Fax.Plus allows you to send a PDF as a fax from your computer or mobile phone without the need for a fax machine or a landline.
Easily send PDF files as faxes from virtually any platform, including web browsers, Windows, macOS, iOS, Android, and email services like Gmail or Outlook. You do not need a traditional fax machine: set up a free account and enjoy a streamlined, digital faxing experience from your computer or smartphone.
Sending a PDF as fax from a computer is fast and straightforward. With Fax.Plus, you can securely transmit documents directly from your PC or Mac.
With Fax.Plus, you can easily fax a PDF from an iPhone or Android. Faxing a PDF online via your mobile phone is as simple as these four steps:
Faxing a PDF from email is one of the most versatile ways to send documents. Fax.Plus allows you to fax directly from your inbox, whether you use Gmail, Outlook, or another email service.
Adobe does not offer a built-in fax service within its applications, like Adobe Acrobat or Adobe Reader. However, you can use Adobe Acrobat to create and save documents as PDFs, which are suitable for faxing and then send them via Fax.Plus. Here is how:
Fax.Plus also integrates seamlessly with Google Drive, enabling you to fax stored files without downloading them first through the PDF to Fax functionality. Here is how:
By using Fax.Plus on your smartphone, your device effectively becomes a portable fax machine. Learn how to scan documents with your camera, and fax them instantly.
Adding a signature to your PDF is simple with Fax.Plus. You can digitally sign documents before sending or request signatures from others.
File Format Issues: Make sure your document is a standard, valid PDF before uploading to Fax.Plus. Errors like “Malformed PDF” or “File encrypted” usually mean the file is corrupted, password-protected, or has unflattened layers, so re-export it without encryption, remove security, and try sending again.
Fax Number Errors: Enter the recipient number in full international format (country code + area code + number). Fax.Plus validates dialing rules and will surface issues such as “failed_unallocated_number” or “failed_invalid_number_format” when the number is unreachable or misformatted. Double-check digits and formatting, then resend or test with another known-working fax line.
Transmission Failures: Intermittent send failures can occur due to temporary network conditions or the recipient’s machine (busy, no answer, or mid-call disconnect), so give it a few minutes and retry. Fax.Plus automatically performs multiple delivery attempts to improve success rates, but if failures persist, confirm the destination line is on, accepts faxes, and isn’t blocking inbound calls.
File Size Limits: Keep total upload size within typical Fax.Plus limits (≤30 MB per fax).

Send your PDF to any fax number for free with Fax.Plus. Our easy-to-use website and app let you upload your document, enter the recipient’s fax number, and send it quickly and securely.
Cross-platform online fax service with the focus on security, compliance, and ease of use
Send and receive faxes online anytime, anywhere. Enjoy full compatibility across web browsers, Windows, Mac, iOS, and Android devices, with support for PDFs, Word documents, and Google Docs.
Create an account to save time and money by sending free faxes from a computer or mobile to anywhere in the world.