is a JAR search engine that helps Java developers to find JAR libraries containing required Java classes.

Simply enter the name of the class or the JAR file you are looking for and start your search. can be used to easily resolve NoClassDefFoundError and ClassNotFoundException problems.

Our continuously growing database currently holds more than 604,772,467 classes from over 3,115,562 JAR files. If you think that an important JAR file is missing in our index, please get in touch with us. Also for all other questions and comments please use our contact form to get in touch with us.