Windows has a Fax application but you need to be connected to a phone line. Yes, this means you will need a dial-up fax modem.
Obviously, all of the above is not very practical, especially if you send several pages a day. Below we will see how you can use online fax services to send and receive documents for free.
Initially you should consider what kind of user you are, how often you will need to use the service and what features you need.
If you just want to send a few pages read below. The services allow you to send free 50 to 10 pages per month or two pages a day, without having to pay. Perhaps the ten pages do not sound a lot, but there are some who do not send them in a year. If you need to send more pages per month, you will have to pay.
GotFreeFax (2 pages per day)
FaxBetter Free (50 pages per month)
eFax Free (up to 10 incoming in the month you are delivered via email)
PamFax (3 pages are free and support Dropbox, Box.net and Google Documents as built-in service. Available online for Windows, Mac OS X, iPhone / iPad, Android and Blackberry 10 devices.)
MyFax Free (2 documents every 24 hours)
You will need to confirm your e-mail address to send the free fax.
Receiving a fax
If you need to receive an online fax, you will need to subscribe to a paid service. This service will create a dedicated phone number for the fax line and it will cost you money. There are many services that will do this, such as those mentioned above, but not in the free package, except for efax.com that allows you to download 10 fax per month.
But if you are not the type who sits all day and receives faxes, you can try services free of charge for 30 days. OR RingCentral Let's say it is a fairly reliable company (partly owned by Cisco and AT&T) offering 30 days free shipping and faxing.
There are many services you can use to send a fax occasionally. You can do it for free, but if you want to receive a fax, you will have to sign up for a test account, which you can cancel at any time.