Retromod
ModRun older mods on newer versions of your game.
Why gradeA
How grades workStrengths
Points lost
- First release only 5 months ago−4 points
- Under 5 million downloads−1 point
All 11 criteria
Maintenance
Full points21 / 21Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.5 days ago (19 Oct 2026) 12 / 12Supports 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 (latest) on NeoForge, Forge and Fabric, 26.2 on Quilt 9 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Does not apply. The project is under 6 months old.Stability
Full points15 / 15Removed 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.None of the 3 modpacks with two or more versions removed it 10 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Does not apply. The project is under 6 months old.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 / 5Transparency
Full points10 / 10Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · Bownlux/RetroMod 7 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · Bownlux/Retromod 3 / 3Popularity
1 point lost3 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.60,445 3 / 4Track record
4 points lost4 / 8AgeHow long the project has existed. It counts less when no new file came out recently.5 months, 3194 releases 4 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 59 latest files for recent Minecraft versions. See Security
52.5 of the 58 points that apply = 91 out of 100. The points above are rounded to whole numbers.
Images
About
Retromod helps older Minecraft mods run on newer game versions by translating them at load time, without requiring their original source code or an upstream port. It updates mod bytecode, mappings, mixins, loader metadata, and selected removed APIs, and keeps a backup of the original mod jar. The project is primarily a bridge between game versions, not a general solution for moving mods between loaders, though it includes selected Forge-to-NeoForge migration paths. Simple content mods and quality-of-life mods are its best fit, as are libraries and recipe viewers; mods that replace major parts of the renderer or loader may still need a proper port. Retromod also prepares older resource and data packs: supported texture migrations and pack metadata can be updated, while arbitrary models, shaders, overlays, custom code, and world-generation schemas are not ported. A standalone command-line tool can analyze and transform individual mods or batches, prepare instances, check generated jars for unresolved references, and update resource packs without launching Minecraft. In-game, a file picker lets players select mod jars for transformation, and a settings screen provides controls for active options such as transform verification. A successful transformation is not a guarantee that every feature works, so the result should be tested in-game, especially for mods that affect worlds or saved data.
Written from Modrinth , CurseForge and the GitHub README . How we write it
In-game changes
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.
Details
- License
- MIT License
- Downloads
- 60K
- Created
- 12 May 2026
- Official pages
- Modrinth , CurseForge
- Links
- Source code , Issues , Wiki
Security
No harmful code found
We checked its files and read their code, without running it.
The author declares on Modrinth that this mod interacts with your system outside the game.
What it can do on your computer
- Can update itself
- It can add or replace files in your mods folder, for example to update itself.
- 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, launcher files and application data.
- Starts other programs
- It can start another program on your computer. It can open a web link or a file.
- 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 the mod's own code and in code libraries built into it. See Privacy
- Creates settings files
- The mod keeps its settings in the config folder of your game, where you can change or delete them. 5 files in your config folder.
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
- 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.94 latest files: the newest file for each Minecraft version and loader. The answer above is about the 59 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
- Uses folders outside the gameReads launcher files.Uses the system folder for application data.Finds the Minecraft folder.
- Looked for, not foundWe looked for these in the file and did not find them.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
- 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 59 files, for recent Minecraft versions. See each file in Releases
- api.modrinth.comChecks for a new version of the mod.
- 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
AI was used for its code
The author declares AI code on Modrinth.
The author writes that AI was used.
We looked for AI tools in its texts, files and images 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
- 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.Declares AI code. No 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.Found21 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 found2 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 file1,453 code files read
Compatibility
See all 3,194 filesPoint at or tap a version to see its loaders.
Modpacks using this project
Find modpacks with itModpacks that include Retromod in at least one of their versions, most downloaded first.
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.