash CansAModin 45% of the modpacks with CB: Compressed Blocks
    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·Fabric3.1.03.1.0 · compressedblocks-fabric-3.1.0-26.3.jarSends: None foundRequires:Fabric API, Forge Config API PortFabric API, Forge Config API PortPassedOur checks found nothing harmful in this file. Its code was read too.
    26.1 to 26.3·NeoForge3.1.03.1.0 · compressedblocks-neoforge-3.1.0-26.3.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.1 to 26.3·Forge3.1.03.1.0 · Compressed Blocks-forge-26.3-3.1.0-26.3.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.11·Fabric3.1.03.1.0 · compressedblocks-fabric-3.1.0-1.21.11.jarSends: None foundRequires:Fabric API, Forge Config API PortFabric API, Forge Config API PortPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.11·NeoForge3.1.03.1.0 · compressedblocks-neoforge-3.1.0-1.21.11.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.11·Forge3.1.03.1.0 · Compressed Blocks-forge-1.21.11-3.1.0-1.21.11.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.6 to 1.21.10·Fabric2.0.02.0.0 · compressedblocks-fabric-2.0.0-1.21.10.jarSends: None foundRequires:Forge Config API PortPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.6 to 1.21.10·NeoForge2.0.02.0.0 · compressedblocks-neoforge-2.0.0-1.21.10.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.4 to 1.21.5·Fabric2.0.02.0.0 · compressedblocks-fabric-2.0.0-1.21.5.jarSends: None foundRequires:Forge Config API PortPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.4 to 1.21.5·NeoForge2.0.02.0.0 · compressedblocks-neoforge-2.0.0-1.21.5.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1 to 10 of 4312345

    179 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    26.1 to 26.326.1 to 26.3The latest file for its Minecraft version and loader·Fabric3.1.03.1.0 · compressedblocks-fabric-3.1.0-26.3.jar (main file)·15 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 17.1 MB
    26.1 to 26.326.1 to 26.3The latest file for its Minecraft version and loader·NeoForge3.1.03.1.0 · compressedblocks-neoforge-3.1.0-26.3.jar (main file)·15 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 17.6 MB
    26.1 to 26.326.1 to 26.3The latest file for its Minecraft version and loader·Forge3.1.03.1.0 · Compressed Blocks-forge-26.3-3.1.0-26.3.jar (main file)·15 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 17.6 MB
    1.21.11The latest file for its Minecraft version and loader·Fabric3.1.03.1.0 · compressedblocks-fabric-3.1.0-1.21.11.jar (main file)·14 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 17.0 MB
    1.21.11The latest file for its Minecraft version and loader·NeoForge3.1.03.1.0 · compressedblocks-neoforge-3.1.0-1.21.11.jar (main file)·14 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 17.4 MB
    1.21.11The latest file for its Minecraft version and loader·Forge3.1.03.1.0 · Compressed Blocks-forge-1.21.11-3.1.0-1.21.11.jar (main file)·14 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 17.4 MB
    1.20.1The latest file for its Minecraft version and loader·Fabric3.0.03.0.0 · compressedblocks-fabric-3.0.0-1.20.1.jar (main file)·11 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 15.9 MB
    1.20.1The latest file for its Minecraft version and loader·Forge3.0.03.0.0 · compressedblocks-forge-3.0.0-1.20.1.jar (main file)·11 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 16.9 MB
    1.20.2 to 1.20.41.20.2 to 1.20.4The latest file for its Minecraft version and loader·Fabric3.0.03.0.0 · compressedblocks-fabric-3.0.0-1.20.2.jar (main file)·11 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 15.9 MB
    1.20.2 to 1.20.41.20.2 to 1.20.4The latest file for its Minecraft version and loader·NeoForge3.0.03.0.0 · compressedblocks-neoforge-3.0.0-1.20.2.jar (main file)·11 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 16.4 MB
    1.20.2 to 1.20.41.20.2 to 1.20.4The latest file for its Minecraft version and loader·Forge3.0.03.0.0 · compressedblocks-forge-3.0.0-1.20.2.jar (main file)·11 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 16.9 MB
    1.21 to 1.21.11.21 to 1.21.1The latest file for its Minecraft version and loader·Fabric3.0.03.0.0 · compressedblocks-fabric-3.0.0-1.21.1.jar (main file)·8 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 15.6 MB
    1.21 to 1.21.11.21 to 1.21.1The latest file for its Minecraft version and loader·NeoForge3.0.03.0.0 · compressedblocks-neoforge-3.0.0-1.21.1.jar (main file)·8 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 15.1 MB
    1.21 to 1.21.11.21 to 1.21.1The latest file for its Minecraft version and loader·Forge3.0.03.0.0 · compressedblocks-forge-3.0.0-1.21.1.jar (main file)·8 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 15.1 MB
    1.21.4 to 1.21.51.21.4 to 1.21.5The latest file for its Minecraft version and loader·Fabric2.0.02.0.0 · compressedblocks-fabric-2.0.0-1.21.5.jar (main file)·4 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 13.5 MB
    1.21.4 to 1.21.51.21.4 to 1.21.5The latest file for its Minecraft version and loader·NeoForge2.0.02.0.0 · compressedblocks-neoforge-2.0.0-1.21.5.jar (main file)·4 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 13.0 MB
    1.21.4 to 1.21.51.21.4 to 1.21.5The latest file for its Minecraft version and loader·Forge2.0.02.0.0 · compressedblocks-forge-2.0.0-1.21.5.jar (main file)·4 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 13.0 MB
    1.21.6 to 1.21.101.21.6 to 1.21.10The latest file for its Minecraft version and loader·Fabric2.0.02.0.0 · compressedblocks-fabric-2.0.0-1.21.10.jar (main file)·1 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 13.6 MB
    1.21.6 to 1.21.101.21.6 to 1.21.10The latest file for its Minecraft version and loader·NeoForge2.0.02.0.0 · compressedblocks-neoforge-2.0.0-1.21.10.jar (main file)·1 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 13.0 MB
    1.21.11·Fabric2.0.02.0.0 · compressedblocks-fabric-2.0.0-1.21.11.jar (main file)·29 Sep 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForge. CurseForge file not checked: its author does not let other sites download it from CurseForge.Download · Stable · 13.6 MB
    1 to 20 of 17912345…9

    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

    • NEO-FORGE v1.8.2-1.21.428 Mar 2025…FORGE --- NeoForge - fixed registration not working - updated neoforge version…