You don't need a fax machine or phone line to send a fax. The best online fax services allow you to send and receive faxes via your email address, a mobile app, or a web portal—and sometimes for free.

Have you ever found yourself needing to send a fax, but couldn’t do so because you don’t own a fax machine, don’t have a phone/modem line, or don’t want to pay the high fees associated with sending ...