By Alexey Spasskiy · Published March 28, 2026 · Updated April 3, 2026 · 8 min read
Quick answer: To receive faxes online, sign up for an online fax service (like mFax.to), get a virtual fax number, and point incoming faxes to your email. No machine, no phone line, no paper.
Hospitals, courts, insurance companies, and government agencies still send millions of faxes every day. If you need to receive them, you don't need to buy a $300 fax machine or pay for a dedicated phone line. You need a virtual fax number — and you can have one set up in under five minutes.
This complete guide covers every method to receive faxes online, how to choose the right service, what to look for if you need HIPAA compliance, and how the costs compare.
One Key Advantage Over a Fax Machine
A physical fax machine can only receive one fax at a time. Everything else gets a busy signal. A virtual fax number handles unlimited simultaneous incoming faxes — zero busy signals, no missed documents.
How Receiving a Fax Online Works
When someone faxes your virtual number, here's what happens behind the scenes:
- The sender dials your number on their regular fax machine — they don't change anything on their end.
- Cloud servers answer the call and perform the standard fax handshake signal.
- The document is digitized — the service captures every page and converts it to a PDF.
- You receive the PDF via email, app notification, or both — typically within seconds.
The sender has no idea they're faxing a cloud server. To them, it's a normal fax number.
4 Ways to Receive Faxes Online
Mobile App
Use an app like mFax.to on your iPhone or Android. Incoming faxes push-notify you and open as PDFs in the app.
- Works anywhere
- Instant push notifications
- Send and receive from same account
- Requires app download
Fax-to-Email
Your virtual number routes incoming faxes to one or more email addresses as PDF attachments. Works with Gmail, Outlook, or any inbox.
- No extra software
- Multiple recipients
- Works with any email client
- PDF quality depends on sender's machine
Web Dashboard
Log in to your service's browser portal to view, download, forward, or archive every received fax. Shared access for the whole team.
- Full searchable history
- Team access control
- No email required
- Requires logging in manually
Fax Machine (Traditional)
Dedicated phone line connected to a physical machine. Receives faxes as printed paper. Still common in healthcare and legal offices.
- No software setup
- Universally compatible
- Requires hardware, phone line, and paper — can miss faxes when busy
For most individuals and small businesses, the mobile app + fax-to-email combination is the clear winner: you get push notifications on your phone and a PDF in your inbox, with no hardware involved.
Step-by-Step: Set Up Online Fax Receiving in 5 Minutes
Choose an Online Fax Service
Pick a service based on your volume and compliance needs (see comparison below). mFax.to works well for both individuals and business teams — HIPAA-ready on all plans, no setup fee, and a 14-day free trial.
Create Your Account
Sign up with your email address. No credit card required to start the trial. Most services take under 2 minutes to register.
Choose Your Fax Number
Pick a local number (matching your area code — builds trust with local clients), a toll-free number (nationwide professional image), or an international number if you receive faxes from overseas. Most services let you port an existing number if you're migrating from a physical machine.
Configure Your Delivery Email
Enter the email address (or multiple) where faxes should land. Every incoming fax triggers an immediate email with the PDF attached. Add a shared team inbox here if multiple people need to see incoming faxes.
Share Your Number and Receive
Add your new fax number to your email signature, website, patient intake forms, or business cards. You're done — faxes start arriving as PDFs the moment someone sends to that number.
Porting an Existing Number
Switching from a physical machine? You don't have to change your published fax number. Most services support number porting — the process typically takes 7–14 business days. Senders keep dialing the same number, and faxes route to your new digital inbox automatically.
Service Comparison: Top Options for Receiving Faxes Online
| Service | Starting Price | Pages/Month | HIPAA | Free Trial |
|---|---|---|---|---|
| mFax.to | ~$12/mo | 250+ | Yes (all plans) | 14 days |
| Fax.Plus | $8.99/mo | 200 | Yes (all plans) | 10 free pages |
| eFax | $18.99/mo | 340 | Corporate only | 7 days |
| RingCentral Fax | $17.99/mo | 1,500 | Yes | Yes |
| SRFax | $11.45/mo | 200 | Healthcare plans | No |
| Nextiva | $7.95/mo | 500 | Dedicated plan | Yes |
| iFax | $19.99/mo | 200 | Professional plan | 5 pages free |
| Dropbox Fax | $9.99/mo | 300 | No | 5 pages free |
A few things to note when comparing:
- eFax has a $10 setup fee and HIPAA compliance only on its most expensive (Corporate) tier — watch for that if you're in healthcare.
- mFax Business is the best-value option if you need HIPAA on a sub-$30/month plan with team accounts included.
- Nextiva at $7.95/month is the lowest entry price, but dedicated HIPAA plans cost more.
For a deeper dive, see our guide to the best business fax services.
What Format Do You Receive Faxes In?
PDF is the standard across all major online fax services. When someone faxes you a document, the cloud server converts the analog signal to a high-resolution PDF and delivers it to your configured email and/or app.
Some services also deliver faxes as TIFF (Tagged Image File Format) — a lossless format sometimes preferred in medical imaging workflows.
On premium tiers (iFax Professional, some mFax plans), incoming faxes are OCR-processed — the PDF becomes searchable and copy-pasteable text, not just a scanned image.
Free Options: What's Actually Available
True "free forever" online fax receiving is rare. Here's what you can realistically get for free:
| Option | What's Free | Limitation |
|---|---|---|
| FaxBurner | Receive up to 25 pages/month | Temporary number, not permanent |
| Fax.Plus | 10 pages (one-time) | No ongoing free receiving |
| iFax | 5 pages (one-time) | Trial only |
| Doximity DocFax | Fully free | Healthcare/clinicians only |
| GotFreeFax / FaxZero | Send only | Cannot receive |
The bottom line: if you need a permanent, dedicated number for receiving faxes reliably, you need a paid plan. Entry-level plans start around $7–12/month — far cheaper than a phone line + machine ($40–80/month combined).
Temporary Numbers Aren't Reliable
Free tiers that give you a temporary number are fine for a one-time test. But if a healthcare provider, court, or employer has your fax number on file, a temporary number will expire and you'll miss critical documents. Always use a permanent number for ongoing use.
Security: Is Receiving Faxes Online Safe?
Online fax is actually more secure than traditional fax in most scenarios:
| Factor | Online Fax | Traditional Fax |
|---|---|---|
| Transmission security | TLS/SSL encryption in transit | Unencrypted analog phone lines |
| Storage security | 256-bit AES encryption at rest | Paper in an unsecured tray |
| Access control | Password-protected, user-level permissions | Anyone near the machine sees it |
| Audit trail | Timestamped delivery logs | None |
| HIPAA compliance | Available on select services | Not inherently compliant |
Traditional fax machines print documents into an unguarded output tray — anyone walking by can read them. An online fax service encrypts documents in transit and at rest, and only delivers them to authenticated email inboxes.
HIPAA Compliance for Receiving Faxes
If you're in healthcare, receiving faxes online can be HIPAA-compliant — but the service must meet specific requirements:
- End-to-end encryption (256-bit AES at rest, TLS in transit)
- Business Associate Agreement (BAA) signed with the provider
- Audit logs tracking who accessed which fax and when
- Access controls preventing unauthorized viewing
Services that are HIPAA-compliant on standard plans: mFax.to, Fax.Plus, SRFax (healthcare plans), WestFax, iFax (Professional).
eFax is only HIPAA-compliant on its Corporate plan — not the standard Plus or Pro tiers.
For a full breakdown, see our HIPAA fax compliance guide.
Online Fax vs. Traditional Fax Machine
| Factor | Online Fax | Fax Machine |
|---|---|---|
| Hardware cost | $0 | $100–$500+ |
| Monthly cost | $7–$30/month | $20–$60/month (phone line) + paper/ink |
| Phone line | Not required | Required (dedicated analog line) |
| Setup time | Under 5 minutes | Hours |
| Access | Any device, anywhere | Fixed physical location |
| Document format | Digital PDF, cloud-stored | Printed paper |
| Busy signals | Never — unlimited simultaneous | One at a time |
| Missed faxes | Never (always-on servers) | Paper jams, busy line, power loss |
| HIPAA available | Yes (select services) | Not inherently |
The math is straightforward: online fax is cheaper, more accessible, more secure, and never misses a document.
Send and Receive with the Same Account
One often-overlooked benefit: the same mFax.to account handles both directions. You get a virtual number for receiving, and you can send faxes directly from your phone or browser without any additional setup.
For sending guides, see:
Frequently Asked Questions
Can multiple people receive the same incoming fax?
Yes. Most services let you configure 2–10 email addresses per account, so everyone on the team gets a copy simultaneously. On mFax Business, you can also set role-based access so only certain users see certain fax lines.
Do I need to be online to receive faxes?
No. The service's servers are always on and receive faxes 24/7. Whether your phone is off, your laptop is closed, or you're on a flight — the PDF waits for you in your email when you reconnect.
Can international senders fax my virtual number?
Yes, with standard international dialing. If you receive frequent faxes from a specific country, some services let you get a local number in that country (e.g., a +44 UK number) so overseas senders don't pay international rates.
What if the sender's machine is old or low quality?
The fax protocol handles that. The PDF you receive will reflect the quality of the original document and the sender's machine resolution. Most services accept the full range of fax resolution standards (standard, fine, and superfine).
Start Receiving Faxes Online Today
You don't need a machine, a phone line, or a technician. Download the mFax app or sign up at mFax.to, pick a number, and you're receiving faxes as PDFs within minutes. Over 5 million users have already made the switch — the fax machine is optional.
For more on virtual fax numbers, see our complete virtual fax number guide.