Can I receive faxes directly as PDF files?

Yes. Online fax services like [mFax](https://mfax.to) assign you a virtual fax number and deliver every incoming fax as a PDF — to your email, app, or web dashboard. No fax machine needed.

How do I convert a .fax or .efx file to PDF?

Open the file in Windows Fax and Scan or the fax viewer that came with your fax software, then use File > Print and select "Microsoft Print to PDF" (Windows) or "Save as PDF" (Mac). Alternatively, use a free online converter like Convertio.

Is it free to convert a fax to PDF?

Converting an existing fax file to PDF is free using built-in OS tools or online converters. Receiving future faxes as PDFs requires an online fax service — [mFax](https://mfax.to) offers pay-per-fax pricing with no monthly commitment.

What format do online fax services use for received faxes?

PDF is the universal default. Some services also offer TIFF. PDF is preferred because it opens on any device without special software. See our [guide to receiving faxes online](/blog/how-to-receive-fax-online/) for setup instructions.

Can I scan a paper fax to PDF with my phone?

Yes. Use your phone's built-in scanner (iPhone: Notes app, Android: Google Drive) or the mFax app to scan a paper fax and save it as a PDF. You can then forward it by fax or email directly from the app.

How to Convert a Fax to PDF (Receive Faxes as PDF Files)

Need your faxes as PDFs? Learn how to receive incoming faxes as PDF attachments, convert fax files to PDF, and scan paper faxes to PDF — with step-by-step instructions for every method.

Frequently Asked Questions

Can I receive faxes directly as PDF files?: Yes. Online fax services like [mFax](https://mfax.to) assign you a virtual fax number and deliver every incoming fax as a PDF — to your email, app, or web dashboard. No fax machine needed.
How do I convert a .fax or .efx file to PDF?: Open the file in Windows Fax and Scan or the fax viewer that came with your fax software, then use File > Print and select "Microsoft Print to PDF" (Windows) or "Save as PDF" (Mac). Alternatively, use a free online converter like Convertio.
Is it free to convert a fax to PDF?: Converting an existing fax file to PDF is free using built-in OS tools or online converters. Receiving future faxes as PDFs requires an online fax service — [mFax](https://mfax.to) offers pay-per-fax pricing with no monthly commitment.
What format do online fax services use for received faxes?: PDF is the universal default. Some services also offer TIFF. PDF is preferred because it opens on any device without special software. See our [guide to receiving faxes online](/blog/how-to-receive-fax-online/) for setup instructions.
Can I scan a paper fax to PDF with my phone?: Yes. Use your phone's built-in scanner (iPhone: Notes app, Android: Google Drive) or the mFax app to scan a paper fax and save it as a PDF. You can then forward it by fax or email directly from the app.