FaxZero gives you two free faxes a day. That’s probably what most people need. You need a soft copy of your document in PDF, Docx (Word2007) or Doc (previous versions of Word) saved somewhere in your computer. Simply provide the fax number and company information, and send the file just like sending an email. You will then receive a fax confirmation in your email inbox within minutes whether the fax was successfully sent. Currently faxzero is only available in sending faxes to Canada and Us. There is also an option to pay $1.99 through paypal if you want to send a prioritized fax instantly.
MyFax – If you need to send a fax to countries outside North America then MyFax will send one free fax for you to 41 different countries. Just like Faxzero, you will also get a confirmation email in your inbox once it’s done. My fax also offers a plan of $10/month for 100 faxes.
GotFreeFax.com also allows user to send free fax online to the US and Canada. User can either upload a PDF/Word file or enter text to fax. Plus, it does NOT add Ads to user’s fax and is suitable for faxing formal documents.