The 7 Best Free Online Fax Services I Tried (2025)

I never thought I’d need to send a fax in 2025.

I mean, who still faxes, right? But then I remembered my sister’s college days. Back in her first year, she had to fax a permission slip just to step outside the campus for a day. A fax! In the era of instant messaging and emails, her college insisted on a process straight out of the ‘90s.

That memory hit me hard when I recently needed to send a fax myself (believe me, there are enough government offices and businesses that require faxes). I definitely have no fax machine, no landline, and absolutely no desire to step into a shady print shop. And so, I went down the rabbit hole of free online fax services.

That’s when I realized the internet is full of “free” online faxing options that either limit you to one page, sneak in watermarks, or trick you into a hidden paywall. But after testing multiple services (and almost giving up), I finally found the best ones that actually work—no scams, no surprises, and most importantly, no fax machine required.

If you’re in the same boat, I’ve got you covered. Here are the best free online fax services that let you send online faxes without the headache.

7 best free online fax services I recommend

If there’s one thing I learned while searching for an online fax service, it’s that convenience is everything. The best online fax services should let me send (and, if possible, receive) faxes without the hassle of outdated hardware, confusing software, or unnecessary fees.

For me, the ideal service is fast, reliable, and easy to use. I shouldn’t have to jump through hoops to send a simple document. A clean, user-friendly interface and the ability to upload files from my phone, email, or cloud storage make all the difference.

Security is another big factor. Since faxes often contain sensitive information, I look for services that offer encryption and secure transmission, because the last thing I need is my document floating around in cyberspace.

Of course, I know free comes with trade-offs. Most free fax services have daily limits or don’t allow incoming faxes. But as long as they’re reliable, secure, and don’t hold my document hostage behind a paywall, they’re worth considering.

What makes the best free online fax services?

To separate the truly useful online fax services from the ones that are more trouble than they’re worth, I evaluated each platform based on several key criteria.

• Reliability and delivery speed: Not all online fax services guarantee instant delivery. Some free options queue faxes for hours, while unreliable services might fail to send them all together. I looked for fax platforms that provide fast transmission times and delivery confirmation receipts because if I’m faxing something important, I need to know it actually arrived.
• Security and compliance: Faxing often involves sensitive documents, from legal contracts to financial statements. I prioritized services that offer end-to-end encryption, secure data transmission, and compliance with industry regulations like HIPAA and GDPR. Some free services lack proper security measures, making them risky for confidential information.
• Page limits and sending restrictions: A fax service is only useful if it actually lets me send what I need. Free services often cap the number of pages I can send per day, while paid plans vary in their limits. The best fax services offer a reasonable number of pages per fax without excessive restrictions, whether for free users or premium subscribers.
• File format support and integrations: A great fax service should accept multiple file formats, including PDF, DOCX, JPEG, and PNG, since different industries work with different types of documents. Bonus points for platforms that integrate with cloud storage (Google Drive, Dropbox, OneDrive) and email-to-fax features, making it easier to fax directly from my workflow.
• Ease of use and mobile accessibility: I want a simple fax solution that is easy to use on desktop and mobile. Many businesses and remote workers rely on their phones, so I tested whether services offered mobile apps or mobile-friendly websites for faxing on the go. Not all free online fax services support mobile apps, but if they did, it got brownie points from me.
• Watermarks and branding: Many free fax services add watermarks or branding to documents, which can make an official contract or application look unprofessional. While I expect some trade-offs with free services, the best ones either avoid this entirely or make it unobtrusive. Paid services, on the other hand, should have completely clean faxes.
• Receiving faxes and dedicated fax numbers: While this is not a must-have in my list of checkboxes, a dedicated fax number is a great brownie point, especially for businesses. So, I checked whether services provided local, toll-free, or international numbers and whether they allowed multiple users to manage incoming faxes efficiently.

By evaluating services against these criteria, I was able to identify the ones that actually deliver a secure and hassle-free experience, whether you’re looking for a quick free faxing solution or a robust business fax service.

I'll be honest and admit that not all check every criterion in my list. But they have strengths that make them worth considering, depending on your needs. Now, let’s take a look at the best options

The free online fax service list below contains real user reviews from the best online fax service category page. It’s important to note that in the context of this list, vendors offering a free trial are also considered free. To be included in this category, a solution must:

• Allow users to send and receive a fax directly from the platform, an email account, or a mobile application
• Give users the ability to edit and sign documents within the tool
• Provide the ability to integrate with an existing fax number

*This data was pulled from G2 in 2025. Some reviews may have been edited for clarity.

1. CocoFax

One of the first things I liked about CocoFax was how easy it was to get started. Signing up literally took me only a few minutes, and I was quickly assigned a fax number. The dashboard is intuitive, making it easy to navigate between inbox, outbox, and sent faxes.

I also appreciated that CocoFax integrates with Google Drive, Dropbox, OneDrive, and email-to-fax, which is incredibly convenient when dealing with cloud-stored documents.

When it came to sending faxes, the process was straightforward. I uploaded a document, entered the recipient’s fax number, and hit send. Within minutes, my fax was delivered, and I received a confirmation. 

Security-wise, CocoFax performs well. It uses encryption to protect documents in transit, which is critical when sending sensitive information. For industries like healthcare and legal services, this added layer of security is a definite plus. 

However, the free plan limitations became apparent quickly. While CocoFax does let you send faxes without paying upfront, there’s a catch. You’re limited in the number of pages you can send. I could send 10 pages for free and then get credits at $0.03 per page. Or referrals can earn you some additional free pages. Also, you've to get on the paid plan to receive a fax. 

If you’re someone who only needs to send an occasional fax, this might be fine, but for businesses or professionals who need consistent faxing capabilities, you’ll likely have to upgrade to a paid plan for a cost-effective solution. 

Would I recommend it? Yes. If you only need to send a one-off fax to IRS agent or your healthcare office or other regulatory body, CocoFax will work great. Also, for small businesses, remote professionals, and startups that still deal with one-off faxes, it’s a solid option.

What I dislike about CocoFax:

• While sending works fine, receiving faxes requires a paid plan. It's not a dealbreaker for me, but it's a bit restrictive if you just need to get a fax occasionally.
• Some features, like adding a cover sheet, receiving a fax, getting a permanent number, and scheduling faxes, come with paid plans. I think this is something to consider if you want to receive a single-use fax or an occasional incoming fax.

What G2 users dislike about CocoFax: 

"Aside from requiring a subscription to receive faxes or to reserve a permanent fax number, I have no complaints about CocoFax. I only need it in order to send some forms that I will be receiving via mail when they are filled out." 

- CocoFax Review, verified G2 user. 

2. Documo

Documo’s mFax immediately felt different from most online fax services I’ve tried. The moment I logged in, it was clear that this platform was built with business users in mind. It's not just as a quick-fix faxing tool but as a fully-featured, secure, and scalable solution.

A major selling point of Documo's mFAx is security. Documo is HIPAA-compliant, meaning it’s a great fit for healthcare providers, legal professionals, and businesses who need to send and receive secure and sensitive documents.

Documo offers a 14-day free trial with 100 pages, which I think is more than enough for occasional fax needs and to get a real sense of how it works. Instead of locking basic features behind a paywall, Documo actually lets you experience the platform before committing, which I really appreciated. But remember, you need to sign up with your work email ID.

Something I really liked about Documo was the built-in file converter, which made handling documents much easier. Instead of scrambling to find the right file format, I could simply drag and drop files, convert them to PDF or TIFF, and send them directly from the platform. This was especially useful when working with scanned images or different file types that weren’t originally formatted for faxing.

Cloud storage integrations with Dropbox, Box, and Google Drive made the process even smoother. I could pull documents directly from my storage without having to download and re-upload them. There are also other bells and whistles like adding e-signature, but it comes with extra cost. 

Now there aren’t any major dealbreakers if you’re just using Documo for occasional fax needs. The platform works smoothly, and for most users, it does exactly what it promises. But if you rely on faxing regularly for business or critical operations, there are a few things to keep in mind.

I saw some G2 users mentioning that parts of the UI can be a little confusing. While the overall interface is modern and easy to use, some settings aren’t as intuitive as they could be, like if you're configuring advanced options. Sometimes, it can take longer to send faxes, or there can be some downtime, according to a few users. Personally, I did not face any issues, but you can consider these if you are looking at the paid plans.

That said, Documo's mFax is a solid option for businesses and professionals who fax regularly and need a secure, reliable solution, especially for those in the healthcare field.  

What I disliked about Documo:

• Some settings aren’t super intuitive. While the interface is modern, I saw some G2 users mention that the admin console can be a little confusing, especially when tweaking advanced settings.
• Occasionally, faxes take longer to send. Most of my faxes went through quickly, but one G2 user pointed out that there were times when it took longer than expected. If you’re in a rush, that could be annoying.

What G2 users dislike about Documo:

"Sometimes it takes longer to send faxes."

- Documo Review, Mariela S. 

3. Dropbox Fax (HelloFax)

Now I am pretty sure we always thought of Dropbox as just a cloud storage service, but what I didn’t know was that it also lets you send faxes with Dropbox Fax (formerly HelloFax). After testing it out, I'd say it is one of the best free online fax services for your one-off faxing needs. 

The interface itself is clean and modern, and uploading files is as simple as dragging and dropping. I could get files from Dropbox (obviously), Google Drive, OneDrive, Box, and Evernote easily. 

But the biggest advantage for me? Built-in e-signatures. Unlike most online fax services, where I have to sign a document separately and then upload it, Dropbox Fax lets me sign documents right within the platform before sending them. This eliminates the extra steps of printing, signing, and scanning, making it perfect for handling contracts, approvals, or any paperwork that requires a signature. Plus, this feature is available even on the free plan, which isn’t something I see often. 

That said, the free plan feels pretty limited. I only get five free pages in total, and after that, I have to upgrade to send more faxes. Dropbox does offer a referral and sharing program to earn additional free pages, which is more generous than what CocoFax offers. But still, five pages felt a bit low to me. And like many other online fax services, receiving faxes isn’t included in the free plan. I’d have to upgrade for that.

Another thing that caught me off guard was the lack of a mobile app. While the web interface works well on mobile browsers, there’s no dedicated app for sending faxes on the go. And if I want to send a fax via email from my smartphone, I’d need to be on a paid plan. A mobile app would have made the experience much smoother, especially for people who frequently fax documents while traveling or working remotely.

So, would I recommend it? Yes, if you send faxes occasionally and want a simple, digital-first solution with built-in signing, go for Dropbox Fax. 

What I dislike about Dropbox Fax (HelloFax):

• The free plan is limited. Even though there’s a referral program to earn more, I feel like that limit runs out way too fast.
• Sending a fax from my phone isn’t as easy as it could be. I can fax from a mobile browser, but there’s no dedicated app, which feels like a missed opportunity. 

What G2 users dislike about Dropbox Fax (HelloFax):

"Mobile application is not available, hope they will release mobile application of HelloFax. So, instead of sending phone-scanned files to the computer, I can directly fax them via mobile." 

- Dropbox Fax (HelloFax) Review, Stella N.

4. eFax Online Fax Services

For me, eFax seems to be an easy-to-use solution with good compliance features. It offers a 7-day free trial of its Plus plan for individuals.  Now, I didn’t get the chance to try eFax myself due to technical difficulties, so I relied on 100+ G2 user reviews to get a sense of how well it performs.

One of the things that stood out from user reviews based on my research is how easy it is to send faxes. Several users mentioned that eFax makes the process simple and convenient. Some users also appreciated its HIPAA compliance, which makes it a solid choice for healthcare professionals dealing with sensitive documents. But please note that HIPAA compliance comes with premium plans. 

Another plus is the ability to store faxes digitally, so you don’t have to deal with piles of paper files. That’s definitely a useful feature if you send or receive faxes regularly.

But here’s where things get tricky. I noticed some G2 users mentioning cases where faxes failed to send despite receiving confirmation notifications. In most cases, the problem was resolved after working with customer support, but for time-sensitive documents, that’s not ideal. Also, it doesn't automatically resend any failed fax, which means you have to once again input all the information and resend the fax. 

I also saw some users mention that the portal isn’t as user-friendly as they’d like. While some appreciated its integration with email and easy document uploads, others found navigation confusing or preferred the older interface over the latest updates. It’s not a major issue, but something to keep in mind. 

These issues aside, eFax seems like a convenient option for small businesses and for those with HIPAA-compliant faxing needs. 

What I dislike about eFax Online Fax Services: 

• Some users reported faxes failing to send, even with confirmation notifications. I came across multiple complaints about faxes not actually going through. While customer support seems helpful in resolving it, that’s still extra hassle.
• The user interface isn’t for everyone. Some people like the updated version, while others preferred the old UI and found the navigation a bit confusing.

What G2 users dislike about eFax Online Fax Services: 

"Sending a fax is a bit of an arduous process, and after a recent update, my faxes were not being sent despite receiving notifications that they were. We did not realize this for a few weeks, but after an hour of working with customer service, the problem was resolved. Really wish we would have been made aware of the known issue via email or phone call so we could have fixed the problem before weeks of missed sent and received faxes." 

- eFax Online Fax Services Review, Christy B.

5. iFax

When I first looked into iFax, I wasn’t sure what to expect. The service offers a 7-day free trial, but the catch? You need to enter your credit card details upfront. That always makes me pause a bit. I prefer free trials that let me test things out before committing to a payment method. But since G2 reviews were mostly positive, I figured it was worth checking out.

From the moment I got in, one thing was clear: iFax is built for simplicity. The interface is modern and incredibly easy to navigate. I didn’t have to dig through menus or second-guess how to send a fax. It was as simple as entering a recipient, attaching my document, and clicking send. I can see why so many users appreciate the ease of use, especially for people who don’t send faxes often.

Plus, the mobile apps were a standout for me. Unlike some services that only work in a browser, iFax has dedicated apps for iOS and Android, making it convenient to send faxes from anywhere.

It easily integrates with cloud storage platforms. What surprised me was its Hubspot integration, which could be useful for small businesses. But there are some drawbacks. 

One thing that bugged me was that some features that should really be standard come with an extra cost. For example, receiving faxes and HIPAA compliance is only available on higher-tier plans, which honestly seems like something that should be included in all paid plans.

iFax's pricing also makes more sense for businesses or individuals with high-volume faxing needs, but for someone who just needs to send a fax once in a while, it might feel like you’re paying for more than you actually use.

On the whole, iFax is a great choice if you fax regularly and need a professional, well-integrated solution.

What I dislike about iFax:

• Some key features are locked behind higher-tier plans. I get that premium features come at a price, but things like receiving faxes shouldn’t be restricted to the most expensive plans. It feels like something that should be standard for all paid users.
• The pricing isn’t the best fit for occasional faxers. If I were sending faxes all the time, it might be worth it. But for someone who just needs to send a few pages now and then, the cost feels a little high.

What G2 users dislike about iFax:

"There are some features that you have to pay extra for that should really be commonplace." 

- iFax Review, Erin N.

6. RingEX

Researching RingEx as an online fax service, I quickly realized it’s more than just faxing. RingCentral is a full communication suite that includes calling, voicemail, messaging, and faxing all in one platform. For businesses that need an all-in-one solution, this makes a lot of sense.

Now, RingCentral offers a 14-day free trial that requires credit card information to sign up. Setting it up is easy from what I saw. What stood out to me was how flexible and accessible faxing is with RingEx. I could send, receive, and manage faxes across smartphones, tablets, and computers, which meant I wasn’t tied to a single device.

If I needed to fax the same document to multiple people, the “Fax Broadcasting” feature allowed me to send it to up to 50 recipients at once, which would be a big time-saver for businesses that fax regularly. Another major advantage was the ability to receive multiple faxes simultaneously. 

A big highlight for me was how reliable the platform felt overall. I saw multiple G2 users mention that RingEx delivers good quality and a well-integrated experience, making it easy to use across different communication needs.

But there were a few things that could be improved. Given that RingCentral provides a solid all-in-one communication platform, setting up and configuring the whole system isn’t always as straightforward from what I saw. Some G2 users mentioned that certain options are difficult to master without help from customer support, and I can see how that could be frustrating for those who prefer a plug-and-play experience. 

Also, reaching customer support can sometimes take longer than expected. While I didn't personally encounter this problem, I saw G2 users mentioning longer wait times before getting assistance. 

Overall, I’d recommend RingEx if you’re running a business and need a scalable, all-in-one communication solution that includes faxing. However, if you’re only looking for a straightforward faxing tool, you might want to try its Fax-only package instead.

For one-time or occasional faxing, this list includes simpler and more budget-friendly options that might be a better fit.

What I dislike about RingEX: 

• Some features take a bit of setup. I saw some G2 users mention that they needed customer support to walk them through certain configurations.
• Customer support can take time to reach. While most users said the support team is helpful and knowledgeable, a few mentioned that response times could be slow. 

What G2 users dislike about RingEX: 

"There are a few things that bug me. The mobile app can be pretty slow and sometimes freezes when I am trying to enter customer info on the go. Customer support takes forever to respond when I have technical issues. Sometimes, it takes 2-3 days to get a proper reply. The pricing is also a bit on the expensive side for smaller teams like ours. Also, the reporting features, while good, could use more customization options"

- RingEx Review, Vinay G. 

7. Upland InterFAX

Upland InterFAX is a straightforward online fax service that focuses on simplicity and efficiency without unnecessary extras, in my view.  It also offers a 30-day free trial, but unlike other services where you can sign up instantly, you have to request access first and wait for their team to get in touch. It’s an extra step, but once inside, the experience seems smooth. 

To get a feel for how it works without waiting for trial approval, I checked out their demo video, which gave me a quick overview of the platform’s functionality.

I took a closer look at InterFAX’s interface and I have to say it’s a straightforward, no-nonsense online faxing service. The dashboard is clean. I liked that it supports a wide range of file formats like PDF, DOCX, and PNG, making it flexible for different document types. 

Something I found interesting and valuable was the feature to redact certain sections of a document you receive via fax before forwarding it to other people. I can see how it would be useful for anyone handling sensitive documents.

Whether it’s hiding personal information, redacting confidential details before sharing with a client, or just making sure only relevant parts of a fax are sent forward, this feature adds an extra layer of control. It’s a small but valuable tool that could make a big difference in certain industries like legal, healthcare, or finance.

Another thing I really appreciate is how stable and reliable InterFAX is. There’s nothing worse than sending an important fax and not knowing if it actually went through, but with InterFAX, that’s rarely a concern. Outbound faxes tab clearly shows whether the fax was sent successfully or if there was any error or failure. 

But there are some limitations. One thing that quickly became clear from my experience is that InterFAX is not exactly built for those who just need to send a single fax in a hurry without any commitment for free. You have to get in touch with their team for the free trial.

That said, if you’re looking for a reliable, business-grade faxing solution and don’t mind a bit of setup time, InterFAX is worth considering. It may not be the fastest to get started with, but once you're in, it delivers stability and security—things that matter when faxing is an essential part of your workflow. 

Also, the UI can be a bit clunky to deal with in the beginning. But this is a minor inconvenience and definitely not a dealbreaker for me. So, consider InterFAX if you are a business that needs a dependable, secure, and well-integrated faxing solution.

What I dislike about Upland InterFAX:

• If I just need to send a quick fax for free and move on, InterFAX isn’t the best fit. I have to request access to a free trial, which takes extra time.
• The UI feels a little clunky, based on what I gathered from some G2 user reviews. While it’s functional, it’s not the most intuitive platform.

What G2 users dislike about Upland InterFAX:

"The user interface is a little clunky and can take some getting used to. Menu structure is good, but what you can do with the faxes is limited." 

- Upland InterFAX review, Dustin B.

Frequently asked questions on free online fax services

Q: Can I really send a fax for free online?

A: Yes, but with limitations. Some online fax services allow you to send a limited number of pages for free, usually as part of a trial or freemium model. For example, services like CocoFax and Dropbox Fax (HelloFax) offer a small number of free pages before requiring an upgrade. However, truly unlimited free faxing is rare.

Q: Can I receive faxes for free?

A: Receiving faxes usually requires a paid plan, as most free fax services only allow sending a limited number of pages. If you need a dedicated fax number for receiving faxes, you’ll likely have to upgrade.  

Q: What’s the best free online fax service?

The best free online fax service depends on what you need:

• If you’re looking for a truly free option to send a few pages, CocoFax (up to 10 pages free) and Dropbox Fax (HelloFax) (up to 5 pages free) are some of the better choices
• .FaxZero, GotFreeFax, and FAX.PLUS offers limited free faxing:
  • FaxZero – Up to 5 faxes per day, each with 3 pages plus a cover.
  • GotFreeFax – Up to 2 faxes per day, each with 3 pages, no ads on the cover.
  • FAX.PLUS – Up to 10 free faxes before requiring an upgrade.

• Documo, RingEx, eFax, iFax and Upland InterFAX offer free trials that allow you to send and receive faxes and test premium features temporarily.

Q: How easy is it to use online fax services?

A: Most free online fax services are incredibly user-friendly. Setting up typically involves a quick signup and verification process. Sending and receiving faxes is often as simple as uploading documents and entering the recipient’s number.

Q: Can online fax services handle high fax volume?

A: Free plans often come with limits on monthly faxes sent and received. Upgrading to a paid plan typically increases these limits and offers features like priority sending and fax broadcasting for high-volume users.

Q: Is your data secure with a free fax service?

A: Look for secure data transmission and storage services, ideally with encryption protocols like secure sockets layer (SSL) or transport layer security (TLS).

Q: Can you fax internationally with the free plan?

A: Some free plans restrict outgoing faxes to specific countries. Check the service's details to see if international faxing is included and if there are additional fees.

Q: What are the common limitations to the free versions of online fax?

A: Free plans often limit the number of monthly faxes, document size, and available features. Paid plans offer higher limits, additional features like fax archiving and integrations with other tools, and priority support.

Fax without fuss

Honestly, I never thought much about faxing until I actually needed to send one. Then I realized how frustrating it can be to find a fax machine or deal with outdated hardware just for a single document. That’s why online fax services are such a great tool. Whether you’re sending a one-time fax for free or looking for a long-term business solution, there’s an option that fits.

Free fax plans are great if you only need to send a few pages occasionally, but I found that most of them limit features like receiving faxes, scheduling, or adding cover sheets. If you fax regularly, upgrading to a paid plan removes those roadblocks and adds reliability. It’s something to consider if faxing is part of your daily workflow. Hopefully, this list helps you find the right service so you can fax without the headache.

Figuring out what to do these documents after you've faxed them? Explore free document management software for your needs!