RGB to FAX Converter

Change RGB format to FAX with our free tool

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Drop files here. 1 GB maximum file size or Sign Up

Data Protection

Your uploaded RGB data is deleted right after conversion, and the FAX output is removed from servers within 24 hours — keeping your content private.

Cloud Conversion

All processing runs on remote servers — no local resources consumed. Upload your RGB data and let the cloud deliver your FAX output.

Nothing to Install

The converter lives in your browser — just navigate, upload RGB, select FAX, and grab the result. No desktop app needed.

How to convert RGB to FAX

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

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

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

About formats

RGB is a raw (headerless) image format that stores pixel data as a flat sequence of red, green, and blue sample values with no container structure, compression, or metadata. Each pixel is represented by three consecutive bytes (in 8-bit mode) — one for red intensity, one for green, and one for blue — written in scanline order from the top-left corner of the image to the bottom-right. Because there is no header, the image dimensions and bit depth must be specified externally when reading the file. The format supports multiple bit depths: 8-bit (0-255 per channel), 16-bit (0-65535 per channel), and floating-point variants, with 8-bit being the most common. The RGB color model itself reflects how display hardware produces color — by mixing red, green, and blue light at varying intensities — and raw RGB files represent this model in its most direct digital form. With 8-bit channels, three bytes per pixel yield a 24-bit color palette capable of representing 16,777,216 distinct colors. One advantage is zero-overhead processing: without headers or compression to parse, raw RGB data can be memory-mapped, fed directly into GPU textures, or piped between processing stages with minimal latency — valuable in real-time imaging, scientific instrumentation, and computer vision pipelines where every millisecond matters. The format's universal simplicity provides another practical strength — any programming language can read or write raw pixel data with just basic file I/O, making it a reliable interchange format between custom software that may not share support for structured image containers. Raw RGB files are handled by ImageMagick, FFmpeg, and various scientific and graphics tools.

Developer: ImageMagick Studio LLC

Initial release: 1990

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 RGB to FAX?

Since RGB has no file structure, most viewers reject it. FAX conversion adds the necessary format structure for universal compatibility.

What programs open FAX files?

FAX files can be opened in fax software, IrfanView, XnView, and document management systems with fax support.

Can I convert RGB to FAX on my phone?

Yes — the converter works in mobile browsers on both Android and iOS. No app installation needed, just open the page and upload.

What makes FAX a good target format?

FAX offers fax transmission format, monochrome, compressed. It gives your raw RGB data a proper structure that any image viewer or editor can handle.

Is RGB to FAX conversion lossless?

The pixel data from your RGB source is mapped faithfully to FAX. Whether the result is lossless depends on the FAX format's compression method.

Related Conversions

RGB to JPG

RGB to PNG

RGB to BMP

RGB to GIF

RGB to TIFF

RGB to JPEG

RGB to TGA

RGB to SVG

RGB to XPM

RGB to PPM

RGB to DDS

RGB to PDF

RGB to DXF

RGB to RGBA

RGB to JP2

RGB to WBMP

RGB to PCX

RGB to ICO

RGB to CUR

RGB to PBM

RGB to PGM

RGB to WEBP

RGB to EXR

RGB to FAX

RGB to FTS

RGB to G3

RGB to HDR

RGB to HRZ

RGB to IPL

RGB to MAP

RGB to MNG

RGB to MTV

RGB to OTB

RGB to PAL

RGB to PALM

RGB to PAM

RGB to PCD

RGB to PCT

RGB to PDB

RGB to PFM

RGB to PICON

RGB to PICT

RGB to PNM

RGB to PSD

RGB to RAS

RGB to RGBO

RGB to SGI

RGB to SUN

RGB to UYVY

RGB to VIFF

RGB to XBM

RGB to XV

RGB to XWD

RGB to YUV

RGB to JBG

RGB to JBIG

RGB to HEIC

RGB to HEIF

RGB to G4

RGB to RGF

Specific converters

PDF to FAX

JPG to FAX

PNG to FAX

DOCX to FAX

JPEG to FAX

XLSX to FAX

BMP to FAX

DOC to FAX

TXT to FAX

TIFF to FAX

XLS to FAX

HTML to FAX

ODT to FAX

XPS to FAX

WEBP to FAX

RTF to FAX

PICON to FAX

BIN to FAX

CSV to FAX

CUR to FAX

GIF to FAX

JPS to FAX

ABW to FAX

DBK to FAX

KWD to FAX

SXW to FAX

AW to FAX

3FR to FAX

ARW to FAX

AVIF to FAX