FaxZero is a free internet (online) fax service which allows you to send fax for free to anywhere in the U.S. and Canada, including Puerto Rico. You don’t need a fax machine to this Web to Fax. You can send a PDF (.pdf), Microsoft Word (.doc) file, or Excel spreadsheet (.xls) as fax or just type or paste the text of your fax into to the text box provided.
I did a test fax to a test fax number I have, I got the fax in few minutes and the page looked pretty nice.
After you have entered valid email address and other mandatory fields at FaxZero.com, click “Send fax now” button. Your fax will be queued at this point. You will receive a confirmation message in your e-mail box; click the URL in that e-mail message, to send fax from the queue. Note: Your fax won’t be delivered until you click the URL in that e-mail message.
You will receive an e-mail message once it has been successfully delivered (or failed.)
Basically free FaxZero will have ad or logo on the cover page (not in the actual fax pages) and have a limitation of maximum 2 free faxes per day and maximum of 3 pages in a fax. You can use Premium Fax option ($1.99 each) if you don’t want ads or the limitations.