File Extension JNLP

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File Extension JNLP

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JNLP is short for Java Network Launching Protocol. This format is used by Java to download and launch applications over the network. JNLP applications typically don't run from user internet browser. Instead they are downloaded by Java and executed as a separate process.

A properly configured browser passes JNLP files to a Java Runtime Environment (JRE) which in turn downloads the application onto the user's machine and starts executing it.

JNLP is an XML file which contains URL for JAR with Java application and also name of the initial class to run (which is usually enough to launch Java application). Since XML is a text format you can view and edit JNLP files using notepad if necessary.

JNLP works in a similar fashion to how HTTP/HTML works for the web. For rendering a HTML webpage, after the user clicks on a weblink, the browser submits a URL to a webserver, which replies with an HTML file. The browser then requests the resources referred to by this file (images, css), and finally renders the page once it has received enough information. Page rendering usually starts before all resources have downloaded; some resources not critical to the layout of the page (such as images), can follow on afterwards.

Similar file extensions

    • File Extension JAR - Java archive
    • File Extension Class - Java class

If you are not able to open file with certain file extension make sure to check if extension for the file is correct. It is possible that information in the file doesn't match file extension.


More Information on File Extension JNLP:
File Extension JNLP - Information about File Extension JNLP
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Dangerous Extensions - Protect you computer from viruses - dangerous file extensions
What are file extensions? - Read more about file extensions

Extension Details
  Video Information
  video/dvd   video/mpeg
Opens with
  VLC media player
  Media Player Classic
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File extension JNLP

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