In 2025, "free" usually means a one-time credit (10 pages) or a time-limited trial. Only services like FaxZero are "forever free" but they put ads on your documents.

Do I need a credit card for a free trial?

For professional services like mFax and eFax, yes. For "quick" tools like Fax.Plus (10 pages) or FaxZero, no credit card is required.

Which is the most secure?

mFax is the industry leader for security, offering SOC 2 Type 2 and HIPAA compliance, which is essential for legal or medical documents.

Faxing in 2025: The 6 Best Free Services That Actually Work (Fact-Checked)

Stop searching for a fax machine. We fact-checked the top 6 services of 2025 to find out which are actually free, which are secure, and which are just ad traps.