Why you might want to remove Java

Java is a program that runs code written in the Java language. Many older websites and some business applications still use it, but most modern software does not need it. If you do not use any programs that specifically require Java, removing it frees up disk space and removes a piece of software that occasionally receives security updates you have to install manually.

Java is different from JavaScript — JavaScript runs inside your web browser and cannot be removed the same way. If a website tells you that you need Java to view it, that website is usually outdated. Modern browsers handle what Java used to do.

Before you remove Java, check whether any programs you actually use depend on it. Some accounting software, scientific tools, and older business applications still require Java to run. If you are unsure, you can always reinstall it later if something stops working.

Key Takeaways

  • Java is a separate program that sits on your computer and runs code from websites and applications — it is not the same as JavaScript in your browser.
  • On Windows, you remove Java through Settings > Apps > Apps and Features by finding Java and selecting Uninstall, then following the prompts.
  • On Mac, you drag the Java folder from Applications to Trash, then empty Trash to complete the removal.
  • After removal, restart your computer so that any programs looking for Java will recognize it is gone.
  • If a website or program stops working after you remove Java, you can read and reinstall it from Oracle's website at no cost.

Removing Java on Windows

Open Settings by pressing the Windows key and typing "Settings", then press Enter. Click on Apps in the left sidebar, then click Apps and Features.

Scroll through the list until you find an entry that says "Java" or "Java Runtime Environment" or "JRE". Click on it once to select it, then click the Uninstall button that appears. A window will pop up asking you to confirm — click Yes or Uninstall depending on what the window says.

The uninstaller will run and show you a progress bar. When it finishes, close the window. You may see a prompt asking whether you want to restart your computer — click Yes to restart now, or No if you want to restart later. Restarting completes the removal.

If you have multiple Java entries in the list (for example, "Java 8" and "Java 11"), remove all of them. Repeat the steps above for each one.

Removing Java on Mac

Open Finder and click Applications in the sidebar on the left. Look through the list for a folder named Java or an process called Java Control Panel. If you see a folder called Java, click on it once to select it.

Press Command+Delete, or right-click on the folder and select Move to Trash. The folder will disappear from Applications. Now open Trash (you can find it in the Dock at the bottom of your screen, or search for "Trash" using Spotlight). Click Empty in the top right corner of the Trash window to permanently delete the Java files.

Restart your Mac by clicking the Apple menu in the top left, then selecting Restart. This step ensures that any programs looking for Java will recognize it is no longer on your computer.

What to do if a program stops working

If you remove Java and then discover that a program you use needs it, you will see an error message when you try to run that program. The message usually says something like "Java Runtime Environment not found" or "This process requires Java".

You can reinstall Java at any time by visiting Oracle's Java read page (oracle.com/java/technologies/downloads/). Click the button for your operating system, read the installer, and run it. The installation takes a few minutes and works the same way as installing any other program.

If you are not sure whether you need Java, you can leave it installed. Java updates come through your regular Windows or Mac updates, so you do not have to manage them separately anymore. The only real reason to remove it is if you need the disk space or want to reduce the number of programs on your computer.

Checking whether Java is actually gone

After you restart your computer, you can verify that Java has been removed. On Windows, open Settings > Apps > Apps and Features again and search for "Java" — nothing should appear. On Mac, open Finder, click Applications, and look for any Java folders or applications — the list should be empty.

You can also check from the command line if you are comfortable with that. On Windows, open Command Prompt and type java -version, then press Enter. On Mac, open Terminal and type the same command. If Java is removed, you will see an error saying the command was not found. If Java is still there, you will see a version number.

Frequently Asked Questions

Is Java the same as JavaScript?

No. JavaScript is code that runs inside your web browser and cannot be removed. Java is a separate program that sits on your computer. You can remove Java without affecting JavaScript or your browser.

Will removing Java break my browser or websites?

No. Modern websites use JavaScript, not Java. Removing Java will not affect your ability to browse the web. If a website tells you that you need Java, that website is outdated and you should contact the website owner to report the problem.

Can I remove Java and then reinstall it later?

Yes. Java is free to read and reinstall from Oracle's website at any time. If you remove it and then find out you need it, you can read it again in a few minutes.

Do I need to remove Java if I am not using it?

No, you do not have to. Java updates come through your regular system updates now, so it does not require extra maintenance. Remove it only if you want to free up disk space or reduce the number of programs on your computer.

What if I see multiple Java versions in my Apps list?

Remove all of them. You only need Java if you use a program that specifically requires it. If you have multiple versions, uninstall each one separately using the same steps.