I've been struggling to open .jar files for Minecraft mods, and it's really frustrating. I can open other types of .jar files without any issues, but whenever I try to launch a Minecraft mod .jar, my cursor shows a loading animation for a second and then nothing happens. Here's what I've already tried:
- Uninstalled and reinstalled the latest version of Java
- Used Jarfix, but it didn't solve the problem
- Attempted the Java -jar command
- Even reset my entire computer
I've been at this for about 9 hours now and I don't have much technical experience, so I'd really appreciate any help to fix this!
2 Answers
You're not alone in this struggle! Sometimes different mods can have specific requirements, or there could be issues with your Java installation. Have you tried running the jar file from the command prompt? It can sometimes give you error messages that might help figure out what’s going wrong. Just make sure that you navigate to the folder with the mod and run it with `java -jar modfile.jar`. Let me know what happens!
It sounds like you're dealing with some frustrating tech issues! Most Minecraft mod .jar files are executable, meaning they need to be run with Java, but sometimes it can be tricky if your system doesn't associate that file type correctly. It could help to check your file associations to ensure .jar files are linked to the correct version of Java. Let me know if you need help with that!
Thanks for the tip! I'll check the file associations and see if that helps.

I haven't tried that yet! I'll give the command prompt a shot and see what errors pop up.