: Open an XPS file in the built-in Windows XPS Viewer , select "Print," and choose Microsoft Print to PDF as the destination.

: Capable of creating PDF/A documents, which are standardized for long-term archiving.

: Upload the XPS file to Google Drive, open the preview, and use the print function to "Save as PDF".

If you prefer not to use third-party software with serial keys, several native and free alternatives exist: