FAX to G4 conversion is the process of converting digital or scanned fax files (commonly stored as TIFF or TIFF-F format) into the Group 4 (G4) fax image compression format, a bilevel (black-and-white) CCITT standard optimized for high-compression fax transmission and archival. This conversion re-encodes the image using CCITT Group 4 compression to reduce file size while preserving sharp monochrome line art and text for long-term storage or fax compatibility.
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Read guide →Drag your .FAX file from your computer or use the browse function.
Confirm .g4 as the selected destination format.
Click "Convert" and download your converted .G4 file once ready.
FAX files typically use the TIFF format with CCITT Group 3 compression, while G4 files employ CCITT Group 4 compression, resulting in smaller file sizes. The MIME type for these files is usually image/tiff. G4 compression is lossless, making it ideal for fax image archiving and transmission.
The G4 (.G4) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like FAX.
While specific technical details aren't available here, G4 files generally serve the purpose of storing image effectively within their domain.
Our Online FAX to G4 Converter provides a seamless way to transform your FAX files into the G4 format without any software installation. Designed for users needing efficient and high-quality document conversions, this tool ensures your files remain crisp and easy to manage.
FAX files are typically larger and less efficient compared to G4 files, which use advanced compression techniques. While FAX format was designed for transmission over telephone lines, G4 is optimized for modern digital faxing and storage. Choosing G4 over FAX improves file handling and reduces storage requirements.
Keep individual fax pages at 200–300 DPI for best readability with minimal file size; higher DPI increases size without improving black-and-white text clarity.
Preserve quality by converting from the original TIFF/FAX source rather than from a re-scanned or lossy JPEG/PDF image to avoid artifacts.
For large volumes, use batch conversion tools that maintain page order and metadata; process overnight to avoid bandwidth or CPU bottlenecks.
Note format limitation: G4 is a bilevel (1-bit) format—it cannot store grayscale or color information; converting color or grayscale faxes will dither or threshold to black-and-white.
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Up to 250MB
Optimal file sizes for G4 are typically much smaller than uncompressed TIFF; a typical single-page black-and-white fax at 200–300 DPI often compresses to 10–100 KB depending on content complexity.