Document: What You're Actually Faxing

The file being transmitted as a fax, and which formats a sender can upload without printing or scanning first.

Sarah Mitchell

Published on

September 9, 2026

Last updated on

September 24, 2026

A document, in fax terms, is the file being transmitted: the content that becomes the body of the fax once sent.
Fax.Plus accepts documents directly in common formats, including PDF, Word, and image files, without a physical print-scan-fax step.
Up to 10 files can be uploaded per fax, each up to 75 MB, regardless of how many pages each file contains.
Once uploaded, a document is converted into fax pages and transmitted using standard fax signaling to the recipient's number.

What Counts as a Document?

A document, in fax terms, is the actual file being sent, the source material that becomes the body of the fax once it's transmitted. That body can include a reproduced signature line, which is still just part of the document's own content rather than a separate item. A fax cover sheet is different: it's a standalone page that travels alongside a document instead of being part of it, covering the fields a cover sheet needs to include.

Which Formats Fax.Plus Accepts

Fax.Plus accepts documents directly in PDF, DOC, DOCX, TXT, and RTF formats, along with JPG, PNG, and TIFF images and XLS/XLSX spreadsheets, no separate printer or scanner required. An account can upload up to 10 files per fax, each up to 75 MB, regardless of how many pages a file contains.

From Document to Fax Message

Once a document finishes transmitting, it becomes a fax message, a discrete record in the account, and produces a confirmation once the send completes.

A Common Case: Skipping the Printer Entirely

Someone with a signed PDF contract on their laptop uploads the document directly into Fax.Plus and sends it as a fax, skipping the print, sign, scan, and fax steps a physical machine would otherwise require.

FAQs

What file types can I fax online?

Fax.Plus accepts documents in PDF, DOC, DOCX, TXT, and RTF formats, plus JPG, PNG, and TIFF images and XLS/XLSX spreadsheets, uploaded directly without printing or scanning first.