DOC to FAX Converter

Convert Word DOC to FAX image format — free online

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Fax-Ready Output

DOC pages are converted to FAX-compatible images optimized for transmission — ready for fax systems without further processing.

Any Device Access

Convert DOC to FAX from any device with internet access — desktop, laptop, tablet, or phone. Fully browser-based.

Secure Processing

Your DOC uploads are removed after conversion. FAX image files are deleted from Convertio servers within 24 hours.

How to convert DOC to FAX

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose fax or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your fax file right afterwards

About formats

DOC is the binary document format of Microsoft Word, the word processor first released in October 1983 for MS-DOS and later becoming the dominant document creation tool worldwide. The format stores documents as OLE2 compound document files — a binary container with multiple internal streams holding text content, formatting information, embedded objects, macros, and metadata. The text stream uses a complex system of formatting runs, section descriptors, paragraph and character property tables, and style definitions to represent arbitrarily complex document layouts including columns, headers, footnotes, tables, floating images, tracked changes, and mail merge fields. The format evolved substantially through Word versions, with Word 97 establishing the binary structure that remained standard through Word 2003 and created the .doc files most commonly encountered today. One advantage is near-universal compatibility — DOC files can be opened by virtually every word processor and document viewer across all platforms, from Microsoft Office to LibreOffice, Google Docs, and Apple Pages. The format's rich feature support is another strength: DOC handles complex layouts, embedded OLE objects, VBA macros, and revision tracking that power enterprise document workflows. Although Microsoft introduced the XML-based DOCX format with Office 2007, DOC remains heavily present in existing document archives and continues to be produced by organizations maintaining compatibility with older Word installations.
Developer: Microsoft
Initial release: October 1983
FAX is a generic image file extension associated with facsimile transmission formats standardized by the ITU-T (formerly CCITT), with the underlying Group 3 compression standard ratified in 1980. FAX files typically contain monochrome (1-bit, black and white) image data compressed using the Modified Huffman (MH) encoding defined in ITU-T Recommendation T.4, which assigns variable-length codes to run lengths of consecutive white or black pixels along each scanline. The standard resolution for Group 3 fax is 204x98 dpi (normal mode) or 204x196 dpi (fine mode), reflecting the capabilities of thermal and laser fax machines of the era. FAX files encountered digitally are often raw Group 3 encoded bitstreams or TIFF wrappers with CCITT Group 3 compression (TIFF compression tag 3). The Group 3 encoding scheme is highly efficient for typical business documents — pages with mostly white space and black text — achieving compression ratios of 10:1 to 20:1 compared to uncompressed bitmaps. One advantage is universal fax system compatibility: Group 3 encoding is the mandatory baseline for all fax machines worldwide, meaning FAX files contain data in exactly the format transmitted over telephone lines, preserving the original fax data without transcoding losses. The format's role in business communications history provides another dimension — billions of fax transmissions using this encoding moved legal documents, medical records, and business correspondence for decades, and archived FAX files represent an important documentary record. FAX images can be viewed and converted using LibreOffice, ImageMagick, GIMP, and standard document management systems.
Developer: ITU-T
Initial release: 1980

Frequently Asked Questions

Why convert DOC to FAX?

FAX format is optimized for fax transmission — converting DOC to FAX creates images ready for fax-compatible systems and workflows.

What software opens FAX files?

FAX files open in Windows Fax Viewer, IrfanView, XnView, and fax server software. Some image editors also support the format.

Is FAX a monochrome format?

Traditional FAX images are monochrome, optimized for text and line art. Document pages are rendered in black and white for fax clarity.

Is DOC to FAX conversion free?

Yes — Convertio provides free DOC to FAX conversion online. Premium plans offer expanded limits for high-volume use.

Does the format preserve text legibility?

FAX format is designed for text and line graphics — DOC pages with primarily text content convert cleanly and stay readable.

DOC to FAX Quality Rating

4.5 (4 votes)
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