• If you are citizen of an European Union member nation, you may not use this service unless you are at least 16 years old.

  • Work with all your cloud files (Drive, Dropbox, and Slack and Gmail attachments) and documents (Google Docs, Sheets, and Notion) in one place. Try Dokkio (from the makers of PBworks) for free. Now available on the web, Mac, Windows, and as a Chrome extension!



What's an EFX file and how do I open one?

Notes from ClifNotes, Mar 2008, permalink Web Service


Has anyone ever forwarded an eFax to you before? What you'd see is that they've sent you a .efx file that you have no clue how to open. I've only seen this happen a few times, but here's what the deal is.


eFax is a sometimes free service at efax.com which allows you to receive a fax from people even if you don't have your own fax machine. They supply you with a phone number and all you have to do is give them your email address. If someone sends a fax to your eFax phone number, you'll get an email from eFax with an attached .EFX file.


The EFX file is sort of like a specially encoded TIFF file. Most people can't view this file without an eFax viewer. If you search for an eFax viewer online, you'll generally end up at the eFax website and downloading a tool called the eFax Messenger.


I used eFax years ago when it was a new service. I still have a copy of one of their first eFax viewers here and it works just fine on most PCs.

However, because of licensing and legal issues, I can not offer it to you. You can still download a free viewer from eFax.


Download the viewer here



Here's a tip for existing eFax users. Don't forward your eFax files to folks and expect them to know how to open them for viewing. All the eFax viewers I've ever used allow you to save your eFax as another more common file type. Just look through the menus while you have an eFax open and you'll soon see how to save it as a TIFF or maybe even a PDF file.


By the way folks, I still recommend their free service despite their choice of a proprietary format for sending you a fax. If you seriously need to receive a fax at home and you can't afford a real fax machine, this will do the trick nicely. Please be aware that you can't send a fax from your PC unless you pay them a little money for a premium account. Even if that's so, I'm sure it's well worth a few bucks if you're a business person on the go and you can't drag a big fax machine with you everywhere.


Quote from the website

eFax is an online fax service that eliminates the need for a fax machine, an extra fax line and all the associated expenses (paper, ink cartridges etc.). Get a real fax number that's tied to your email. Send and receive faxes as email attachments. It's all the reliability and security of faxing with the ease and convenience of email.




Other free email/fax services