AccessWidener Loader
Remaps and loads any number of accesswideners from the .minecraft/config/accesswideners folder (it will generate it after first launch). Useful for example if you want to use a jar mod with fabric but it crashes due to trying to access inaccessible fields / methods / classes. Version independent.
For advanced users: It can only remap accessWideners from the mapping set currently used by the game, but luckily loader 0.15+ changed to use mapping io which means you can launch the game with tiny v2 mappings, which support multiple namespaces. So if you use merged yarn mappings at runtime, you can use named accessWideners instead of just official and intermediary ones. There is an example on using this for Prism / MultiMC in the github readme.
fabric wiki page on accesswideners: https://fabricmc.net/wiki/tutorial:accesswideners
linkie, a useful tool that can generate accesswideners: https://linkie.shedaniel.dev/mappings?namespace=yarn
discord is tildejustin if you need help, accesswideners are fairly technical
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.0, 1.1, 1.2.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as accesswidener-loader-1.0.1.jar — drop this file into the mods folder
- Download size: 149 KB
- Download link checked 31 Aug 2026 — working
These come from our own check of the pack file, not from the source page.