The operating systems listed here have been tested with Neevia PDFsign/encrypt and are officially supported:
- Windows Server 2019 64-bit edition
- Windows Server 2016 64-bit edition
- Windows 10 32-bit and 64-bit editions
- Windows 8 32-bit and 64-bit editions
- Windows Server 2012 32-bit and 64-bit editions
- Windows 7 32-bit and 64-bit editions
- Windows Server 2008 32-bit and 64-bit editions
- Windows Vista 32-bit and 64-bit editions
- Windows Server 2003 32-bit Web Edition, Standard Edition and Enterprise Edition
- Windows Server 2003 x64 Web Edition, Standard Edition and Enterprise Edition
- Windows XP Professional and Home Edition with Service Pack 1, 2 or 3
- Windows XP x64 Professional with Service Pack 2 or 3
- Windows 2000 Professional, Server and Advanced Server