Though some people think that fax is in the past, it is not quite true. A lot of people and official organization use faxes as primary way of communication. When you use a fax not very often, there is no sense to buy fax machine or pay permanently for online services while you can use internet faxes for free. You can not only got free fax number and receive fax messages to it on email but you can send faxes as emails or using online forms as well.

Update New online free fax services added, dead ones replaced.

Send free faxes online

Faxzero
With this online app you can send internet faxes for free to anywhere in U.S. and Canada, You can submit Doc or Pdf file or paste plain text in online form. The drawback of this app is ad on the cover page and limits of maximum 3 pages per one fax document, maximum 2 faxes per day. You have to input valid email address because you need to confirm fax sending before it actually faxed out. In general it takes no more than 10 minutes to send a fax.

MyFax
MyFax Free lets you send a fax for free online to 41 countries including the US, Canada, most of Europe, China, Japan, and South Korea. The file must not exceed 10MB in size and contain a maximum of 10 pages. Supported files types include Microsoft Word, Excel, PowerPoint, PDF, TIF, GIF, JPEG, etc.

GotFreeFax.com lets user send free fax online to the US and Canada without ads added to cover page. You can either use its online rich text editor or upload a PDF/Word file to fax. Free service is limited to 3 pages per fax and 2 faxes per day.

freeFAX.com is powered by the international tpc network which is a collection of fax servers in many locations around the world. Each fax that you send from freeFAX is routed through the tpc service and directed to the closest fax server to the recipient.

Receive free faxes online
K7.net
After simple registration on this amazing service you get a free phone number which enables you to have your faxes delivered directly to your email as multipage Tiff file. To look through pages you should use Shift+PageUp and Shift+PageDown in various image browsers. You also have the option to view faxes right on the K7 Web site.