How to fax from a computer

Open an online fax service in your browser, upload the file and type the fax number. Windows Fax and Scan and old Mac fax settings need a fax modem and a landline, which most computers no longer have.

Modern computers don’t have the fax modem that built-in fax tools need. Sending through a website is the simple way around it.

Step by step

Save the document as a PDF (in most apps: File → Print → Save as PDF).
Open confirmfax.com in any browser and drop the PDF onto the cover sheet.
Enter the fax number, plus a cover page if the office wants one.
Pay $2.99 and wait for “Delivered”.

What about Windows Fax and Scan?

It still ships with Windows, but it needs a fax modem connected to a working landline. Without that hardware it can’t send anything.

ConfirmFax costs $2.99 per fax with no subscription. On the website you’re charged only when the fax is delivered.

Last checked November 2026.

More guides

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Free fax online: what’s actually freeFree fax sites pay for the phone call with ads or by upselling a plan. That’s fine for a short, non-sensitive fax.
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