Some services, such as Biscom 1-2-3, HelloFax, Fax.Plus, and eFax, include tools for creating and applying digital signatures either via their web interfaces, desktop apps, or mobile apps. The majority of the services we tested allow you to preview attachments before you send them. In terms of attachments (all of which are sent as images), all the fax services we tested support a generous range of file types, though the file size limit varies. You can also include a cover page with your fax in most cases. Most fax services provide an online address book, too, which makes it much easier to send faxes to the same contact in the future. Sending a fax from an online portal is usually simple: All you need to do is enter a telephone number. Biscom 1-2-3's interface is notably bad, since you can't actually send or receive faxes from it. Still, while these interfaces may be nonintuitive, they do send faxes reliably. eFax, MetroFax, and MyFax have identical interfaces that look like webmail inboxes from decades ago. HelloFax and mFax lead the pack when it comes to having well-designed and highly functional web interfaces that don't inhibit your workflow. If you use a service frequently, you want one that doesn't cause unnecessary friction. Well-designed software can inspire user confidence, while archaic services can just as easily undermine it. Fax From the WebĪll the fax services we tested offer a web interface, but their utility varies wildly.

Faxing is still a pain, but these services help modernize the experience. These services provide a fax number you can use to send or receive faxes through a web portal, by email, or even via mobile and desktop apps. Although all-in-one printers have largely replaced standalone fax machines, online fax services let you break free from the machine altogether.

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