JNLP Converter

Extract text from JNLP files

Select File
Drop or upload your .JNLP file

Online File Converter

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How to extract text from your JNLP file

Click the "Select File" button above, and choose your JNLP file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.

Convert JNLP to another file type

To convert your JNLP file to another format, you need OpenWebStart or other Web software.

Convert a file to JNLP

To convert other file formats to the "Deployment Descriptor" file type, you need software like OpenWebStart or a similar tool.

About JNLP files

A .JNLP (Java Network Launching Protocol) file is not a standalone application but an XML-based instruction file used by Java Web Start to launch Java programs over the internet. Instead of containing binary code, it acts as a "smart shortcut," telling your computer where to download the actual application code (JAR files) and which security permissions to request.

Users commonly have issues with this format because Java Web Start was deprecated in Java 11, and modern web browsers (like Chrome and Edge) no longer execute these files automatically - they simply download the XML text to your disk. This leaves users staring at a file that asks "How do you want to open this?" instead of launching the software. Furthermore, without the correct legacy Java Runtime Environment (JRE) installed, the file is useless.

While you cannot directly "convert" a JNLP into a standalone EXE (since the actual program code resides on a remote server), you can convert the file for inspection and troubleshooting:

For Inspection: Convert to TXT or XML to view the codebase URL, identifying where the actual software is hosted or debugging connection errors.
For Documentation: Convert to PDF to archive the launch configuration and security signatures for compliance.
To Run: The only way to "execute" the file on modern systems is to install OpenWebStart, which mimics the deprecated Java functionality.

Convert.Guru analyzes your JNLP file, detects the exact format, and lets you read the text inside.

Users also converted PDF, JNLPX, JNL, FRMSERVLET, JPG, RPF, PNG, CRDOWNLOAD, ZIP, UDF, METADATA, ENC and ASPX files.

FAQ

If you want to convert JNLP file to PDF, JAR, EXE, HTML, HTM, CSS, JS, PHP, ASP, ASPX, JSP or JSPX, you can use OpenWebStart or similar software from the "Java Application Launcher" category. In the File menu, look for Save As… or Export….

To convert RSS, CSS, CGI, SITEMAP, PL, WEBMANIFEST, JSON, JS, XML, HTML, ICO or HTM files to JNLP, try OpenWebStart or another comparable tool in the "Java Application Launcher" category.

The JNLP Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our JNLP converter.