You may also use the Export PDF service in Adobe Acrobat Reader application (both desktop and mobile).
Refer this help document Using Adobe Export PDF for more details on this.
If you have not installed Adobe Acrobat Reader on your machine, you can install the latest version from here Adobe - Adobe Acrobat Reader DC Distribution.
On the mobile device, you can install the application from the Google Play store on Android and App Store in iOS devices.
Let us know if you have any questions.