Yes, you can send a fax through email using an online fax service
You do not need a fax machine or phone line to send a fax. An online fax service lets you send and receive faxes from your email inbox using a web browser or mobile app. You upload a document, type in a fax number, and the service converts your email into a fax and delivers it to the recipient's fax machine.
The recipient sees a standard fax on their end — they do not receive an email. This matters because many businesses, medical offices, and government agencies still use fax machines and expect documents to arrive that way, even though the document originated from your email.
The process takes minutes once you have signed up with a service. Most services charge per fax sent, per month, or offer a combination — some include a small number of free faxes each month before charging kicks in.
Key Takeaways
- Online fax services convert emails into faxes and send them to fax machine numbers, so the recipient receives a traditional fax regardless of how you sent it.
- You upload a document from your computer or phone, enter the fax number, and the service handles the rest — no fax machine required.
- Most services let you receive faxes back to your email inbox, turning incoming faxes into PDF attachments.
- Pricing varies from pay-per-fax (usually $1 to $3 per page) to monthly plans ($10 to $30) depending on how often you fax.
- The recipient's fax machine must be working and connected to receive the fax — if it is offline or out of paper, the fax may fail or sit in a queue.
How the process works from your email
When you use an online fax service, you log into the service's website or app and upload the document you want to fax. Most services accept PDF, Word documents, images, and scanned files. You then enter the recipient's fax number in the format the service requests — usually with the country code and area code, like +1-555-123-4567 for a US number.
The service converts your document into a fax format and sends it through the public switched telephone network (PSTN) — the same system traditional fax machines use. The recipient's fax machine receives it as a standard incoming fax, with no indication that it came from an email. You receive a confirmation email once the fax is delivered or if it fails.
Some services also let you send a fax by emailing an attachment directly to a special fax address they provide, like fax.12345@yourservice.com. You address the email to that number-based address, attach your document, and the service automatically converts and sends it. This method is faster if you are already in your email client.
Receiving faxes back to your email
Most online fax services include a fax number assigned to your account. When someone sends a fax to that number, the service converts it to a PDF and emails it to you. This eliminates the need for a fax machine on your end entirely — incoming faxes land in your inbox like any other attachment.
You can then read, print, or forward the fax to others. Some services let you reply to a fax email by attaching a document, and the service automatically sends it back as a fax to the original sender's number.
Pricing and what to expect
Online fax services use different pricing models. Pay-per-fax services charge $1 to $3 per outgoing fax, regardless of page count — a 10-page fax costs the same as a 1-page fax. This works well if you fax occasionally. Monthly plans typically cost $10 to $30 per month and include a set number of outgoing faxes (often 50 to 150) plus unlimited incoming faxes. If you exceed the limit, you pay per additional fax.
Some services offer a hybrid: a small monthly fee ($5 to $10) with a low per-fax charge ($0.50 to $1) for overages. A few services include a small number of free faxes each month — often 1 to 5 — before any charges explore.
Receiving faxes is almost always included at no extra charge, even on pay-per-fax plans. The cost is in sending. Compare services based on how many faxes you expect to send per month, because a monthly plan becomes cheaper than pay-per-fax once you send more than 10 to 20 faxes.
Common reasons a fax might not go through
The most common failure is an incorrect fax number — double-check the number before sending, because the service cannot verify whether the number is real until it tries to send. If the number is wrong, the fax bounces back and you receive a failure notice.
The recipient's fax machine may be offline, out of paper, or in error mode. The service typically retries for 24 to 48 hours before giving up. Ask the recipient to confirm their fax machine is working and has paper, especially if you are sending to a business for the first time.
Some older fax machines cannot receive faxes sent through internet-based services because of compatibility issues with how the fax is encoded. This is rare but does happen. If a fax repeatedly fails to a specific number, contact the recipient and ask them to check with their IT support or fax machine vendor.
When to use email-to-fax versus a traditional fax machine
Use an online fax service if you fax infrequently, do not have a fax machine, or want to manage faxes from your phone or computer. The setup takes minutes and you avoid buying or maintaining hardware.
A traditional fax machine may be better if you send dozens of faxes daily and already have one installed. The per-fax cost of a service can add up, and a machine with a phone line is a one-time expense. However, most small businesses and individuals find that the convenience and lower upfront cost of an online service outweigh the per-fax fees.
Some people use both: they keep a fax machine for receiving high-volume documents but use an online service for sending, since sending through email is faster and does not require standing at a machine.
Security and privacy when faxing through email
Faxes sent through online services travel over the internet, not a dedicated phone line, so they are technically less private than a traditional fax. However, reputable services encrypt faxes in transit and at rest, meaning the document is scrambled while traveling and while stored on the service's servers.
If you are sending sensitive documents — medical records, financial information, legal papers — choose a service that explicitly states it complies with HIPAA (for health information) or other relevant privacy standards. Read the service's privacy policy to understand how long they keep faxes and who can access them.
For highly sensitive faxes, confirm the recipient's fax number directly with them by phone before sending, so you know the fax is going to the right place and not being intercepted.
Frequently Asked Questions
Do I need to install software to send a fax through email?
No. Most online fax services work through a web browser — you log in, upload your document, and send. Some offer mobile apps for convenience, but they are optional. You do not need to read or install anything on your computer.
Can I send a fax to an international fax number?
Yes, but most services charge more for international faxes — often $2 to $5 per fax instead of $1 to $3 for domestic. Some services do not support certain countries. Check the service's list of supported countries before signing up if you need to fax internationally.
What happens if the fax fails to send?
The service retries automatically for 24 to 48 hours. If it still fails, you receive a failure notification by email. Common reasons are an incorrect number, the recipient's machine being offline, or a compatibility issue. Contact the recipient to confirm their fax number and that their machine is working.
Can I fax documents from my phone?
Yes. Most online fax services have mobile apps for iPhone and Android. You can take a photo of a document, upload it, and send it as a fax directly from your phone. Some services also let you email a fax from your phone's email app if you have the service's special fax email address saved.
Is it cheaper to fax through email or use a traditional fax machine?
It depends on volume. If you fax fewer than 10 times per month, an online service is cheaper because you avoid the cost of a machine and phone line. If you fax 50+ times per month, a traditional machine with a phone line may be cheaper in the long run, though online services are more convenient.