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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.

    Refraction

    Mod

    Refraction is an API for general use purposes.

    C75/ 100
    • OverviewC
    • SecurityPassed
    • PrivacyGoes online
    • AINone found
    • CompatibilityUp to 1.21.1
    • ModpacksIn 55
    • ReleasesLatest 5 Feb

    Download

    refraction-neoforge-1.21.1-1.3.0.jar

    Released 5 Feb 2026 · 9.8 MB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade C

    How grades work

    Strengths

    • Security checks passed
    • Public source code and issue tracker

    Points lost

    • No release in 9 months−12 points
    • Releases in only 4 of the last 24 months−3 points
    • Some modpacks removed it−1 point
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      10 points lost17 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.9 months ago (5 Feb 2026) 5 / 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.1.21.1 on NeoForge, 1.20.1 on Forge. 15% or more of the popular mods updated in the last 6 months also have files for 1.21.1. 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 4 of the last 24 months 3 / 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.5 of the 37 modpacks with two or more versions removed it in a later one (14%) See the 5 modpacks9 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.No quick fix in 2 years 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 · Clockwork-Interactive/RefractionAPI-MC 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · Clockwork-Interactive/RefractionAPI-MC 3 / 3

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.120,050 3 / 4

    • Track record

      5 points lost3 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.2.4 years, 5 releases 3 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in both latest files for recent Minecraft versions. See Security
    Total75 / 100

    53.5 of the 71 points that apply = 75 out of 100. The points above are rounded to whole numbers.

    Images

    • 🤤🤤🤤

    About

    Refraction is a general-purpose library of reusable code intended to make feature development across Minecraft projects easier, including implementing features such as cutscenes. Its documented feature set spans configuration and persistent data storage, server-to-client synchronization and data channels, event and runnable handling, voxel and particle utilities, and collision boxes that need not be axis-aligned. Other listed tools cover code-defined cutscenes, debugging, NPC interactions and quest handling, server-controlled screens, tracking sounds, flood filling, camera shake, and vector utilities. Most of these listed features are only available in unpublished versions, so the full feature list should not be taken as a description of what is currently released.

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

    In-game changes

    Changes the game's code in 10 areas, as a library other mods build on: Rendering and graphicsChanges 6 game code files in this area: drawing mobs, items, particles and textures on screen., Mobs and their behaviorChanges 5 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., User interfaceChanges 3 game code files in this area: menus, screens, tooltips, the chat window and the in-game overlay., PlayerChanges 3 game code files in this area: your character: movement, abilities, hunger and controls., Networking and multiplayerChanges 3 game code files in this area: connections, the server list and what is sent between your game and a server., Game optionsChanges 2 game code files in this area: settings, key bindings and the option screens., Server and world logicChanges 2 game code files in this area: the world, commands, scoreboards, saved data and game rules., World generationChanges 1 game code file in this area: terrain, biomes and structures made when new land is created., World renderingChanges 1 game code file in this area: drawing the terrain, sky, clouds and weather. and Game coreChanges 1 game code file in this area: the main loop, lighting and other code the whole game uses..

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

    Often used with it

    See all 29
    SecurityCraftASCP-939, With Many VoicesCYUNG's Better Nether FortressesASCP-035, The Possessive MaskCYUNG's Better Jungle TemplesA

    Details

    Creators
    Clockwork Interactive (Zeus)
    License
    GNU General Public License v3.0 or later
    Downloads
    120K
    Created
    14 Jun 2024
    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

    Can download and run new code
    The same part of the code can download data and run it as code. Auto-updaters do this, and so does malware. Only in its files for NeoForge 1.21.1.Not a Warning: we read its code and found no code downloaded over http or run without a check.
    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 and the temporary files folder.
    Connects to the internet
    It has code that can go online, for example to check for updates, load skins or send crash reports. Found in classgraph, a library it includes and in reflections, a library it includes. 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 · Both 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.
      2 latest files: the newest file for each Minecraft version and loader. Both 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.
    • Uses folders outside the game
      Uses the temporary files 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.
    • Modrinth and CurseForgeA release with a different file on Modrinth and on CurseForge, whose code is not the same. Each file is checked on its own. Nothing is blocked.
      Minecraft 1.21.1 · NeoForge · release 1.2.0 · 7 Sep 2025: Modrinth refraction-neoforge-1.21.1-1.2.0.jar, CurseForge refraction-neoforge-1.21.1-1.2.0.jar. 2 classes changed, 1 class only in the CurseForge file, in net.refractionapi.refraction: Refraction, Atda, Scheduler (CurseForge only).
      code differs in 1 release

    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 · Both 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 both 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.
    • 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 so far that AI was used to make it

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

    We have not read its 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 · 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.
      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
      1 of 11 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
    • Sounds in its filesThe tags of the sound files in the files you download, where some AI music tools write their name.
      Nothing found
      3 sounds 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
      863 code files read

    Compatibility

    See all 5 files
    NeoForge
    Forge
    1.201.2126.126.3

    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.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 1.21.1. Many recently updated mods still support 1.21.1.

    Related projects

    Projects that need Refraction to work.

    ProjectTypeDownloadsGrade
    [SCP] | Secure Craft ProtectDMod92K downloadsFazbear Franchise Package - FNAFDMod9.6K downloadsSpawnableEMod1K downloads

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    840
    Oct 2024: 4 modpacksNov 2024: 3 modpacksDec 2024: 6 modpacksJan 2025: 7 modpacksFeb 2025: 5 modpacksMar 2025: 6 modpacksApr 2025: 7 modpacksMay 2025: 4 modpacksJun 2025: 6 modpacksJul 2025: 7 modpacksAug 2025: 4 modpacksSep 2025: 2 modpacksOct 2025: 2 modpacksNov 2025: 2 modpacksDec 2025: 4 modpacksJan 2026: 2 modpacksFeb 2026: 0 modpacksMar 2026: 1 modpackApr 2026: 2 modpacksMay 2026: 1 modpackJun 2026: 1 modpackJul 2026: 2 modpacksAug 2026: 1 modpackSep 2026: 2 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 20244
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    Jan 20257
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    Fewer modpacks put it in their new versions than a year ago: 2 a month now, 5 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..

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

    ModpackDownloadsLast version with it
    Horror Craft Reanimated26K downloadslast version with it 26 Dec 2025Horaura SMP2.8K downloadslast version with it 23 Oct 2024SCP: Blackout Protocol2.7K downloadslast version with it 26 Apr 2025Epoch: Expedition - The New World2.6K downloadslast version with it 2 Jan 2025Lost Souls1.9K downloadslast version with it 4 Oct 2025Arcane-Protocol1.8K downloadslast version with it 14 Nov 2025Gabab03f's Variety1.6K downloadslast version with it 16 Jul 2024SCP-Foundation Creation1.5K downloadslast version with it 11 Feb 2025The Ancient Hell1.3K downloadslast version with it 14 Apr 2025SCP: Roleplay1.3K downloadslast version with it 5 Oct 2024
    1 to 10 of 30123

    Often in the same modpacks

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

    ProjectTypeShareGrade
    SecurityCraftAModin 56% of the modpacks with RefractionSCP-939, With Many VoicesCModin 53% of the modpacks with RefractionYUNG's Better Nether FortressesAModin 53% of the modpacks with RefractionSCP-035, The Possessive MaskCModin 49% of the modpacks with RefractionYUNG's Better Jungle TemplesAModin 49% of the modpacks with RefractionYUNG's Better Witch HutsAModin 47% of the modpacks with RefractionYUNG's Better Desert TemplesAModin 47% of the modpacks with RefractionYUNG's Better Ocean MonumentsAModin 47% of the modpacks with RefractionSCP-079, The Old AICModin 45% of the modpacks with RefractionSCP-087, The StairwellCModin 45% of the modpacks with Refraction
    1 to 10 of 29123

    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
    1.21.1·NeoForge1.3.01.3.0 · refraction-neoforge-1.21.1-1.3.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·NeoForge, Forge1.3.51.3.5 · refraction-forge-1.20.1-1.3.5.jarSends: Nothing about youRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    5 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.1The latest file for its Minecraft version and loader·NeoForge1.3.01.3.0 · refraction-neoforge-1.21.1-1.3.0.jar (main file)·5 Feb 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 9.8 MB
    1.21.1·NeoForge1.2.11.2.1 · refraction-neoforge-1.21.1-1.2.0.jar (main file)·19 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 7.5 MB
    1.20.1The latest file for its Minecraft version and loader·Forge, NeoForge1.3.51.3.5 · refraction-forge-1.20.1-1.3.5.jar (main file)·2 Oct 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 3.6 MB
    1.21.1·NeoForge1.2.01.2.0 · refraction-neoforge-1.21.1-1.2.0.jar (main file)·7 Sep 2025PassedOur checks found nothing harmful in this file. The Modrinth and CurseForge files do not contain the same code. See Security.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 3.7 MB
    1.20.1·NeoForge, Forge1.0.01.0.0 · refraction-1.0.0-1.20.1.jar (first file)·14 Jun 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 142.6 KB