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JavaScript Security

Nitro PDF Pro for Windows

It is possible to obtain a PDF document containing embedded JavaScript that can trigger security vulnerabilities. Some users may wish to disable JavaScript for security reasons, or system administrators might need to disable JavaScript to abide by their company’s IT policy.

Note: By default, JavaScript is enabled, and the setting is visible in Preferences. 

To disable JavaScript from running:

Option 1:

  1. Click on the File menu button, and then Preferences
  2. In the Preferences dialog, click JavaScript
  3. Select Disable JavaScript
  4. Click Apply

disable javascript option 1

Option 2:

Note: This option is only available for Administrators  

  1. Launch the Registry Editor 

  2. Go to Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Nitro\PDF Pro\CV\settings 

  3. Right-click in the right area of the window and select "New"->"String Value" 

    disable javascript option 2

  4. Name the new value javascript_force_disabled

  5. Set its value to /b 1 

    Note: To enable JavaScript set its value to /b 0 

  6. Relaunch Nitro PDF Pro

  7. Click on the File menu button, and then Preferences

  8. The JavaScript tab is no longer visible to users in your organization

 

Last updated: June 2026