NASL Converter

Extract text from Nessus scripts (NASL)


Drop or upload your .NASL file
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How to extract text from your NASL file

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

Convert NASL to another file type

To convert NASL scripts to another format, you need Nessus or other Developer software.

Convert a file to NASL

To convert other file formats to the "Security Script" file type, you need software like Nessus or a similar tool.


About NASL files

The .NASL file extension stands for Nessus Attack Scripting Language. It is a specialized plaintext scripting file used by the Nessus vulnerability scanner, developed by Tenable. Cybersecurity professionals use these scripts to write and execute custom vulnerability checks against target networks and systems. Each .NASL file contains code that dictates how Nessus should interact with network services, look for known security flaws, and report potential risks. To natively open and execute a .NASL file, you need a running instance of the Nessus vulnerability scanner engine. Because the file contains plaintext source code, you can view and edit the raw code using any standard text editor like Notepad++ or Visual Studio Code. However, the syntax is highly proprietary. A major disadvantage of this format is that non-technical stakeholders cannot read or execute the code safely, making collaboration difficult without converting the file into a more accessible document format. Executing the script outside of the Nessus engine is virtually impossible. If you need to share the script contents with non-developers or include the logic in a compliance report, converting the .NASL file is highly recommended. The best target formats are standard text documents like TXT, PDF, or HTML. Converting to PDF ensures the script formatting remains locked and is easy to read on any device without requiring a dedicated code editor. Note that converting the file to a document format means it will lose its executability within the Nessus environment. Standard online converters often fail to process .NASL files because they do not recognize the proprietary extension and assume it is an unsupported binary. This is a highly specialized developer format. Just drag and drop your file into convert.guru to identify the format, view the internal text content, and convert it when possible to standard formats for easier sharing and reporting.

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

Users also converted NESSUS, NBE and NSR files.


FAQ

If you want to convert NASL file to , you can use Nessus or similar software from the "Vulnerability Scanning Script" category. In the File menu, look for Save As… or Export….

To convert files to NASL, try Nessus or another comparable tool in the "Vulnerability Scanning Script" category.



The NASL 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 NASL converter.