Many online faxing services now exist, making it convenient and easy to send faxes without a fax machine , which will be very useful especially for people that not have a fax machine at home or who a part of an office that shares a common fax machine, you'll know exactly how tough it can be to stay productive when you have to wait for your turn to use the machine and try to send a fax for an hour or so when the number is busy.
Online faxing is still a reliable source of sending documents (doc, pdf, txt, or pic …), without spending additional money .

Here are the most ways to send a free fax online to International destinations.

Send free faxing to Worldwide

Send free fax to USA
Send faxes to anywhere in the US

How to Send Free Fax Mobile Phone
Send free fax from your Smartphone

Send a Fax from Mobile Device Using Email account

** Some services allow you to receive faxes as well, and will provide you with a virtual fax number that people can send faxes to. These services vary in price. Some of this service requires your email ID for security and reliability purpose. Beware some of the online faxing service will also shows advertisements, if your documents needs to be ad free then decide the proper service to send your fax online.