FAX to SIXEL conversion is the process of transforming image data stored in a FAX file format (typically TIFF-based Group 3/Group 4 bi-level fax images) into the SIXEL raster graphics format used for encoding bitmap images for terminals and printers. This conversion extracts the scanned/monochrome fax image and re-encodes the pixel data as SIXEL escape sequences or SIXEL-compatible binary, preserving layout and halftone where possible for use in terminal displays or legacy printers.
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Read guide →Drag your .FAX file from your computer or use the browse function.
Confirm .sixel as the selected destination format.
Click "Convert" and download your converted .SIXEL file once ready.
FAX files typically use the MIME type image/fax and are encoded with Group 3 or Group 4 fax compression codecs. SIXEL format uses image/sixel MIME type and encodes images as six-pixel-high bitmap slices, suitable for terminal graphics and legacy systems. The conversion process involves decoding the fax data and encoding it into the SIXEL format to maintain image integrity while enhancing compatibility.
The SIXEL (.SIXEL) 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, SIXEL files generally serve the purpose of storing image effectively within their domain.
Convert your FAX files to SIXEL format online using our efficient and user-friendly converter. Designed for professionals and casual users alike, our tool ensures seamless transformation of your FAX documents into high-quality SIXEL images without any software installation.
FAX files are primarily monochrome and designed for document transmission over telephone lines, leading to lower resolution and limited color depth. SIXEL images, on the other hand, support color graphics and offer higher fidelity with efficient compression techniques. While FAX is optimized for fax machines, SIXEL is suited for graphical terminal displays and digital image use.
Keep input files under 10–50MB where possible for fastest processing; single-page fax TIFFs are typically small (tens to hundreds of KB).
To preserve legibility, convert at the original 200–300 DPI fax resolution or use ordered-dither grayscale when converting halftones.
For batch conversions, group same-resolution files and use consistent dithering/scaling settings to ensure uniform SIXEL output.
Format limitation: FAX is usually 1-bit bilevel; SIXEL supports color and grayscale via dithering but true continuous-tone detail is limited.
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Project Manager
Easy to use and highly reliable tool for converting my fax files to SIXEL format.
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Software Developer
The quality of SIXEL images after conversion exceeded my expectations.
Anna S.
Graphic Designer
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Up to 250MB
Avoid excessive downscaling; reducing resolution below 100 DPI can make small text unreadable in SIXEL output.