How To Download Jarfix to Repair .jar Files on Your PC

By Nic •  Updated: 02/17/23 •  6 min read

If you are having issues with .jar files not working on your PC, Jarfix is a great way to fix it. With Jarfix, you can take existing .jar files on your PC and link them back to Java. This will, in turn, allow you to easily open and use .jar files by double-clicking them instead of having to use other workarounds. On top of this, after you run the Jarfix, all of the .jar files on your PC will get the Java logo and look how .jar files are supposed to. So, without any more delay, here is how to use Jarfix to repair .jar files on your PC.

What we'll cover in this Jarfix guide:

Download & Install Java

Step 1) Downloading Java

Before you can run the Jarfix, you need to make sure that you have the correct version of Java. We have a complete Java guide that you can check, but we will go over the basics here.

First, access the Java download page. On this page, click the version of Java you want and select ‘Windows'. Click the link next to ‘x64 Installer', and the download will start after a few seconds.

Downloading Java

Step 2) Installing Java

With Java downloaded, we can now install it. This is just like any other Windows program. Double-click on the .exe file you downloaded. The Java installer will open. Click next a few times, and Java will begin installing. After a few minutes, the installation will finish. Click the close button, and Java will be installed!

Installing Java

How To Download Jarfix

Options for Downloading Jarfix

There are two primary options for downloading Jarfix. Either method will allow you to download the official version of Jarfix, so feel free to download Jarfix from either of these options.

Option 1) Downloading from Our Website

Jarfix allows websites like ours to provide direct downloads of their software. This means that you can download Jarfix without ever leaving TheBreakdown. Just click on the download button below to start downloading Jarfix right away. You may have to confirm that the file is safe, and as long as it is called ‘jarfix.exe', it is 100% safe to download. Once you've downloaded Jarfix, you can move on to running Jarfix.

Jarfix Download Button

Option 2) Download from the Author's Website

The other option for getting Jarfix is downloading it from the developer's website. Start off by going to Jarfix's official website.

Once you are there, scroll down and click the little blue ‘jarfix.exe' link. This is pointed out in the image below. When you do, Jarfix will start downloading instantly. Just like when downloading from our website, you may need to keep or save Jarfix, and after the download has finished, you can move on to using it.

Downloading Jarfix from the Developer's Website

How To Use Jarfix

Step 1) Running Jarfix

Now that you have Jarfix downloaded, we can run it. This is what actually fixes your .jar files and links them back to Java.

To do this, just double-click on the jarfix.exe file you download. This will open and automatically run the Jarfix program.

Once it is complete, a pop-up will come up that says “The .jar suffix (Java Archive) has been registered successfully. Jar packaged Java applications can be executed again by a double-click”.

This means that .jar files your computer have now been completely fixed, and you no longer will have any issues opening up .jar files.

Running Jarfix to Link .jar Files to Java

Step 2) Confirming Jarfix Has Worked

After you have ran Jarfix, you can check to make sure that it worked by double-clicking on the .jar file you are trying to open. It should open right away.

You will also notice that if your icons weren't Java icons and instead .zip files, WinRAR files, or anything else, this will no longer be the case. They will now display a Java logo.

Frequently Asked Questions

What is Jarfix for?

Jarfix is a simple program that links the .jar files on your computer to Java. By doing this, you will be able to run Java programs and files by just double-clicking them.

Can Jarfix repair a .jar file that won't open?

No, Jarfix cannot repair a broken .jar file that will not open. However, it can allow you to double-click to open Java files that aren't broken. For example, if a .jar file is showing a WinRAR logo instead of a Java logo, running the Jarfix will allow you to open this file by double-clicking it.

Is Jarfix required to open .jar files?

No, all you need to open .jar files is Java. Jarfix will like your .jar files to Java once you have Java installed.

Yes, Jarfix forces Java to start handling .jar files on your computer again. Sometimes, programs like WinRAR, VSCode, or other apps will take over opening .jar files. This isn't ideal, and it can be very annoying when you are trying to open a Java app.

However, when these programs take over your .jar files, the icon on those files changes as well. When you run the Jarfix and link your Java files back to Java, the icons will start displaying the Java logo again showing they are associated with the correct program and can be double-clicked to open.

Where can I get more help with Jarfix?

If you have ran Jarfix and it still hasn't fixed the issues you are having, you may need to check out the FAQ the Jarfix author's website by clicking here. There you will be able to get tons of help with Jarfix and fix any Jarfix related issues. For example, if you can't run Jarfix, that website will show you how to fix it.


I have been playing and modding Minecraft since 2010. In 2014, I started getting interested in creating Minecraft servers and teaching people how to do it online. This led to thousands of videos covering how to do anything and everything in Minecraft!

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