Quick answer: to send a fax online for free, use FaxZero (up to 5 faxes a day to US and Canada numbers, 3 pages plus a cover, no account needed), FaxDroid (a few free pages a day to a wider list of countries, again with no registration), or Dropbox Fax, formerly HelloFax, if you want an account with cloud storage and a reusable fax line. For regular international sending, Fax.Plus offers a small permanent monthly free allowance across a wide country list.
Free tiers change often and every service caps something — pages, destinations, or how many you can send per day. The details below were checked in September 2026; confirm the current limits on the provider’s own site before sending anything time-sensitive.
Despite living in an increasingly digital world, the ability to
to a great many businesses and individuals. Why? Because a fax delivers a hard copy of an official document directly to the recipient. Not only that, you don’t need to have a broadband connection to send a fax.
Fax also has a long-standing reputation for security — though that reputation deserves a closer look, which we cover below.
While very few businesses still have a physical fax machine, there is still a huge demand for fax services. Today, you can
send a free online fax in seconds
– via a digital interface. This marriage of retro and contemporary tech is growing increasingly popular. But with so many services to choose from, how do you know which is right for you?
Below are three of the most widely used
free online fax services
, compared on what each one actually lets you send for free, where it works, and whether you have to register.
Free Online Fax Services Compared
| Service | Free allowance | Where it sends | Account needed? | Best for |
|---|---|---|---|---|
| FaxZero | Up to 5 faxes per day, max 3 pages plus a cover page | US and Canada (international is paid) | No | The occasional one-off fax with zero setup |
| FaxDroid | A small number of free pages per day | A wider list of destinations | No | Sending abroad without signing up |
| Dropbox Fax (formerly HelloFax) | A limited free allowance, then paid plans | Broad coverage | Yes | A reusable fax line with cloud storage |
| Fax.Plus | A small permanent monthly page allowance | A very wide country list | Yes | Occasional international faxing over time |
Two things are worth knowing before you pick. Free tiers almost always add the provider’s branding to the cover page, which matters if the fax is going to a bank, court or clinic. And “free” usually means sending only — receiving a fax generally requires a dedicated number, which is a paid feature almost everywhere.
FaxDroid
What’s most striking about
FaxDroid
is how easy and quick the entire process is. Users can send and receive faxes via a user-friendly browser interface.
There are clear, step-by-step instructions, as well as progress bars to keep you informed. Featuring guaranteed delivery, email notifications and a dedicated fax number, FaxDroid has everything you could possibly need from an online fax service.
The process of sending a fax with FaxDroid couldn’t be simpler. Click the “Send” link at the top of the home page, and click the “Upload” button on the subsequent screen. You can then select the file you wish to send from your computer’s drive. There’s also the option of sending multiple files at the same time.
What makes FaxDroid so impressive is the ease at which unregistered users can send a free fax. Just enter your name, email address and the recipient’s fax number. A confirmation page lets you check your details and preview the document that’s about to be faxed.
If everything is correct, simply click “Next” to send the fax. And that’s it. A progress bar keeps you informed on the progress of your message. And success is confirmed by email.
FaxDroid offers several impressive benefits, including.
Ease of use
Minimal information and just a few clicks of a mouse are all that’s required to send a fax.
No registration required
There’s no need to register or sign up to send faxes with FaxDroid. You can send up to six pages for free every day, with no subscription fees. And you don’t need to provide credit card details to make use of the free fax service.
Free for many destinations
Users can send free faxes to around 30 countries at the time of writing this review. However, expect more countries to be added to the list in the future.
Cheap pay as you go options
There are three services available from FaxDroid: Guest Fax, On Demand Fax and Subscription Plans.
Guest Fax
allows you to send up to six pages for free every day without registering.
On Demand
still allows you to send six free pages, but you need to register. The advantage of registering is having the ability to keep a history of all the faxes you send. This service offers cheap pay-as-you-go options once your free allowance is used.
Subscription Plans
are for business users who need to send faxes regularly as part of their role. You get a dedicated fax number and a log of all your sent and received faxes. Use the service as you would your own fax machine. And there’s no long-term contract you can – you can cancel at any time.
FaxDroid is a versatile, flexible, easy-to-use free online fax service that can’t be beaten on value.
FaxZero
Next on the list is
– a simple online fax service that is both reliable and easy to use. You can send faxes without registering, and you receive a real-time notification when the fax has gone through. The free service allows you to send five faxes per day and a maximum of three pages plus a cover.
While FaxZero’s basic service is free and easy to use, it’s not without its problems. The website is littered with ads, which both distract the user and slow down the page.
Crucially, you can only send free faxes to the USA and Canada. A charge applies for everywhere else. And the pay-as-you-go option is a little inflexible. You must pay for a minimum of 15 pages, which will be far too many for most users.
What’s also a little disappointing about FaxZero is the fax quality – it’s noticeably inferior to FaxDroid’s. Overall, however, FaxZero is a reliable, user-friendly service that delivers a basic service very well.
Dropbox Fax (formerly HelloFax)
is an established free online fax service based in the USA. This highly rated fax platform offers multiple fax lines, fax number transfers, and cloud storage. The user interface is simple, but it makes the process of sending faxes quick and hassle-free.
However, as good as Dropbox Fax is, it’s probably not the right service for casual users or businesses that want a flexible approach to sending faxes. While there’s a free trial, there is no pay-as-you-go option. The free package includes five free fax pages per day.
Any more than this involves entering into a subscription contract priced at around $10 per month (plans rise to $40 per month). This isn’t suitable for businesses that need to send and receive faxes sporadically throughout the course of a trading year.
Crucially, you cannot send a fax via Dropbox Fax without registering. This lack of flexibility won’t suit a lot of small and medium-sized businesses.
Summary
All three of these free online fax services deliver reliability and security. However, if you’re looking for the flexibility to
without registering or committing to a subscription, FaxDroid is the clear winner.
FaxDroid also came out on top in terms of the number of countries included in the free service, as well as in the number of payment options available.
If you need to send a free fax quickly and securely without the need to register, FaxDroid is the best option.
Is Fax Actually Secure? The Honest Answer
Fax has a reputation for being harder to intercept than email, and that reputation is only partly deserved. It is worth understanding properly, because people fax exactly the documents where this matters — medical records, contracts, ID documents.
Traditional fax is not encrypted
A fax sent between two physical machines travels down the phone line as an unencrypted analogue audio signal. There is no encryption at any stage. Anyone with physical access to the line can in principle intercept and decode it. The perception that analogue equals secure comes from the fact that it does not touch the internet, not from any protection built into the format.
There is a second, more modern risk. Security researchers at Check Point demonstrated an attack they called Faxploit, in which vulnerabilities in the fax component of a multi-function printer could be used to reach the wider network — knowing only the fax number. Office fax machines usually sit on the company network and rarely sit behind a firewall of their own.
And the oldest weakness has nothing to do with technology at all: a fax arrives on a shared machine, and pages sit in an output tray where anyone walking past can read them.
Reputable online fax is generally more secure, not less
This surprises people, but it follows from how the services work. Established online fax providers encrypt documents in transit using TLS and encrypt stored files with AES, which is stronger protection than an analogue phone line offers. The document also lands in an account behind a password rather than in a tray in a corridor.
If the document is genuinely sensitive
- Do not use a free tier for confidential material. Free services are designed for convenience, and some place branding or handle documents in ways paid tiers do not.
- For health information in the US, HIPAA compliance depends on the provider signing a Business Associate Agreement and offering appropriate encryption and audit trails. A free account will not normally come with a BAA. Check before sending patient data.
- Confirm the recipient number carefully. Misdialled faxes are one of the most common causes of real-world data breaches, and there is no recall once it sends.
- Ask whether fax is required at all. If the recipient accepts a secure upload portal or encrypted email, that is usually the better route.
How to Send a Fax Online
The process is broadly the same whichever service you use:
- Open the service in a browser — no software or fax machine is required.
- Enter the recipient’s fax number, including the country and area code. This is the step people get wrong; a fax number is not the recipient’s phone number.
- Upload the document. PDF is the safest format because the layout will not shift. Most services also accept Word files and images.
- Add your details for the cover page where one is required.
- Send, then wait for confirmation. Delivery is not instant — a few minutes is normal, and busy lines cause retries.
- Keep the confirmation. If you are faxing a form to an institution, that receipt is your proof it was sent.
Do You Need an Online Fax Number?
Only if you need to receive faxes. This is the single most common point of confusion, so it is worth separating clearly:
| What you want to do | What you need | Typical cost |
|---|---|---|
| Send a fax occasionally | Nothing — a free web service is enough | Free |
| Receive faxes | Your own dedicated fax number | A paid monthly plan almost everywhere |
| Send and receive regularly | A subscription with a number and page allowance | Monthly plan, often with an annual discount |
If a form asks you to “fax it back”, you only need to send, so a free service will do. If someone needs to fax you documents, you need a number, and that is a paid feature on essentially every provider.
Frequently Asked Questions
Can I really send a fax online for free?
Yes, for a limited number of pages. FaxZero allows up to 5 faxes a day to US and Canada numbers at 3 pages plus a cover. FaxDroid offers a few free pages daily to a wider set of destinations. Free tiers usually add provider branding to the cover page.
Do I need a fax machine or a phone line?
No. Online fax services connect to the fax network on your behalf, so you only need a browser and an internet connection.
Can I receive a fax for free?
Generally no. Receiving requires a dedicated fax number assigned to you, and that is a paid feature on almost every service. Free tiers are for sending.
How long does an online fax take to arrive?
Usually a few minutes. Delivery depends on the receiving machine, and a busy or faulty line will cause retries, so allow time if there is a deadline.
What file types can I fax?
PDF is the most reliable because the layout is fixed. Most services also accept Word documents and common image formats, converting them before sending.
Is online fax safe for confidential documents?
Reputable paid services encrypt documents in transit and at rest, which is stronger than a traditional fax line. Free tiers are not the right choice for sensitive material, and US health information has specific requirements including a signed Business Associate Agreement.
Can I fax internationally for free?
Sometimes, but the free allowances are smaller. FaxZero’s free tier covers the US and Canada only, while FaxDroid and Fax.Plus cover more destinations. Check the country list before relying on it.
Why did my fax fail to send?
The usual causes are a wrong or non-fax number, a busy or engaged receiving line, a document too large for the free page limit, or an unsupported file type. Confirm the number is a fax line rather than a voice line first.
More on Faxing
We have companion guides on how to fax from a computer on PC and Mac and on sending and receiving faxes online, which cover the setup side in more detail.
