Customers & Business
Is Online Fax Secure? All You Need to Know
last updated Updated
August 18, 2026
6 min read
Customers & BusinessWhen team members can perform their tasks more efficiently, that opens up new opportunities and can drive growth.
In 2026, the talk is all about AI and how its improving efficiency in the workplace. Even though many companies have jumped in feet first, the jury’s still out on whether it’s going to provide long-term productivity and financial gains. By comparison, there are some easy digital solutions you can add that can boost productivity immediately without the high cost of funding AI agents and large language models.
Online faxing is one such case helping you increase efficiency and spark growth. While faxing itself may seem old school, it has several key advantages over email, including security. In fact, online faxing is one of the most secure forms of communication today.
Can You Trust Online Fax Services?
While online faxing has become increasingly popular over the past few years, some people are still hesitant to use it If you’re concerned about safety and wondering, is faxing secure, you can rest easy.
When you choose the safest online fax service, you benefit from encrypted file-sharing service to protect your sensitive data. Look for a service that offers AES 256-bit encryption and Transport Layer Security (TLS), the highest encryption standards available.
With AES 256-bit encryption, both you and the fax server have a copy of the fax as you transmit using the internet. For faxes sent to you, once you receive the file, you’re the only person who can access it.
How Secure Are Online Fax Services?
If you’re using a traditional fax machine, you put any information you send at risk. Traditional fax machines do not encrypt your files in transit, especially if they’re using physical phone lines. And we’ve all seen faxes left sitting on the machine for hours, available for anybody walking by to read.
Conversely, eFax uses encryption technology that scrambles sensitive data and keeps it secured. The technology makes it harder for hackers to tamper with or steal your information.
Plus, you can never guarantee your fax won’t fall into the wrong hands when it reaches its destination.
Online faxes aren’t as vulnerable to unauthorized access. An unauthorized party will only find scrambled information if they try to access your fax. It’s impossible to decipher this information without a data decryption key. Only those with the decryption key can access the original message.
How to Securely Transfer Files over the Internet
If you want to know how to send a file securely, the answer is simple. You need to invest in a secure online fax service.
With secure file-sharing online solutions from eFax, you’ll feel at ease knowing your communications are safe and sound and your faxing solution can meet your demands.
How to Send Documents Securely over the Internet
With online faxing, you can fax from tools you use every day, like your computer or smartphone. With either of these devices and eFax, you have everything you need to send a fax immediately. eFax allows you to send your fax using email, eFax Print-to-Fax or our mobile app.
You can compose and edit your fax and send it by email. You can then receive a response and sign documents using your mobile device.
How to Send Files Securely via Email
A secure online fax service provides military-grade, end-to-end encryption. You can send faxes using well-known email services like Outlook, Gmail, or Yahoo. You can also use your custom domain to send faxes with eFax.
You can read our Guide: How to Send Faxes Online or follow the steps below to get started.
How to Send Faxes from Your Desktop
You can send a fax from your desktop by downloading eFax Print-to-Fax Software. It works with both Windows and iOS.
The steps for sending a fax from your desktop are as follows:
Step 1: Open eFax Print-to-Fax and log in.
Step 2: Go to the “File” menu and click “Create New Fax.”
Step 3: Select your recipient’s number from your contacts or enter it manually.
Step 4: Add up to ten attachments.
Step 5: Click “Send Fax.”
Your document(s) will arrive at your recipient’s fax machine.
How to Send Faxes from Mobile
eFax Mobile is available for both Android and iOS devices. You can download our official app on Google Play or the Apple App Store.
Here’s how to send a fax using your mobile device:
Step 1: Open the eFax app and tap “View Faxes.”
Step 2: You can add your signature by tapping “Sign Faxes.”
Step 3: Save your signed fax.
Step 4: Tap “Send Faxes.”
Step 5: Choose your recipient.
The recipient will receive your document just as with faxes that originate from a landline.
Is Fax Secure for Sensitive Data?
Many professionals need to handle sensitive information, including trade secrets, financial details, or private employee or client information. Security is always a top priority. Any compromised data can cause many unwanted consequences, including lost revenues, prolonged downtimes, breaches of customer trust, and reputational damage.
This is especially true in industries that need secure faxing:
Using a traditional fax machine is far less secure, and malicious actors can gain access to sensitive information. If you want to send secure info over the internet, it’s much safer to use an online fax service.
Does Online Faxing Meet Mandated Security Standards?
An online fax service will enable you to comply with regulations such as the Health Insurance Portability and Accountability Act (HIPAA). The Graham-Leach Bliley Act (GLBA), and others. HIPAA rules safeguard personal health information, while GLBA requires that financial institutions protect their customers’ private data.
Suppose you handle this kind of sensitive information. In that case, you must ensure your online fax service meets regulatory HIPAA or GLBA compliance standards for all the vital work you can do with online faxing. At eFax, our online fax software empowers you to comply with these and other regulatory mandates or industry standards. You can rest assured that any confidential information you share stays protected.
Also Read: Is Fax HIPAA compliant?
Is It Safe to Fax Personal Information?
What if you’re not sending faxes for professional purposes? Many of us need to fax private information for various reasons, such as insurance claims or loan processing. No matter the intent, your best bet is to use a secure online fax service.
With eFax, you can trust that your personal information stays encrypted throughout the entire transmission. You’ll never need to fret about your private data falling into the hands of bad actors.
Is Online Fax Safer Than Email?
A premium online fax service is more secure than standard email. Email passes through several networks and servers as it travels from the sender to the recipient. Every link in the network is a point of weakness. These points are vulnerabilities where hackers can intercept your faxes. In what’s called a middleman attack.
The answer is simple if you want to know how to send a file securely. Invest in a secure online fax service, like eFax.
What is the Safest File Sharing Site?
eFax is the most secure way to transfer files. With eFax, all your faxes remain private and confidential. We’ll provide you with your own safe, personal email inbox.
Our servers have nearly 100% uptime. For this reason, you’re assured of secure, encrypted delivery of all your essential fax communications. eFax is the clear choice for secure sharing of documents and files.
