DOC to G4 Converter

Convert DOC to G4 fax compression — free online

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Efficient Compression

G4 compression produces compact monochrome images — DOC pages converted to G4 are small and transmission-ready.

Server-Side Engine

All DOC to G4 processing runs on Convertio servers — your device stays free while conversion happens in the cloud.

Access Anywhere

Convert DOC to G4 on any device — computer, tablet, or smartphone. A web browser is all you need.

How to convert DOC to G4

1

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

2

Choose g4 or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your g4 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
G4 is a monochrome image format based on the ITU-T Group 4 facsimile coding standard (Recommendation T.6), ratified by the CCITT in 1984 as an improvement over Group 3 for use on error-free digital networks like ISDN rather than analog telephone lines. G4 files contain 1-bit image data compressed using exclusively two-dimensional Modified Modified READ (MMR) coding, where each scanline is encoded as a set of differences (changing elements) relative to the line above it. By eliminating the one-dimensional coding fallback and the end-of-line synchronization markers required by Group 3, G4 achieves 20-50% better compression ratios on typical document pages while producing a simpler, more regular bitstream. The format is most commonly encountered as a compression method within TIFF files (TIFF compression tag 4), where it became the standard archival format for scanned documents in enterprise document management, government records, and legal imaging systems. G4 compression is specified at 200, 300, or 400 dpi depending on the scanning application, with 300 dpi being the most common for archival-quality document imaging. One advantage is exceptional compression efficiency for document content: G4's two-dimensional prediction exploits the strong vertical correlation in text and line art pages, typically compressing a 300 dpi letter-size page to 30-50 KB — roughly half the size of equivalent Group 3 encoding. The format's entrenchment in document management infrastructure is another strength — G4 TIFF is the mandated format for many government digital records systems, court filing systems, and corporate archives, supported by every enterprise imaging platform.
Developer: ITU-T (CCITT)
Initial release: 1984

Frequently Asked Questions

Why convert DOC to G4?

G4 uses Group 4 fax compression for efficient monochrome encoding — ideal for archiving DOC pages in fax-compatible document management systems.

What software reads G4 files?

G4 files open in fax viewers, document management systems, IrfanView, XnView, and TIFF viewers that support G4 compression.

How does G4 differ from G3?

G4 offers better compression efficiency than G3 — it produces smaller files while maintaining the same monochrome image quality.

Is DOC to G4 conversion free?

Yes — Convertio provides free DOC to G4 conversion. Premium options exist for professional-grade throughput.

Does it preserve text from DOC pages?

DOC text and line elements are rendered clearly in the G4 output, which is optimized for high-contrast document content.

DOC to G4 Quality Rating

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