Guide

How does online fax work?

Send a fax without your own fax machine, simple, digital and from anywhere. This is how modern faxing over the internet works.

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Quick answer

Online faxing works by sending your digital document over the internet to a fax server, which then transmits it to the recipient's fax machine. You do not need your own fax machine, just a smartphone, tablet or computer with internet access. With FaxMonkey you simply upload your document, enter the fax number and pay, done.

How it works - step by step

Your online fax in just 3 steps

1

Upload document

Upload your document as a PDF, JPG, PNG or Word file. All common formats are supported, directly from your smartphone, tablet or computer.

2

Enter fax number

Enter the full recipient fax number with country code (e.g. +49 for Germany). Our system automatically checks the correct format.

3

Pay and send

Pay securely via Stripe and click 'Send fax'. You will receive an immediate confirmation by email.

What you need

Internet connection

Stable internet via Wi-Fi or mobile network (3G/4G/5G) on your device

Digital document

Your document as a PDF, JPG, PNG, TIFF or Word file

Recipient fax number

The full recipient fax number with country code

Your benefits

No fax machine needed

Save the cost and maintenance of a fax machine. Fax directly from your smartphone, tablet or computer.

Available anytime

Send faxes around the clock, 7 days a week, regardless of office hours or location.

Secure and GDPR-compliant

Encrypted transmission, automatic deletion. Your documents are deleted after delivery.

Legally valid transmission report

You will receive proof of successful delivery by email, important for cancellations, deadlines and legal documents.

Tips

  • Save your document as a PDF for optimal transmission quality and readability
  • Double-check the fax number for typos, charges for wrong numbers cannot be refunded
  • Use high-contrast documents with black text on a white background

Important to know

  • Online faxes can only be sent to real fax machines, not to regular phone numbers
  • The recipient's fax machine must be switched on and ready to receive for successful delivery

Send a fax without owning a fax machine? What used to be unthinkable is now everyday. Online faxing makes it possible to send documents digitally while they still arrive as a classic fax at the recipient. We explain how this works technically and why fax is still relevant today.

Whether you want to send a cancellation to your insurer, a signed contract to your lawyer or a medical certificate to your employer, with online fax you can do it in a few minutes without owning a fax machine.

How does online fax work technically?

Online fax combines the advantages of the digital world with proven fax technology. The process works like this:

  • 1. Upload: You upload your document (PDF, image, Word) to our server
  • 2. Conversion: The document is converted into the fax format (TIFF)
  • 3. Transmission: Our fax server dials the recipient's fax number via the telephone network
  • 4. Reception: The recipient's fax machine prints the document, just like a normal fax

For you the process is fully digital, for the recipient a completely normal fax comes out of the machine. The technology behind it is complex, the operation is very simple.

Online fax vs traditional fax: the differences

Why should you use online fax instead of buying a classic fax machine? The advantages are compelling:

  • No hardware: No fax machine, no paper, no toner, no telephone line
  • Location independent: Fax from anywhere, at home, on the go or on holiday
  • Available 24/7: Send faxes any time, even at night or on weekends
  • Digital proof: Transmission reports are automatically delivered and archived by email
  • More affordable: No purchase costs, no maintenance, you pay only per use

The only difference for the recipient: they will not notice any. The fax comes out of their machine just like a classic fax.

When is fax still needed today?

Despite email and digital communication, fax remains standard or even mandatory in many areas:

  • Authorities and public offices: Registry offices, tax offices and immigration authorities often prefer fax
  • Courts: Time-sensitive documents are often filed by fax
  • Healthcare: Doctors, hospitals and pharmacies often communicate by fax due to data protection
  • Lawyers and notaries: Signed documents and powers of attorney are transmitted by fax
  • Cancellations: Insurers, gyms, mobile providers, fax is considered a reliable proof of delivery
  • Banks and financial institutions: Orders and approvals often require fax transmission

The reason: fax provides a delivery confirmation with proof that is recognised in court, unlike a simple email.

Frequently asked questions

What is the difference between online fax and normal fax?

With a traditional fax you need a physical fax machine with a telephone line. With online fax a fax server takes over this task: your digital document is sent over the internet to the server, which then transmits it via the telephone network to the recipient's fax machine. The result is identical, the recipient receives a normal fax.

Is online fax just as legally valid as normal fax?

Yes, online fax has the same legal validity as a traditional fax. You receive a transmission report with date, time and recipient fax number as proof. This is recognised by authorities, courts and companies as proof of delivery, ideal for cancellations and time-sensitive documents.

How much does an online fax with FaxMonkey cost?

The first page costs 1,00 €, each additional page only 0,25 €. There is no basic fee, no subscription and no hidden costs. You pay only when you actually send a fax, securely via Stripe.

Who still needs fax today?

Surprisingly many institutions still require or accept fax: authorities and public offices, courts, doctors and hospitals, law firms, insurers, banks and notaries. Especially for cancellations, signed contracts and time-sensitive documents, fax is often the safest or required means of transmission.

How fast does an online fax arrive?

Usually your fax reaches the recipient within 1-5 minutes. The exact duration depends on the availability and speed of the recipient's fax machine. If the line is busy, our system automatically retries delivery. You will be notified by email as soon as delivery has succeeded.

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