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What are JNLP files and how to open them

Are you having problems opening a JNLP file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a JNLP file?

A .JNLP file is a Java Network Launching Protocol for Java Web Start file.

JNLP is an acronym for Java Network Launching Protocol. Java is a programming language that uses the JNLP file format to launch and manage various Java applications over a network or the Internet. The JNLP files are saved in the XML file format and contain information about an application written in Java, e.g., where to download it and how to launch it.

Unlike typical web applets, JNLP files are not run within a user's Web browser. These files are actually downloaded onto a user's computer and are then run as regular Java applications. The files are used only for stand-alone applications.

How to open JNLP files

Important: Different programs may use files with the JNLP file extension for different purposes, so unless you are sure which format your JNLP file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested ten different JNLP openers which you will find listed below.

Last updated: March 26, 2023

Various apps that use files with this extension

These apps are known to open certain types of JNLP files. Remember, different programs may use JNLP files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Java Platform SEJava Platform SEVerified
Java Web StartJava Web StartUser submitted
Kies Air Discovery ServiceKies Air Discovery ServiceUser submitted
PowerTeacher GradebookPowerTeacher GradebookUser submitted
JNLPJNLPUser submitted
AppletAppletUser submitted
IBM Java Web StartIBM Java Web StartUser submitted
Cognitive TutorCognitive TutorUser submitted
ClosetMaidClosetMaidUser submitted
Progress BarProgress BarUser submitted

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about JNLP file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.