Tips to open JNLP file
Can't open the JNLP file? You are not the only one. Thousands of users face similar problems every day. Below you will find tips on how to open JNLP files as well as a list of programs that support JNLP files.
JNLP file extension
| File Name |
Java Web Start Format |
| File Developer |
Oracle |
| File Category |
Web Files |
The JNLP file is supported on 3 operating systems. Depending on your operating system, you may need different software to handle the JNLP files. Below is a summary of the number of programs that support and open the JNLP file on each system platform.
What is JNLP file?
The .JNLP file is the calling file. It is written in the Java Network Launching Protocol standard and contains the information necessary to execute remotely a JAVA program. Commonly used to run programs in the browser as applets. The file itself is text and based on XML syntax. A JAVA runtime (JRE) is needed to execute the file. Additionally, the user must have access to the resource containing the appropriate executable file to run the program.
How to open JNLP file?
An often recurring problem with Java Web Start Format is that JNLP is not associated with the correct program file. This causes the file JNLP to open by system applications not designed for this purpose, or to display a message that there is no associated program. How to solve such a problem?
The first thing you should do is just "doubleclick" on the JNLP file icon you want to open. If the operating system has an appropriate application to support it and there is also an association between the file and the program, the file should be opened.
Step 1. Install Java Web Start
In this case, you should first verify that the Java Web Start application is installed on the computer. To do this, enter the name Java Web Start into the system search engine. If it is not, installation may solve the problem, as most applications create file associations during installation. Later in this article you will find a list of programs that can open JNLP files.
Programs to open JNLP file
Remember to download programs supporting JNLP files only from verified and safe sources. We suggest using the websites of software developers.
Step 2. Create association of Java Web Start with JNLP files
If the application is or has been freshly installed, but the JNLP file still does not use the Java Web Start program, it means no association. It is most convenient to call the context menu with the right mouse button and select Properties. Information about the file and the program that the file is associated with are available here. Using the "Change" button we can set the program to handle this type. The program should be visible in the window, otherwise it should be selected manually using the "Browse" button and the program installation directory should be indicated. Checking the "Always use the selected program ..." box will permanently associate the JNLP file with the Java Web Start program.
Step 3. Update Java Web Start to the latest version
If, however, after binding Java Web Start with Java Web Start Format there were still problems, you should update the program to the latest version. Some applications allow you to update from the program level, and for others you need to download the installer from the Oracle Corporation page and install.
Step 4. Check for the following problems with the JNLP file
The problem may also be with the file itself if the above steps don't work. File problems can be divided into the following:
Very often, the file may be size 0 or incomplete. This is most often caused by a problem while downloading the JNLP file. The only repair option is to download the file again.
The most common cause here is computer viruses. A virus scan using an up-to-date antivirus program should fix the problem. Alternatively, you can use the scanners available online. However, it is important to scan the entire system, not only the file JNLP or the program directory. As a result of the scan, sometimes it is not possible to recover JNLP files, which are deleted if there is a backup of this file, then after restoring it, it must also be scanned.
This can happen especially when the program is dynamically developed and the structure of the JNLP files changes over time. These problems are known and are often very easy to fix using the software developers's website.
The file may be corrupted in a number of ways. The repair method must be adapted to the type of file and damage. Some programs offer the option of recovering data from damaged JNLP files. The easiest way to restore the file is from a backup or by contacting Oracle, but this one can be expensive. Not all damage can be reversed.
The program indicates that the file is encrypted or corrupted. The encrypted file JNLP except for the special designation, works normally, but only on the device where it was encrypted, before transferring it to another machine, decryption is required.
Some of the system directories are excluded from modification. The problem is only writing to the file, not reading it. It is best to move JNLP to a different directory.
This problem only occurs with more complex files. You may find that another program you are using is preventing you from working with the file. Closing other programs should help. Sometimes you have to wait for the session to the file JNLP to close. Some anti-virus or backup software may occupy the JNLP file for a certain period of time. If nothing helps, please reset the device.
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