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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.

    Nether Portal Spread (Legacy Fabric)

    Mod

    Nether blocks slowly spread into the Overworld from portals.

    E33/ 100
    • OverviewE
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.17.1
    • ModpacksIn 66
    • ReleasesLatest Nov 2022

    Download

    netherportalspread-fabric_1.17.x-5.6.jar

    Released 30 Nov 2021 · 24.1 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade E

    How grades work

    Strengths

    • Security checks passed
    • Public source code

    Points lost

    • No release in 4 years−26 points
    • No file for a Minecraft version most modpacks use−9 points
    • Many modpacks removed it−5 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      27 points lost0 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.4 years ago (8 Nov 2022) 0 / 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.1.17.1 on Fabric. About 5.2 years behind popular modding versions. Latest Minecraft: 26.3. Abandoned: no release for 3.9 years; no file for a popular modding version.0 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.No release in the last 24 months 0 / 6

    • Stability

      5 points lost10 / 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.12 of the 50 modpacks with two or more versions removed it in a later one (24%) See the 12 modpacks5 / 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 points7 / 7
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · Serilum/Nether-Portal-Spread 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

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.132,326 3 / 4

    • Track record

      8 points lost0 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.5.1 years, 9 releases 0 / 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. See Security
    Total33 / 100

    20.4 of the 61 points that apply = 33 out of 100. The points above are rounded to whole numbers.

    About

    Nether Portal Spread makes Nether blocks gradually transform the Overworld around Nether portals, with the affected radius and spread behavior configurable. Its default conversion rules can turn stone into netherrack, magma blocks, or Nether quartz ore; grass blocks into crimson nylium; sand into soul sand or soul soil; and logs and leaves into Nether stems and wart blocks, alongside changes such as cobblestone to blackstone and sea lanterns to glowstone. The default settings immediately convert up to 50 nearby blocks when a portal is detected, then continue spreading over time; players can stop the effect by placing four coal blocks within its radius, and the required block and count can be changed. Nearby players can receive messages when spreading starts, is prevented, or the portal is broken, with portal coordinates optionally included. A configurable settings file lets players define which blocks convert into which Nether blocks and set weighted chances, including rules for blocks from other mods.

    Written from CurseForge . How we write it

    In-game changes

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.16 to 1.17.1.

    Does not change the game's code directly.

    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
    Mod MenuALithiumABetterEndBBetterNetherBMore Villagers [Fabric]A

    Details

    Creator
    Serilum
    License
    Not known
    Downloads
    132K
    Created
    19 Sep 2021
    Official page
    CurseForge
    Links
    Source code

    Security

    No harmful code found

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.16 to 1.17.1.

    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 Fabric 1.16 to 1.16.4, 1.17 to 1.17.1.
    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 1.16 to 1.16.4, 1.17 to 1.17.1.

    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 3 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.
      3 latest files: the newest file for each Minecraft version and loader. None is for a recent Minecraft version, so the answer above is about all of them. 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.
      The internet, other programs, updating itself, the webcam or microphone, an AI service.

    Privacy

    We found nothing it sends

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.16 to 1.17.1.

    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 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 Minecraft 1.16 to 1.17.1. See each file in Releases

    AI

    No sign so far that AI was used to make it

    We looked for AI tools in its description, files and images and found none.

    We have not read its changelogs and 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 · 4 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.
      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 in the description
      Changelogs not read yet
    • 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
      6 code files read

    Compatibility

    See all 9 files
    Fabric
    1.161.181.201.2126.1

    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.No file yet for any of the last 6 Minecraft versions.

    Modpacks using this project

    Find modpacks with it

    66 modpacks include Nether Portal Spread (Legacy Fabric) in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    Random Oneblock Skyblock 81K downloadslast version with it 29 Apr 2022Insomnia: Hardcore | Origins, Bosses, Skills68K downloadslast version with it 11 Dec 2022Biomes and Dungeons (BAD) RPG & Magic50K downloadslast version with it 29 Jul 2022Survival Remastered28K downloadslast version with it 5 Mar 2022EchoPack 37.9K downloadslast version with it 23 Jul 2022Lifesteal Mega7.3K downloadslast version with it 13 Apr 2022MC: Unknown [Fabric]5.5K downloadslast version with it 29 Mar 2022FSMP5.5K downloadslast version with it 9 Jan 2023Elysian Fields [FORGE]4.3K downloadslast version with it 30 Jul 2022RankerSMP: Exploratory Revelations3.1K downloadslast version with it 8 Apr 2022
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with Nether Portal Spread (Legacy Fabric). Share: how many of the modpacks with Nether Portal Spread (Legacy Fabric) also have that mod.

    ProjectTypeShareGrade
    Mod MenuAModin 88% of the modpacks with Nether Portal Spread (Legacy Fabric)LithiumAModin 85% of the modpacks with Nether Portal Spread (Legacy Fabric)BetterEndBModin 77% of the modpacks with Nether Portal Spread (Legacy Fabric)BetterNetherBModin 70% of the modpacks with Nether Portal Spread (Legacy Fabric)More Villagers [Fabric]AModin 67% of the modpacks with Nether Portal Spread (Legacy Fabric)Repurposed Structures - FabricAModin 67% of the modpacks with Nether Portal Spread (Legacy Fabric)Wraith WaystonesAModin 65% of the modpacks with Nether Portal Spread (Legacy Fabric)LambDynamicLights - Dynamic LightsAModin 65% of the modpacks with Nether Portal Spread (Legacy Fabric)TerralithAModin 65% of the modpacks with Nether Portal Spread (Legacy Fabric)YUNG's Better Strongholds (Fabric)AModin 64% of the modpacks with Nether Portal Spread (Legacy Fabric)
    1 to 10 of 30123

    Latest files

    The newest file for each Minecraft version and loader. None is for a recent Minecraft version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.

    MinecraftLoaderVersionSecuritySendsRequires
    Older Minecraft versions
    1.17 to 1.17.1·Fabric1.17.x-5.61.17.x-5.6 · netherportalspread-fabric_1.17.x-5.6.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.16.5·Fabric6.56.5 · netherportalspread-fabric_1.16.5-6.5.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.16 to 1.16.4·Fabric1.16.x-5.61.16.x-5.6 · netherportalspread-fabric_1.16.x-5.6.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    9 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.16.5The latest file for its Minecraft version and loader·Fabric6.56.5 · netherportalspread-fabric_1.16.5-6.5.jar·8 Nov 2022PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 49.0 KB
    1.16.5·Fabric6.46.4 · netherportalspread-fabric_1.16.5-6.4.jar·2 Oct 2022PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 49.1 KB
    1.16.5·Fabric6.16.1 · netherportalspread-fabric_1.16.5-6.1.jar·30 Jul 2022PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 20.3 KB
    1.17 to 1.17.11.17 to 1.17.1The latest file for its Minecraft version and loader·Fabric1.17.x-5.61.17.x-5.6 · netherportalspread-fabric_1.17.x-5.6.jar·30 Nov 2021PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 24.1 KB
    1.16 to 1.16.51.16 to 1.16.5The latest file for its Minecraft version and loader·Fabric1.16.x-5.61.16.x-5.6 · netherportalspread-fabric_1.16.x-5.6.jar·30 Nov 2021PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 23.2 KB
    1.17 to 1.17.11.17 to 1.17.1·Fabric1.17.x-5.51.17.x-5.5 · netherportalspread-fabric_1.17.x-5.5.jar·9 Nov 2021PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 24.2 KB
    1.16 to 1.16.51.16 to 1.16.5·Fabric1.16.x-5.51.16.x-5.5 · netherportalspread-fabric_1.16.x-5.5.jar·9 Nov 2021PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 24.1 KB
    1.17 to 1.17.11.17 to 1.17.1·Fabric1.17.x-5.41.17.x-5.4 · netherportalspread-fabric_1.17.x-5.4.jar·19 Sep 2021PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 24.2 KB
    1.16 to 1.16.51.16 to 1.16.5·Fabric1.16.x-5.41.16.x-5.4 · netherportalspread-fabric_1.16.x-5.4.jar·19 Sep 2021PassedOur checks found nothing harmful in this file.Open this file on CurseForgeDownload · Stable · 24.1 KB