FAX to RGBO Converter

Free FAX to RGBO conversion — browser-based tool

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

Private & Secure

Uploaded FAX files are erased right after conversion. RGBO results are automatically deleted within 24 hours.

Fax to Digital

Bridge the gap between legacy FAX encoding and RGBO — preserve and modernize your fax document archive.

Nothing to Install

The FAX to RGBO conversion happens in your browser — no software to download or configure on your device.

How to convert FAX to RGBO

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

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

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

About formats

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

RGBO is a raw pixel data format designation used by ImageMagick, the open-source image processing suite first released in 1990, representing images as a flat sequence of Red, Green, Blue, and Opacity (inverted alpha) sample values with no header, container, or compression. The RGBO channel ordering specifies that the fourth channel is opacity rather than alpha — where alpha represents transparency (0 = transparent, max = opaque), opacity represents the inverse (0 = opaque, max = transparent). This distinction matters in compositing pipelines where the mathematical convention for the fourth channel varies between systems: some compositing models work with alpha (transparency), while older conventions including portions of ImageMagick's internal processing historically used opacity. RGBO files contain raw sample data at a user-specified bit depth (8-bit, 16-bit, or floating-point per channel), with pixels stored in scanline order. Because there is no header, the image dimensions, bit depth, and endianness must be specified externally when reading the file — typically via ImageMagick command-line arguments. One advantage is direct compatibility with processing pipelines that use the opacity convention: RGBO eliminates the need for channel inversion when interfacing with systems that expect opacity rather than alpha, preventing subtle compositing errors that occur when transparency conventions are mixed. The format's raw-data nature provides another practical benefit — with no encoding overhead, RGBO data can be memory-mapped, processed with SIMD instructions, or piped between processes with minimal latency. RGBO is primarily used within ImageMagick processing chains and can be converted to any other format using ImageMagick's extensive format support.

Developer: ImageMagick Studio LLC

Initial release: 1990

Frequently Asked Questions

Why convert FAX to RGBO?

FAX files require specialized fax viewers. Converting to RGBO lets anyone open the content easily.

How do I view a RGBO file?

Use ImageMagick or SGI-compatible tools to view RGBO files.

Will my FAX content stay sharp in RGBO?

Full resolution is preserved during FAX to RGBO conversion. Text and graphics remain sharp and clear.

Is there a charge for FAX to RGBO?

Basic conversions are free. Premium subscriptions provide priority processing and expanded daily capacity.

Can I process many FAX files in one go?

Absolutely — add several FAX files at once. Each gets its own RGBO conversion and individual download link.

How fast is FAX to RGBO conversion?

Most FAX files convert to RGBO in seconds. Processing runs on cloud servers so your device stays unaffected.

Related Conversions

FAX to PDF

FAX to JPG

FAX to TIFF

FAX to JPEG

FAX to PNG

FAX to BMP

FAX to JP2

FAX to JIF

FAX to DXF

FAX to DOT

FAX to XPM

FAX to WBMP

FAX to GIF

FAX to TGA

FAX to SVG

FAX to PCX

FAX to ICO

FAX to CUR

FAX to PBM

FAX to PGM

FAX to PPM

FAX to WEBP

FAX to EXR

FAX to FTS

FAX to G3

FAX to HDR

FAX to HRZ

FAX to IPL

FAX to MAP

FAX to MNG

FAX to MTV

FAX to OTB

FAX to PAL

FAX to PALM

FAX to PAM

FAX to PCD

FAX to PCT

FAX to PDB

FAX to PFM

FAX to PICON

FAX to PICT

FAX to PNM

FAX to PSD

FAX to RAS

FAX to RGB

FAX to RGBA

FAX to RGBO

FAX to SGI

FAX to SUN

FAX to UYVY

FAX to VIFF

FAX to XBM

FAX to XV

FAX to XWD

FAX to YUV

FAX to JBG

FAX to JBIG

FAX to HEIC

FAX to HEIF

FAX to G4

Specific converters

JPG to RGBO

PNG to RGBO

BMP to RGBO

HTML to RGBO

TXT to RGBO

WEBP to RGBO

JPEG to RGBO

ICO to RGBO

PDF to RGBO

PFM to RGBO

GIF to RGBO

PSD to RGBO

RTF to RGBO

DOCX to RGBO

AVIF to RGBO

ABW to RGBO

DBK to RGBO

KWD to RGBO

SXW to RGBO

AW to RGBO

3FR to RGBO

ARW to RGBO

CR2 to RGBO

CRW to RGBO

CUR to RGBO

DCM to RGBO

DCR to RGBO

DDS to RGBO

DNG to RGBO

ERF to RGBO