Can I send a fax for free?

Truly free services usually add ads to your cover page or limit you to 1-2 pages per day. For professional use, utilize a free trial from Fax.Plus or the pay-as-you-go model from Phaxio.

Yes, mFax.to utilizes standard encryption protocols (TLS) for transmission, making it significantly more secure than a traditional fax machine or unencrypted email.

Do I need a phone line?

No. These are 100% cloud-based. You send via a web browser, mobile app, or email client. The provider manages the phone lines on their server.

How does 'Email-to-Fax' work?

You simply compose an email. In the 'To' field, you type the recipient's fax number followed by the provider's domain (e.g., 12125551234@efaxsend.com), attach your PDF, and hit send. The service converts it to a fax.

The 7 Best Online Fax Services in 2025: Security, Speed & Cost Compared

We tested the top online fax providers for 2025. From the mobile-first simplicity of mFax.to to the enterprise power of RingCentral and eFax, here is what you need to know about HIPAA compliance, API reliability, and hidden pricing.