Question 1

Is this a Java decompiler online tool?

Accepted Answer

Yes. It decompiles Java bytecode from JAR files in an in-browser workflow, with no local installation required.

Question 2

How do I decompile a JAR file online?

Accepted Answer

Upload your .jar file, wait for decompilation to complete, then download the generated source ZIP.

Question 3

What do I get as output?

Accepted Answer

You get a ZIP archive containing decompiled Java sources organized by package.

Question 4

Do I need to install anything?

Accepted Answer

No. This is an online JAR decompiler that runs in your browser.

Question 5

Does it work with large or obfuscated JARs?

Accepted Answer

Large archives can take longer and may hit free-tier limits. Obfuscated bytecode may still decompile, but output can be harder to read.

Question 6

Can I decompile a single .class file instead?

Accepted Answer

Yes. Use the Class Decompiler tool for one-off class files.

Java Decompiler Online for JAR Files

How to decompile Java JAR files online